WO1994019842A1 - Antenna system - Google Patents
Antenna system Download PDFInfo
- Publication number
- WO1994019842A1 WO1994019842A1 PCT/EP1994/000482 EP9400482W WO9419842A1 WO 1994019842 A1 WO1994019842 A1 WO 1994019842A1 EP 9400482 W EP9400482 W EP 9400482W WO 9419842 A1 WO9419842 A1 WO 9419842A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- antenna system
- antenna
- slot
- circuit board
- reception
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/10—Resonant slot antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/12—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave
- H01Q19/13—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave the primary radiating source being a single radiating element, e.g. a dipole, a slot, a waveguide termination
-
- 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
- H01Q1/247—Supports; Mounting means by structural association with other equipment or articles with receiving set with frequency mixer, e.g. for direct satellite reception or Doppler radar
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/10—Resonant slot antennas
- H01Q13/18—Resonant slot antennas the slot being backed by, or formed in boundary wall of, a resonant cavity ; Open cavity antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
Definitions
- the present invention relates to an antenna system according to the generic part of claim 1.
- Radiofrequency signals with frequency values above of some hundreds Megahertz, corresponding to wavelength less than about 50 centimeters, with the aid of a parabolic refelector and a feeder located at the focal point of said reflector.
- parabolic reflector e.g. a dielectric lens
- Antenna systems using dielectric lenses such as a Luneburg-type or a homogeneous-type lens, are known for example from the international publication WO 92/13373, where such a lens is used in conjunction with a helical antenna.
- the known kinds of feeders such as feeder horns and helical antennas, require waveguides or coaxial lines to lead the received signals to according electronic means, such as a low noise block (LNB).
- LNB low noise block
- Such a waveguide-solution is bulky and complicate.
- waveguide for the feed and microstrip for the LNB it is a quite expensive product.
- concentration means such as a dielectric lens antenna or a parabolic reflector
- LNB low noise block
- an antenna element for the reception of radiofrequency signals and especially for microwave signals is a slot antenna and is arranged on the same board as electronical means for processing the signals re ⁇ ceived by the antenna element.
- the invention has the advantage, comparing to existing microstrip arrays that there is less pattern disturbance by feeding circuits and that a better integration to the feed is possible by lower dimensions and by saving some components.
- the said antenna element it is preferred to give the said antenna element the shape of an annular slot. This has the advantages of a good polarisation diversity and of a wide frequency bandwidth coverage.
- the slot antenna is etched in the backside of the board used for the rear-positioned electronic means.
- This backside can be outside of the antenna area e.g. the conductor for ground.
- Fig. 1 shows a first embodiment using a parabolical reflector
- Fig. 2 shows an arrangement using a Luneburg-type lens
- Fig. 3 shows details of the feeder uesd in fig. 1 and 2
- Fig. 4-8 show different embodiments of feeders suitable for using in the embodiments of fig. 1 and fig. 2.
- Fig. 1 shows a parabolical reflector 10 which focusses an incoming radiation 11 at a focal point 10a where a low noise block (LNB) 12 is located having a housing 14 and a circuit board 13.
- the LNB 12 includes an integrated feed, which can also be called primary radiator and this feed will be explained in more detail later with the aid of fig. 3 to 8.
- the LNB 12 gives his signal, normally an intermediate frequency (IF) signal, to a broadcasting receiver, which is indicated by the block 9 and this receiver processes the said signal such that according audio, video and/or data signals are made available for a user or for further means to be controlled.
- IF intermediate frequency
- fig 2 there is a hemi-spherical Luneburg-type lens 20 used as focussing means which focusses the incoming radiation 11 at a focal point 20a.
- the refraction index of the lens 20 is such that the focal point 20a is located near, but outside of the lens-surface.
- the circuit board 13 is shown in more detail in fig. 3, including fig. 3a, which shows a side-view of the circuit board 13 along the axis A-A of fig. 3b, which shows a top- view of the circuit board 13.
- fig. 3a which shows a side-view of the circuit board 13 along the axis A-A of fig. 3b, which shows a top- view of the circuit board 13.
- a metallic plane 15 provided, which can be connected e.g. to ground. Inside this ground-plane 15 there is an annular slot 16 provided, which could been etched and which works as an annular slot antenna for the radiation focussed at the focal point 10a.
- a first microstrip line 17 provided with a stub 17a, which receives signals of a first polarization, e.g. horizontal.
- microstrip line 18 For the reception of a second polarisation, orthogonal to the first one, there is a second microstrip line 18 provided having an according stub 18a.
- the microstrip lines 17, 18 lead their signals to according inputs of rear-positioned electronical means of the LNB 12. These electronical means are positioned on the upper side of the board 13, but are not shown due to reasons of clearness.
- the dimensions and the shapes of the stubs 17a, 18a are optimized to achieve a wide frequency band width and a good isolation between the orthogonal polarizations.
- the board 13 is such provided that its broadside is directed to or around the center of the reflector 10 or of the lens 20, respectively and that the lower board-side 13a is nearer to the reflector 10 or the lens 20, respectively, than the upper board-side 13b. It may be mentioned that it is also possible to position the upper side 13b nearer to the reflector 10 or to the lens than the lower side 13a though this may effect pattern disturbances and a more difficult construction of the housing 14.
- a metal part 30 has a first foot-bridge 31, which is in electrical contact with the ring 19, and a second foot-bridge 32 with an isolation 33 at its lower end so that an electrical contact between the part 30 and the strip line 17 is avoided.
- the foot-bridges 31 ,32 build together with the according horizontal connection of the part 30 a cavity with a height H to the upper board-side 13b of about
- L is the wavelength of the radiation to be received. It may be mentioned that the dimensions in fig. 4 are such to explain this embodiment quite clearly. In reality the thickness of the board 13 and of the lines 17, 18, 19 etc. are much smaller than the height H. This means that the height of about L/4 is also nearly the distance between the annular slot and a point A.
- a first small perturbation segment 50 is provided at + 45 degrees and a second small perturbation segment 51 is provided at +225 degrees from the axis of the feeding point (microstrip line) 17.
- These segments 50, 51 are at the lower boardside 13a and correspond to a distortion of the annular slot 16.By these segments 50, 51 a RHCP is realized at the line 17.
- the perturbation segments 51 , 50 are arranged in about -45 degrees and -225 degrees respectively. Thereby the reception of LHCP is realized at line 18.
- a few annular slots e.g. four one 16a, 16b, 16c, 16d like shown in fig. 7, can be grouped in a small array, arranged in a certain way and fed with an adequate power distribution circuit, thus to achieve wider frequency band width and higher polarization performance.
- a common back cavity 30 ' can be used instead of individual cavities.
- focussing antenna parameters such as the ratio of the focal length F to the diameter D of the focussing means 10, 20 respectively:
- Another solution to achieve a specified illumination is to cover the single radiation element by a small dielectric lens having spherical, cylindrical, planar or any other shape with maintaining a small feed cross section.
- a small dielectric lens having spherical, cylindrical, planar or any other shape with maintaining a small feed cross section.
- Versions of the described embodiments may include at least one of the following variations: - Instead of an annular shape, the slot 16, 16a,... may have any other suitable shape, e.g. like shown in fig. 8.
- any material suitable for passing of the received wave 11 can be taken. Additionally or instead it is possible to provide an apperture in the area of the slots 16.
- the circuit board can be arranged at the end of a closed waveguide, with a distance between the end of this waveguide and of the circuit board of about L/4.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE69408303T DE69408303T2 (en) | 1993-02-28 | 1994-02-19 | ANTENNA SYSTEM |
JP51865294A JP3461827B2 (en) | 1993-02-28 | 1994-02-19 | Antenna device |
EP94908351A EP0686313B1 (en) | 1993-02-28 | 1994-02-19 | Antenna system |
KR1019950703636A KR100303384B1 (en) | 1993-02-28 | 1994-02-19 | Antenna system |
CA002156259A CA2156259C (en) | 1993-02-28 | 1994-02-19 | Antenna system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP93400507 | 1993-02-28 | ||
EP93400507.5 | 1993-02-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1994019842A1 true WO1994019842A1 (en) | 1994-09-01 |
Family
ID=8214686
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1994/000482 WO1994019842A1 (en) | 1993-02-28 | 1994-02-19 | Antenna system |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0686313B1 (en) |
JP (1) | JP3461827B2 (en) |
KR (1) | KR100303384B1 (en) |
CN (1) | CN1037882C (en) |
CA (1) | CA2156259C (en) |
DE (1) | DE69408303T2 (en) |
ES (1) | ES2113089T3 (en) |
WO (1) | WO1994019842A1 (en) |
ZA (1) | ZA941376B (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2725561A1 (en) * | 1994-10-10 | 1996-04-12 | Thomson Consumer Electronics | MULTI-SOURCE ANTENNA SYSTEM INTEGRATED WITH LOW NOISE FREQUENCY CONVERTER |
GB2304465A (en) * | 1993-03-17 | 1997-03-19 | Seiko Epson Corp | Slot antenna device |
DE19633147A1 (en) * | 1996-08-18 | 1998-02-19 | Pates Tech Patentverwertung | Multifocus reflector antenna |
WO1999063624A1 (en) * | 1998-06-02 | 1999-12-09 | Cambridge Industries Limited | Antenna feed and a reflector antenna system and a low noise (lnb) receiver, both with such an antenna feed |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2829301A1 (en) * | 2001-08-29 | 2003-03-07 | Thomson Licensing Sa | PLANAR, COMPACT, TWO-ACCESS ANTENNA AND TERMINAL COMPRISING SAME |
FR2858468A1 (en) | 2003-07-30 | 2005-02-04 | Thomson Licensing Sa | PLANAR ANTENNA WITH DIVERSITY OF RADIATION |
FR2861222A1 (en) * | 2003-10-17 | 2005-04-22 | Thomson Licensing Sa | Dual-band planar antenna for use in wireless mobile network, has outer and inner annular slots supplied by two common supply line that cuts across slots in directions of respective protrusions |
CN109524795A (en) * | 2018-11-22 | 2019-03-26 | 南京华讯方舟通信设备有限公司 | A kind of helical antenna of loaded medium lens |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3665480A (en) * | 1969-01-23 | 1972-05-23 | Raytheon Co | Annular slot antenna with stripline feed |
US4208660A (en) * | 1977-11-11 | 1980-06-17 | Raytheon Company | Radio frequency ring-shaped slot antenna |
DE3134122A1 (en) * | 1981-08-28 | 1983-03-17 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Antenna system with a dielectric |
US4929959A (en) * | 1988-03-08 | 1990-05-29 | Communications Satellite Corporation | Dual-polarized printed circuit antenna having its elements capacitively coupled to feedlines |
GB2242316A (en) * | 1990-03-22 | 1991-09-25 | Funai Electric Engineering Com | Patch type microstrip antenna for receiving vertically and/or horizontally polarized waves |
EP0528175A1 (en) * | 1991-08-20 | 1993-02-24 | Sumitomo Electric Industries, Ltd. | Antenna receiving apparatus |
-
1994
- 1994-02-19 JP JP51865294A patent/JP3461827B2/en not_active Expired - Fee Related
- 1994-02-19 CN CN94191319A patent/CN1037882C/en not_active Expired - Fee Related
- 1994-02-19 WO PCT/EP1994/000482 patent/WO1994019842A1/en active IP Right Grant
- 1994-02-19 CA CA002156259A patent/CA2156259C/en not_active Expired - Fee Related
- 1994-02-19 DE DE69408303T patent/DE69408303T2/en not_active Expired - Lifetime
- 1994-02-19 KR KR1019950703636A patent/KR100303384B1/en not_active IP Right Cessation
- 1994-02-19 ES ES94908351T patent/ES2113089T3/en not_active Expired - Lifetime
- 1994-02-19 EP EP94908351A patent/EP0686313B1/en not_active Expired - Lifetime
- 1994-02-28 ZA ZA941376A patent/ZA941376B/en unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3665480A (en) * | 1969-01-23 | 1972-05-23 | Raytheon Co | Annular slot antenna with stripline feed |
US4208660A (en) * | 1977-11-11 | 1980-06-17 | Raytheon Company | Radio frequency ring-shaped slot antenna |
DE3134122A1 (en) * | 1981-08-28 | 1983-03-17 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Antenna system with a dielectric |
US4929959A (en) * | 1988-03-08 | 1990-05-29 | Communications Satellite Corporation | Dual-polarized printed circuit antenna having its elements capacitively coupled to feedlines |
GB2242316A (en) * | 1990-03-22 | 1991-09-25 | Funai Electric Engineering Com | Patch type microstrip antenna for receiving vertically and/or horizontally polarized waves |
EP0528175A1 (en) * | 1991-08-20 | 1993-02-24 | Sumitomo Electric Industries, Ltd. | Antenna receiving apparatus |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2304465A (en) * | 1993-03-17 | 1997-03-19 | Seiko Epson Corp | Slot antenna device |
GB2304465B (en) * | 1993-03-17 | 1997-10-22 | Seiko Epson Corp | Slot antenna device |
FR2725561A1 (en) * | 1994-10-10 | 1996-04-12 | Thomson Consumer Electronics | MULTI-SOURCE ANTENNA SYSTEM INTEGRATED WITH LOW NOISE FREQUENCY CONVERTER |
EP0707357A1 (en) * | 1994-10-10 | 1996-04-17 | Wang, Pierre | Antenna system with multiple feeders integrated in a low noise converter (LNC) |
US6798386B1 (en) | 1994-10-10 | 2004-09-28 | Thomson Licensing, S.A. | System with multiple source antennas integrated with a low-noise frequency converter |
DE19633147A1 (en) * | 1996-08-18 | 1998-02-19 | Pates Tech Patentverwertung | Multifocus reflector antenna |
WO1999063624A1 (en) * | 1998-06-02 | 1999-12-09 | Cambridge Industries Limited | Antenna feed and a reflector antenna system and a low noise (lnb) receiver, both with such an antenna feed |
US6831612B2 (en) | 1998-06-02 | 2004-12-14 | Channel Master Limited | Antenna feed and a reflector antenna system and a low noise block (LNB) receiver, both with such an antenna feed |
Also Published As
Publication number | Publication date |
---|---|
CA2156259C (en) | 2004-10-26 |
JP3461827B2 (en) | 2003-10-27 |
ES2113089T3 (en) | 1998-04-16 |
EP0686313B1 (en) | 1998-01-28 |
ZA941376B (en) | 1994-09-27 |
CN1037882C (en) | 1998-03-25 |
KR100303384B1 (en) | 2001-11-22 |
CN1118636A (en) | 1996-03-13 |
KR960701493A (en) | 1996-02-24 |
DE69408303T2 (en) | 1998-06-10 |
JPH08509848A (en) | 1996-10-15 |
EP0686313A1 (en) | 1995-12-13 |
CA2156259A1 (en) | 1994-09-01 |
DE69408303D1 (en) | 1998-03-05 |
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