US20050116865A1 - Multifrequency inverted-F antenna - Google Patents
Multifrequency inverted-F antenna Download PDFInfo
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- US20050116865A1 US20050116865A1 US11/034,164 US3416405A US2005116865A1 US 20050116865 A1 US20050116865 A1 US 20050116865A1 US 3416405 A US3416405 A US 3416405A US 2005116865 A1 US2005116865 A1 US 2005116865A1
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- antenna
- radiating
- radiating element
- interconnection
- grounding
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2258—Supports; Mounting means by structural association with other equipment or articles used with computer equipment
- H01Q1/2266—Supports; Mounting means by structural association with other equipment or articles used with computer equipment disposed inside the computer
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1613—Constructional details or arrangements for portable computers
- G06F1/1615—Constructional details or arrangements for portable computers with several enclosures having relative motions, each enclosure supporting at least one I/O or computing function
- G06F1/1616—Constructional details or arrangements for portable computers with several enclosures having relative motions, each enclosure supporting at least one I/O or computing function with folding flat displays, e.g. laptop computers or notebooks having a clamshell configuration, with body parts pivoting to an open position around an axis parallel to the plane they define in closed position
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1613—Constructional details or arrangements for portable computers
- G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
- G06F1/1684—Constructional details or arrangements related to integrated I/O peripherals not covered by groups G06F1/1635 - G06F1/1675
- G06F1/1698—Constructional details or arrangements related to integrated I/O peripherals not covered by groups G06F1/1635 - G06F1/1675 the I/O peripheral being a sending/receiving arrangement to establish a cordless communication link, e.g. radio or infrared link, integrated cellular phone
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
- H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
- H01Q5/364—Creating multiple current paths
- H01Q5/371—Branching current paths
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
- H01Q9/0421—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with a shorting wall or a shorting pin at one end of the element
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
- H01Q9/045—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular feeding means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
- H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
Definitions
- This invention relates to an antenna, more particularly to a multifrequency inverted-F antenna for a portable electronic device.
- Wireless communication devices such as cellular phones, notebook computers, electronic appliances, and the like, are normally installed with an antenna that serves as a medium for transmission and reception of electromagnetic signals.
- the antenna can be built outside or inside the devices.
- the latter built-in type are more attractive due to a tendency of folding and breaking associated with the former upon use.
- FIG. 1 illustrates a conventional multifrequency Planar Inverted-F Antenna (PIFA) which includes a rectangular conductive radiating element 11 having opposite left and right ends, a rectangular conductive grounding element 12 that is vertically spaced apart from and that is electrically connected to the left end of the radiating element 11 through a conductive grounding leg 13 , and a conductive signal feeding element 14 that is electrically connected to one side of the radiating element 11 at a feeding point between the left and right ends of the radiating element 11 , that extends through an opening in the grounding element 12 , and that is adapted to be electrically connected to a radio frequency transceiver (not shown).
- PIFA Planar Inverted-F Antenna
- the length (L 1 ) measured from the left end of the radiating element 11 to the feeding point is different from the length (L 2 ) measured from the feeding point to the right end of the radiating element 11 so that two different frequency bands corresponding respectively to L 1 and L 2 (each length is about ⁇ /4, wherein ⁇ is the corresponding wavelength) can be emitted by the radiating element 11 when a signal is sent from the transceiver through the signal feeding element 14 to the radiating element 11 .
- FIG. 2 illustrates a conventional inverted-F antenna which is similar to the antenna shown in FIG. 1 , except that the radiating element 11 ′ is in the form of a wire.
- the antenna of this type can only resonate in a single frequency band.
- a multifrequency inverted-F antenna that comprises: a conductive radiating element extending in a longitudinal direction and having opposite first and second ends lying in the longitudinal direction; a conductive grounding element spaced apart from the radiating element in a transverse direction relative to the longitudinal direction; a conductive interconnecting element extending between the radiating and grounding elements and including first, second, and third parts, the first part being electrically connected to the radiating element at a feeding point between the first and second ends of the radiating element, the second part being offset from the first part in the longitudinal direction and being electrically connected to the grounding element, the third part electrically interconnecting the first and second parts; and a feeding line electrically connected to the interconnecting element.
- FIG. 1 is a perspective view of a conventional multifrequency planar inverted-F antenna
- FIG. 2 is a top view of another conventional inverted-F antenna
- FIG. 3 is a fragmentary schematic view of a first preferred embodiment of a multifrequency inverted-F antenna of this invention, which has a radiating element in the form of a wire;
- FIG. 4 is a schematic view to illustrate a signal path corresponding to a first frequency band from a grounding element to one end of the radiating element of the multifrequency inverted-F antenna of FIG. 3 ;
- FIG. 5 is a schematic view to illustrate another signal path corresponding to a second frequency band from the grounding element to an opposite end of the radiating element of the multifrequency inverted-F antenna of FIG. 3 ;
- FIG. 6 is a perspective view of a notebook computer with the multifrequency inverted-F antenna of FIG. 3 installed therein;
- FIG. 7 is a perspective view of a second preferred embodiment of the multifrequency inverted-F antenna of FIG. 3 , with the radiating element being in the form of a plate.
- FIGS. 3 to 5 illustrate a first preferred embodiment of a multifrequency inverted-F antenna 2 of this invention.
- the antenna 2 includes: a conductive radiating element 3 in the form of a wire that extends in a longitudinal direction and that has opposite first and second ends 31 , 32 lying in the longitudinal direction; a conductive grounding element 4 spaced apart from the radiating element 3 in a transverse direction relative to the longitudinal direction; a conductive interconnecting element 5 extending between the radiating and grounding elements 3 , 4 and including first, second, and third parts 51 , 52 , 53 , the first part 51 being electrically connected to the radiating element 3 at a feeding point (P) between the first and second ends 31 , 32 of the radiating element 3 , the second part 52 being offset from the first part 51 in the longitudinal direction and being electrically connected to the grounding element 4 , the third part 53 electrically interconnecting the first and second parts 51 , 52 ; and a feeding line 6 electrically connected to the interconnecting element 5 .
- P
- the first part 51 of the interconnecting element 5 has a radiating end 511 that is electrically connected to the radiating element 3 at the feeding point (P), and a distal end 512 that is opposite to the radiating end 511 .
- the second part 52 of the interconnecting element 5 has a grounding end 521 that is electrically connected to the grounding element 4 , and a distal end 522 that is opposite to the grounding end 521 .
- the third part 53 of the interconnecting element 5 has opposite left and right ends 531 , 532 electrically and respectively connected to the distal ends 512 , 522 of the first and second parts 51 , 52 .
- the first and third parts 51 , 53 form a first angle ( ⁇ 1 ), and the second and third parts 51 , 52 form a second angle ( ⁇ 2 ).
- Each of the first and second angles ( ⁇ 1 , ⁇ 2 ) can be varied. In this preferred embodiment, each of the first and second angles ( ⁇ 1 , ⁇ 2 ) is equal to 90°.
- the grounding element 4 is in the form of a plate, and preferably extends in a direction parallel to the radiating element 3 .
- the first and second parts 51 , 52 preferably extend in a direction perpendicular to the radiating and grounding elements 3 , 4 .
- the feeding line 6 is in the form of a coaxial cable line connected to a radio frequency transceiver (not shown), and includes a core conductor 61 that is electrically connected to the interconnecting element 5 .
- the core conductor 61 of the feeding line 6 is preferably connected to the third part 53 , and is more preferably connected to the left end 531 of the third part 53 of the interconnecting element 5 at one side face of the third part 53 that is opposite to the distal end 512 of the first part 51 of the interconnecting element 5 .
- the feeding line 6 further includes a grounding layer 62 that is electrically connected to the grounding element 4 .
- the feeding point (P) divides the radiating element 3 into left and right sections that have lengths (M 1 , M 2 ) measured respectively from the left end 31 of the radiating element 3 to the feeding point (P) and from the feeding point (P) to the right end 32 of the radiating element 3 .
- the left and right sections of the radiating element 3 correspond respectively to a high frequency band and a low frequency band.
- FIGS. 6 and 7 respectively illustrate signal paths that pass respectively through the first and second sections of the radiating element 3 when the radiating element 3 resonates at the corresponding frequency bands.
- the signal During transmission of a signal from the transceiver to the radiating element 3 , part of the signal may be transmitted to the grounding element 4 . However, due to hindrance of the second angle ( ⁇ 2 ), most of the signal will be transmitted to the radiating element 3 so as to permit emission of a radiation in the frequency bands.
- the signal passes through the respective section of the radiating element 3 and is first fed to the feeding line 6 through the first part 51 of the interconnecting element 5 prior to transmission to the grounding element 4 which is placed behind the feeding line 6 .
- part of the signal may be fed to the grounding element 4 , however, due to hindrance of the first and second angles ( ⁇ 1 , ⁇ 2 ), most of the signal will be fed to the feeding line 6 so as to be received by the transceiver.
- the core conductor 61 of the feeding line 6 can be connected to the third part 53 at a selected position between the left and right ends 531 , 532 of the third part 53 so as to obtain a desired frequency band and impedance matching for the input and output impedance.
- FIG. 7 illustrates a second preferred embodiment of the multifrequency inverted-F antenna 2 which has a construction similar to the antenna 2 shown in FIG. 3 , except that the radiating element 3 is in the form of a plate.
- the radiating element 3 is rectangular in shape and has a side edge 30 .
- the radiating end 511 of the first part 51 is connected to the side edge 30 .
- the side edge 30 of the radiating element 3 is formed with a groove 33 between the feeding point (P) and the second end 32 of the radiating element 3 so as to increase the length of the current path between the feeding point (P) and the second end 32 of the radiating element 3 and so as to minimize the dimension of the radiating element 3 in the longitudinal direction.
- FIG. 6 illustrates a portable electronic device, such as a notebook computer 7 , with the antenna 2 of FIG. 3 .
- the notebook computer 7 includes a main board module 70 and a display 71 that is connected to the main board module 70 and that has a display housing 710 and a display unit 711 mounted in the display housing 710 .
- the antenna 2 is mounted in the display housing 710 with the grounding element 4 being electrically connected to a back plate of the display unit 711 .
- Tables 1 and 2 are results of a test on the antenna 2 of FIG. 3 by measuring the voltage Standing Wave Ratio (VSWR) in a first frequency band ranging from 2.4 to 2.5 GHz (which is close to a frequency band 2.412 to 2.4835 GHz according to the specifications of wireless standards of IEEE 802.11b) and in a second frequency band ranging from 5.15 to 5.825 GHz (which is close to a frequency band 5.15 to 5.85 GHz according to the specifications of wireless standards of IEEE 802.11a).
- the VSWR value is an indication of the quality of the antenna, and is preferably less than 2 so as to prevent interference during transmission or reception of signals. Tables 1 and 2 show that the VSWR values for the tested frequency bands are less than 2, and that the antenna 2 is capable of providing multifrequency bands. TABLE 1 Frequency, 2.4 2.45 2.5 GHz VSWR 1.59 1.26 1.102
- the antenna 2 can be made from a flexible print circuit (FPC) material so as to further minimize the dimensions of the antenna 2 .
- FPC flexible print circuit
Abstract
A multifrequency inverted-F antenna includes a radiating element having opposite first and second ends, a grounding element spaced apart from the radiating element, and an interconnecting element extending between the radiating and grounding elements and including first, second, and third parts. The first part is connected to the radiating element at a feeding point between the first and second ends. The second part is offset from the first part in a longitudinal direction, and is connected to the grounding element. The third part interconnects the first and second parts. A feeding line is connected to the interconnecting element.
Description
- This application claims priority of Taiwan patent Application No. 091123215, filed on Oct. 8, 2002.
- 1. Field of the Invention
- This invention relates to an antenna, more particularly to a multifrequency inverted-F antenna for a portable electronic device.
- 2. Description of the Related Art
- Wireless communication devices, such as cellular phones, notebook computers, electronic appliances, and the like, are normally installed with an antenna that serves as a medium for transmission and reception of electromagnetic signals. The antenna can be built outside or inside the devices. However, the latter (built-in type) are more attractive due to a tendency of folding and breaking associated with the former upon use.
-
FIG. 1 illustrates a conventional multifrequency Planar Inverted-F Antenna (PIFA) which includes a rectangular conductiveradiating element 11 having opposite left and right ends, a rectangularconductive grounding element 12 that is vertically spaced apart from and that is electrically connected to the left end of theradiating element 11 through aconductive grounding leg 13, and a conductivesignal feeding element 14 that is electrically connected to one side of theradiating element 11 at a feeding point between the left and right ends of theradiating element 11, that extends through an opening in thegrounding element 12, and that is adapted to be electrically connected to a radio frequency transceiver (not shown). The length (L1) measured from the left end of theradiating element 11 to the feeding point is different from the length (L2) measured from the feeding point to the right end of theradiating element 11 so that two different frequency bands corresponding respectively to L1 and L2 (each length is about λ/4, wherein λ is the corresponding wavelength) can be emitted by theradiating element 11 when a signal is sent from the transceiver through thesignal feeding element 14 to theradiating element 11. -
FIG. 2 illustrates a conventional inverted-F antenna which is similar to the antenna shown inFIG. 1 , except that theradiating element 11′ is in the form of a wire. The antenna of this type can only resonate in a single frequency band. - In view of the conventional inverted-F antennas, there is a need for a simpler structure and construction for the antennas that are capable of emitting and receiving multifrequency bands. Moreover, adjustment of the frequency bands through the input and output impedance is not possible for the conventional inverted-F antennas due to the fixed location of the
signal feeding element 14 on theradiating element 11. - Therefore, it is an object of the present invention to provide a multifrequency inverted-F antenna that is capable of overcoming the aforementioned drawbacks of the prior art.
- According to this invention, there is provided a multifrequency inverted-F antenna that comprises: a conductive radiating element extending in a longitudinal direction and having opposite first and second ends lying in the longitudinal direction; a conductive grounding element spaced apart from the radiating element in a transverse direction relative to the longitudinal direction; a conductive interconnecting element extending between the radiating and grounding elements and including first, second, and third parts, the first part being electrically connected to the radiating element at a feeding point between the first and second ends of the radiating element, the second part being offset from the first part in the longitudinal direction and being electrically connected to the grounding element, the third part electrically interconnecting the first and second parts; and a feeding line electrically connected to the interconnecting element.
- In drawings which illustrate embodiments of the invention,
-
FIG. 1 is a perspective view of a conventional multifrequency planar inverted-F antenna; -
FIG. 2 is a top view of another conventional inverted-F antenna; -
FIG. 3 is a fragmentary schematic view of a first preferred embodiment of a multifrequency inverted-F antenna of this invention, which has a radiating element in the form of a wire; -
FIG. 4 is a schematic view to illustrate a signal path corresponding to a first frequency band from a grounding element to one end of the radiating element of the multifrequency inverted-F antenna ofFIG. 3 ; -
FIG. 5 is a schematic view to illustrate another signal path corresponding to a second frequency band from the grounding element to an opposite end of the radiating element of the multifrequency inverted-F antenna ofFIG. 3 ; -
FIG. 6 is a perspective view of a notebook computer with the multifrequency inverted-F antenna ofFIG. 3 installed therein; and -
FIG. 7 is a perspective view of a second preferred embodiment of the multifrequency inverted-F antenna ofFIG. 3 , with the radiating element being in the form of a plate. - For the sake of brevity, like elements are denoted by the same reference numerals throughout the disclosure.
- FIGS. 3 to 5 illustrate a first preferred embodiment of a multifrequency inverted-
F antenna 2 of this invention. Theantenna 2 includes: a conductiveradiating element 3 in the form of a wire that extends in a longitudinal direction and that has opposite first andsecond ends conductive grounding element 4 spaced apart from theradiating element 3 in a transverse direction relative to the longitudinal direction; a conductive interconnectingelement 5 extending between the radiating andgrounding elements third parts first part 51 being electrically connected to theradiating element 3 at a feeding point (P) between the first andsecond ends radiating element 3, thesecond part 52 being offset from thefirst part 51 in the longitudinal direction and being electrically connected to thegrounding element 4, thethird part 53 electrically interconnecting the first andsecond parts feeding line 6 electrically connected to the interconnectingelement 5. - The
first part 51 of the interconnectingelement 5 has aradiating end 511 that is electrically connected to theradiating element 3 at the feeding point (P), and adistal end 512 that is opposite to theradiating end 511. Thesecond part 52 of the interconnectingelement 5 has a groundingend 521 that is electrically connected to thegrounding element 4, and adistal end 522 that is opposite to thegrounding end 521. Thethird part 53 of the interconnectingelement 5 has opposite left andright ends distal ends second parts - The first and
third parts third parts - The
grounding element 4 is in the form of a plate, and preferably extends in a direction parallel to theradiating element 3. The first andsecond parts grounding elements - Preferably, the
feeding line 6 is in the form of a coaxial cable line connected to a radio frequency transceiver (not shown), and includes acore conductor 61 that is electrically connected to the interconnectingelement 5. Thecore conductor 61 of thefeeding line 6 is preferably connected to thethird part 53, and is more preferably connected to theleft end 531 of thethird part 53 of theinterconnecting element 5 at one side face of thethird part 53 that is opposite to thedistal end 512 of thefirst part 51 of the interconnectingelement 5. Thefeeding line 6 further includes agrounding layer 62 that is electrically connected to thegrounding element 4. - The feeding point (P) divides the
radiating element 3 into left and right sections that have lengths (M1, M2) measured respectively from theleft end 31 of theradiating element 3 to the feeding point (P) and from the feeding point (P) to theright end 32 of theradiating element 3. The left and right sections of theradiating element 3 correspond respectively to a high frequency band and a low frequency band.FIGS. 6 and 7 respectively illustrate signal paths that pass respectively through the first and second sections of theradiating element 3 when theradiating element 3 resonates at the corresponding frequency bands. - During transmission of a signal from the transceiver to the
radiating element 3, part of the signal may be transmitted to thegrounding element 4. However, due to hindrance of the second angle (θ2), most of the signal will be transmitted to theradiating element 3 so as to permit emission of a radiation in the frequency bands. During reception of a signal, the signal passes through the respective section of theradiating element 3 and is first fed to thefeeding line 6 through thefirst part 51 of the interconnectingelement 5 prior to transmission to thegrounding element 4 which is placed behind thefeeding line 6. Although part of the signal may be fed to thegrounding element 4, however, due to hindrance of the first and second angles (θ1, θ2), most of the signal will be fed to thefeeding line 6 so as to be received by the transceiver. - It is noted that it is not necessary to connect the
core conductor 61 of thefeeding line 6 to theleft end 531 of thethird part 53. Thecore conductor 61 can be connected to thethird part 53 at a selected position between the left andright ends third part 53 so as to obtain a desired frequency band and impedance matching for the input and output impedance. -
FIG. 7 illustrates a second preferred embodiment of the multifrequency inverted-F antenna 2 which has a construction similar to theantenna 2 shown inFIG. 3 , except that theradiating element 3 is in the form of a plate. Theradiating element 3 is rectangular in shape and has aside edge 30. Theradiating end 511 of thefirst part 51 is connected to theside edge 30. Theside edge 30 of theradiating element 3 is formed with agroove 33 between the feeding point (P) and thesecond end 32 of theradiating element 3 so as to increase the length of the current path between the feeding point (P) and thesecond end 32 of theradiating element 3 and so as to minimize the dimension of theradiating element 3 in the longitudinal direction. -
FIG. 6 illustrates a portable electronic device, such as anotebook computer 7, with theantenna 2 ofFIG. 3 . Thenotebook computer 7 includes amain board module 70 and adisplay 71 that is connected to themain board module 70 and that has adisplay housing 710 and adisplay unit 711 mounted in thedisplay housing 710. Theantenna 2 is mounted in thedisplay housing 710 with thegrounding element 4 being electrically connected to a back plate of thedisplay unit 711. - Tables 1 and 2 are results of a test on the
antenna 2 ofFIG. 3 by measuring the voltage Standing Wave Ratio (VSWR) in a first frequency band ranging from 2.4 to 2.5 GHz (which is close to a frequency band 2.412 to 2.4835 GHz according to the specifications of wireless standards of IEEE 802.11b) and in a second frequency band ranging from 5.15 to 5.825 GHz (which is close to a frequency band 5.15 to 5.85 GHz according to the specifications of wireless standards of IEEE 802.11a). The VSWR value is an indication of the quality of the antenna, and is preferably less than 2 so as to prevent interference during transmission or reception of signals. Tables 1 and 2 show that the VSWR values for the tested frequency bands are less than 2, and that theantenna 2 is capable of providing multifrequency bands.TABLE 1 Frequency, 2.4 2.45 2.5 GHz VSWR 1.59 1.26 1.102 -
TABLE 2 Frequency, 5.15 5.25 5.35 5.47 5.825 GHz VSWR 1.481 1.564 1.323 1.192 1.769 - In addition, the
antenna 2 can be made from a flexible print circuit (FPC) material so as to further minimize the dimensions of theantenna 2. - By virtue of the construction of the interconnecting
element 5, the drawbacks as encountered in the prior art can be eliminated. - With the invention thus explained, it is apparent that various modifications and variations can be made without departing from the spirit of the present invention.
Claims (13)
1-12. (canceled)
13. A multifrequency antenna comprising:
a radiation element having a first radiating section and a second radiating section, wherein said first radiating section and said second radiating section are connected at a first site;
a ground element;
an interconnection element connected to said first site of said radiation element and said grounding element; and
a feed line connected to said interconnection element.
14. The multifrequency antenna of claim 1, wherein said radiation element is in the form of a plate.
15. The multifrequency antenna of claim 2, wherein said first radiating unit of said radiation element comprises a recess at one side.
16. The multifrequency antenna of claim 2, wherein the surface of said radiation element is substantially perpendicular to said interconnection element.
17. The multifrequency antenna of claim 1, further comprising a substrate for carrying said radiation element and said interconnection element.
18. The multifrequency antenna of claim 5, wherein said ground element is disposed on said substrate.
19. The multifrequency antenna of claim 5, wherein said radiation element, said interconnection element, and said substrate from a flexible print circuit.
20. A portable electronic device comprising:
a main board module;
a display connected to said main board module having
a display housing and
a display unit wherein said display unit is mounted in said display housing;
an antenna having
a radiation element comprising a first radiating section and a second radiating section, wherein said first radiating section connects to said second radiating section at a first site,
a ground element and
an interconnection element in which said interconnection element interconnects said radiation element and said grounding element, and wherein said interconnection element of said antenna connects to said first site of said radiation element; and
a feed line connected to said interconnection element of said antenna and electrically connected to said main board module.
21. The portable electronic device of claim 8, wherein said ground element of said antenna electrically connects to a back plate of said display unit.
22. The portable electronic device of claim 8, where said antenna further comprising a substrate for carrying said radiation element and said interconnection element.
23. The portable electronic device of claim 10, wherein said ground element is disposed on said substrate.
24. The multifrequency antenna of claim 10, wherein said radiation element, said interconnection element, and said substrate from a flexible print circuit board.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US11/034,164 US20050116865A1 (en) | 2002-10-08 | 2005-01-11 | Multifrequency inverted-F antenna |
US11/482,253 US7298334B2 (en) | 2002-10-08 | 2006-07-07 | Multifrequency inverted-F antenna |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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TW091123215A TW563274B (en) | 2002-10-08 | 2002-10-08 | Dual-band antenna |
TW091123215 | 2002-10-08 | ||
US10/394,370 US6861986B2 (en) | 2002-10-08 | 2003-03-20 | Multifrequency inverted-F antenna |
US11/034,164 US20050116865A1 (en) | 2002-10-08 | 2005-01-11 | Multifrequency inverted-F antenna |
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US10/394,370 Continuation US6861986B2 (en) | 2002-10-08 | 2003-03-20 | Multifrequency inverted-F antenna |
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US11/482,253 Continuation US7298334B2 (en) | 2002-10-08 | 2006-07-07 | Multifrequency inverted-F antenna |
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US20050116865A1 true US20050116865A1 (en) | 2005-06-02 |
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US10/394,370 Expired - Lifetime US6861986B2 (en) | 2002-10-08 | 2003-03-20 | Multifrequency inverted-F antenna |
US11/034,164 Abandoned US20050116865A1 (en) | 2002-10-08 | 2005-01-11 | Multifrequency inverted-F antenna |
US11/482,253 Expired - Lifetime US7298334B2 (en) | 2002-10-08 | 2006-07-07 | Multifrequency inverted-F antenna |
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US10/394,370 Expired - Lifetime US6861986B2 (en) | 2002-10-08 | 2003-03-20 | Multifrequency inverted-F antenna |
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US11/482,253 Expired - Lifetime US7298334B2 (en) | 2002-10-08 | 2006-07-07 | Multifrequency inverted-F antenna |
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US (3) | US6861986B2 (en) |
TW (1) | TW563274B (en) |
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Also Published As
Publication number | Publication date |
---|---|
US6861986B2 (en) | 2005-03-01 |
US20060250309A1 (en) | 2006-11-09 |
TW563274B (en) | 2003-11-21 |
US7298334B2 (en) | 2007-11-20 |
US20040066334A1 (en) | 2004-04-08 |
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