GB665747A - Improvements in radio aerials - Google Patents
Improvements in radio aerialsInfo
- Publication number
- GB665747A GB665747A GB162049A GB162049A GB665747A GB 665747 A GB665747 A GB 665747A GB 162049 A GB162049 A GB 162049A GB 162049 A GB162049 A GB 162049A GB 665747 A GB665747 A GB 665747A
- Authority
- GB
- United Kingdom
- Prior art keywords
- prism
- frequency
- medium
- metallic particles
- dispersive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/0013—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective
Abstract
665,747. Aerials. BRISTOW, H. M., and BUCKINGHAM, J. Jan. 20, 1950 [Jan. 20, 1949], No. 1620/49. Class 30 (vii). A scanning aerial system comprises a primary element 5 associated with a lens 7 made of a non-dispersive dielectric medium and a prism 10 made of material, the refractive index of which varies with frequency in the operating frequency band. By varying the frequency of radiation from the wave-guide flare 5, the directivity of the radiation emerging from the prism 10 may be varied. The frequency modulation may be effected by means of a small moving mechanical member or by means of a reactance valve so that very rapid scanning may be achieved. The lens and prism are constructed of artificial dielectric media comprising metallic particles distributed uniformly throughout a homogeneous dielectric of low refractive index. The metallic particles may comprise discs of zinc sprayed on to a sheet of insulating material; preferably, however, they comprise short strips 14, Fig. 4, of metal sprayed or stuck on to an insulating sheet. Several such sheets are stuck together to form a block of the artificial dielectric material. In the lens medium the metallic particles are of small size compared with the operating wavelength so that the medium is substantially non- dispersive. The prism material, however, comprises metallic particles having dimensions comparable with the operating wavelengths so that they are capable of acting as resonant half-wave dipoles over the operating band of frequencies, whereby the medium of the prism is dispersive, the refractive index thereof varying with frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB162049A GB665747A (en) | 1949-01-20 | 1949-01-20 | Improvements in radio aerials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB162049A GB665747A (en) | 1949-01-20 | 1949-01-20 | Improvements in radio aerials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB665747A true GB665747A (en) | 1952-01-30 |
Family
ID=9725096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB162049A Expired GB665747A (en) | 1949-01-20 | 1949-01-20 | Improvements in radio aerials |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB665747A (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2978702A (en) * | 1957-07-31 | 1961-04-04 | Arf Products | Antenna polarizer having two phase shifting medium |
| US3089142A (en) * | 1959-10-30 | 1963-05-07 | Sylvania Electric Prod | Artificial dielectric polarizer |
| US3359560A (en) * | 1962-08-17 | 1967-12-19 | Armstrong Cork Co | Cylindrical dielectric lens |
| US3430248A (en) * | 1966-01-06 | 1969-02-25 | Us Army | Artificial dielectric material for use in microwave optics |
| US4169268A (en) * | 1976-04-19 | 1979-09-25 | The United States Of America As Represented By The Secretary Of The Air Force | Metallic grating spatial filter for directional beam forming antenna |
| US4327364A (en) * | 1978-12-22 | 1982-04-27 | Rockwell International Corporation | Apparatus for converting incident microwave energy to thermal energy |
| US5325094A (en) * | 1986-11-25 | 1994-06-28 | Chomerics, Inc. | Electromagnetic energy absorbing structure |
| US5576710A (en) * | 1986-11-25 | 1996-11-19 | Chomerics, Inc. | Electromagnetic energy absorber |
| WO2009078807A1 (en) * | 2007-12-17 | 2009-06-25 | Em Technologies Group Pte Ltd | An artificial dielectric material and a method of manufacturing the same |
| US10418716B2 (en) | 2015-08-27 | 2019-09-17 | Commscope Technologies Llc | Lensed antennas for use in cellular and other communications systems |
| US10651546B2 (en) | 2016-01-19 | 2020-05-12 | Commscope Technologies Llc | Multi-beam antennas having lenses formed of a lightweight dielectric material |
| US11283186B2 (en) | 2016-03-25 | 2022-03-22 | Commscope Technologies Llc | Antennas having lenses formed of lightweight dielectric materials and related dielectric materials |
| US11431100B2 (en) | 2016-03-25 | 2022-08-30 | Commscope Technologies Llc | Antennas having lenses formed of lightweight dielectric materials and related dielectric materials |
| US11527835B2 (en) | 2017-09-15 | 2022-12-13 | Commscope Technologies Llc | Methods of preparing a composite dielectric material |
| CN116914438A (en) * | 2023-05-24 | 2023-10-20 | 广东福顺天际通信有限公司 | Deformable lens and antenna with deflectable beam direction |
-
1949
- 1949-01-20 GB GB162049A patent/GB665747A/en not_active Expired
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2978702A (en) * | 1957-07-31 | 1961-04-04 | Arf Products | Antenna polarizer having two phase shifting medium |
| US3089142A (en) * | 1959-10-30 | 1963-05-07 | Sylvania Electric Prod | Artificial dielectric polarizer |
| US3359560A (en) * | 1962-08-17 | 1967-12-19 | Armstrong Cork Co | Cylindrical dielectric lens |
| US3430248A (en) * | 1966-01-06 | 1969-02-25 | Us Army | Artificial dielectric material for use in microwave optics |
| US4169268A (en) * | 1976-04-19 | 1979-09-25 | The United States Of America As Represented By The Secretary Of The Air Force | Metallic grating spatial filter for directional beam forming antenna |
| US4327364A (en) * | 1978-12-22 | 1982-04-27 | Rockwell International Corporation | Apparatus for converting incident microwave energy to thermal energy |
| US5325094A (en) * | 1986-11-25 | 1994-06-28 | Chomerics, Inc. | Electromagnetic energy absorbing structure |
| US5576710A (en) * | 1986-11-25 | 1996-11-19 | Chomerics, Inc. | Electromagnetic energy absorber |
| WO2009078807A1 (en) * | 2007-12-17 | 2009-06-25 | Em Technologies Group Pte Ltd | An artificial dielectric material and a method of manufacturing the same |
| US8518537B2 (en) | 2007-12-17 | 2013-08-27 | Matsing Pte. Ltd. | Artificial dielectric material and method of manufacturing the same |
| US10418716B2 (en) | 2015-08-27 | 2019-09-17 | Commscope Technologies Llc | Lensed antennas for use in cellular and other communications systems |
| US10483650B1 (en) | 2015-08-27 | 2019-11-19 | Commscope Technologies Llc | Lensed antennas for use in cellular and other communications systems |
| US11264726B2 (en) | 2015-08-27 | 2022-03-01 | Commscope Technologies Llc | Lensed antennas for use in cellular and other communications systems |
| US10651546B2 (en) | 2016-01-19 | 2020-05-12 | Commscope Technologies Llc | Multi-beam antennas having lenses formed of a lightweight dielectric material |
| US11283186B2 (en) | 2016-03-25 | 2022-03-22 | Commscope Technologies Llc | Antennas having lenses formed of lightweight dielectric materials and related dielectric materials |
| US11431100B2 (en) | 2016-03-25 | 2022-08-30 | Commscope Technologies Llc | Antennas having lenses formed of lightweight dielectric materials and related dielectric materials |
| US11527835B2 (en) | 2017-09-15 | 2022-12-13 | Commscope Technologies Llc | Methods of preparing a composite dielectric material |
| CN116914438A (en) * | 2023-05-24 | 2023-10-20 | 广东福顺天际通信有限公司 | Deformable lens and antenna with deflectable beam direction |
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