GB487708A - Improvements in or relating to aerial and feeder systems - Google Patents
Improvements in or relating to aerial and feeder systemsInfo
- Publication number
- GB487708A GB487708A GB8116/37D GB811637D GB487708A GB 487708 A GB487708 A GB 487708A GB 8116/37 D GB8116/37 D GB 8116/37D GB 811637 D GB811637 D GB 811637D GB 487708 A GB487708 A GB 487708A
- Authority
- GB
- United Kingdom
- Prior art keywords
- feeders
- wavelength
- conductors
- fed
- radiating
- 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
- 239000004020 conductor Substances 0.000 abstract 10
- 230000005540 biological transmission Effects 0.000 abstract 4
- 238000003491 array Methods 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 230000011664 signaling Effects 0.000 abstract 1
- 125000006850 spacer group Chemical group 0.000 abstract 1
Classifications
-
- 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
- H01Q21/26—Turnstile or like antennas comprising arrangements of three or more elongated elements disposed radially and symmetrically in a horizontal plane about a common centre
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/20—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a curvilinear path
- H01Q21/205—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a curvilinear path providing an omnidirectional coverage
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Details Of Aerials (AREA)
Abstract
487,708. Aerial; directive wireless signalling. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. March 19, 1937, No. 8116. Convention date, April 28, 1936. [Class 40 (v)] An antenna system comprises a pair of halfwavelength conductors making an angle of 60 with each other and excited so that they have opposite instantaneous polarities at corresponding points. In a modified arrangement three half-wavelength conductors are arranged in an equilateral triangle and excited so that adjacent ends have opposite instantaneous polarities. Several arrays are described involving two or more such triangles and means are provided for matching the feeders with the radiators and with the main transmission line. Fig. 4 shows triangular systems fed by a series circuit. Alternatively the three feeder pairs may be fed in parallel. The feeder pairs terminate at their lower ends in half-wavelength loops A<1>, B<1>, C<1> and the point at which the transmission line is connected to a loop is chosen to match the line to the feeder system. Similar loops A<11>, B<11>, C<11>, A<111>, B<111>, C<111> may be provided as shown in Fig. 5 for matching the feeders to the radiating wires. In the arrangement shown in Fig. 4, in which the sets are half a wavelength apart vertically, corresponding ends of successive radiating wires are connected to different ones of a pair of feeder wires. They may be connected to the same feeder by spacing them one wavelength apart or, as shown in Fig. 6, by arranging cross connections 17 at each side of transverse metallic spacers connected conductively to the feeders at voltage nodes. In another arrangement, Fig. 7 (not shown), the radiating conductors are fed at points between their ends chosen from the point of view of impedance matching. Because of the abrupt change in load impedance as the feeders pass the level of each radiating system, corresponding abrupt changes may be made in the dimensions of the feeders. Adjacent feeders of the same or different pairs may be connected together at the top by loops which act as inductances and so modify to some extent the natural frequency of the radiating conductors. In a further modification, Fig. 10, braces are arranged as shown at each level, the bracing members being welded, riveted or otherwise rigidly secured together at their intersections. There may be secured at these points of intersection, which are points of zero potential, further feeders for other antenna systems, observation instruments, &c. Only the middle triangle is fed directly from the transmission line 46, the connection being effected by coaxial feeders, the outer conductors of which serve to couple the middle with the lower triangle. The upper triangle is similarly coupled by extensions of the outer conductors. For impedance matching reasons, for the last quarter wavelength, the ratio of the diameters of the outer and inner conductors of the coaxial feeders is increased. For a similar reason, the feeders are fed from the main transmission line 46 in series instead of in parallel, appropriate phase relations between the feeders of a pair being obtained by means of U-shaped sections 37, 42, 43. The paired feeders are fed by three single feeders 40, 44, 45, the shell of 40 being connected to the core of 44 and so on. Two of the three feeders are surrounded by a shell 47 for a quarter-wavelength. The paired feeders may feed the same radiating conductor or different ones. Fig. 12 shows a matching circuit for associating separate push-pull transmitters, e.g. for sound and television. The filter system shown in the rectangle 53 is for preventing energy from one transmitter from entering the circuits of the other and forms no part of the invention. The coaxial pairs 63, 64 from one transmitter are associated with the main line by connecting the separate cores to the shell and core respectively of a quarter wavelength coaxial line 61 connected to the main line, and connecting the shells of the separate pairs 63, 64 to a quarter-wavelength sleeve surrounding the line 61. Both inner and outer conductors of the section connecting 61 to the filter may be tapered so as to give a neat appearance while keeping the diametrical ratios of the conductor, and therefore the surge impedance, constant.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US76745A US2131108A (en) | 1936-04-28 | 1936-04-28 | Short wave communication system |
Publications (1)
Publication Number | Publication Date |
---|---|
GB487708A true GB487708A (en) | 1938-06-24 |
Family
ID=22133916
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8116/37D Expired GB487708A (en) | 1936-04-28 | 1937-03-19 | Improvements in or relating to aerial and feeder systems |
Country Status (4)
Country | Link |
---|---|
US (1) | US2131108A (en) |
BE (1) | BE421257A (en) |
FR (1) | FR820782A (en) |
GB (1) | GB487708A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE758471C (en) * | 1939-05-23 | 1953-10-19 | Telefunken Gmbh | Antenna arrangement |
EP0352160A1 (en) * | 1988-07-22 | 1990-01-24 | Thomcast | Omnidirectional antenna, particularly for the transmission of radio or television signals in the decimetric-wave range, and radiation system formed by an arrangement of these antennas |
US5204688A (en) * | 1988-07-22 | 1993-04-20 | Thomson-Lgt Laboratoire General Des Telecommunications | Omnidirectional antenna notably for the emission of radio or television broadcasting signals in the decimetric waveband, and radiating system formed by a grouping of these antennas |
GB2235337B (en) * | 1989-08-24 | 1994-05-11 | Phase Track Limited | Loop antenna |
Families Citing this family (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2419855A (en) * | 1939-06-22 | 1947-04-29 | Roosenstein Hans Otto | Arrangement adapted to suppress radio frequency currents on conductors |
US2249963A (en) * | 1939-11-15 | 1941-07-22 | Rca Corp | Impedance transformation means |
BE452813A (en) * | 1942-10-22 | |||
US2419552A (en) * | 1943-06-12 | 1947-04-29 | Standard Telephones Cables Ltd | Radio antenna |
US2583953A (en) * | 1946-03-29 | 1952-01-29 | John D Kraus | Electrical apparatus |
US2624000A (en) * | 1946-05-03 | 1952-12-30 | Rca Corp | Antenna system |
US2546322A (en) * | 1948-04-14 | 1951-03-27 | Bell Telephone Labor Inc | Balanced to unbalanced coupling |
US2637533A (en) * | 1949-09-24 | 1953-05-05 | Andrew Corp | Multi-v fm antenna |
USRE23960E (en) * | 1950-05-12 | 1955-03-08 | lorusso | |
US2566287A (en) * | 1950-09-16 | 1951-08-28 | Jr Lewis H Finneburgh | Television antenna system |
US2825061A (en) * | 1951-11-21 | 1958-02-25 | Gabriel Co | Wave radiator |
US2860341A (en) * | 1953-10-07 | 1958-11-11 | Itt | Ultra high frequency television antenna |
US3007164A (en) * | 1955-04-22 | 1961-10-31 | Ross A Davis | Slot antenna which is fed at two points |
US3268899A (en) * | 1964-04-23 | 1966-08-23 | James D Walden | Cylindrical tube antenna with matching transmission line |
US20110001677A1 (en) * | 2009-07-02 | 2011-01-06 | Richard Strnad | Stereo fed digital antenna |
AU2019239864B2 (en) | 2018-03-19 | 2023-02-02 | Pivotal Commware, Inc. | Communication of wireless signals through physical barriers |
US10862545B2 (en) | 2018-07-30 | 2020-12-08 | Pivotal Commware, Inc. | Distributed antenna networks for wireless communication by wireless devices |
US10522897B1 (en) | 2019-02-05 | 2019-12-31 | Pivotal Commware, Inc. | Thermal compensation for a holographic beam forming antenna |
US10468767B1 (en) | 2019-02-20 | 2019-11-05 | Pivotal Commware, Inc. | Switchable patch antenna |
US10734736B1 (en) | 2020-01-03 | 2020-08-04 | Pivotal Commware, Inc. | Dual polarization patch antenna system |
US11069975B1 (en) | 2020-04-13 | 2021-07-20 | Pivotal Commware, Inc. | Aimable beam antenna system |
WO2021242996A1 (en) | 2020-05-27 | 2021-12-02 | Pivotal Commware, Inc. | Rf signal repeater device management for 5g wireless networks |
US11026055B1 (en) | 2020-08-03 | 2021-06-01 | Pivotal Commware, Inc. | Wireless communication network management for user devices based on real time mapping |
WO2022056024A1 (en) | 2020-09-08 | 2022-03-17 | Pivotal Commware, Inc. | Installation and activation of rf communication devices for wireless networks |
WO2022155529A1 (en) | 2021-01-15 | 2022-07-21 | Pivotal Commware, Inc. | Installation of repeaters for a millimeter wave communications network |
KR20230150811A (en) | 2021-01-26 | 2023-10-31 | 피보탈 컴웨어 인코포레이티드 | Smart repeater systems |
US11451287B1 (en) | 2021-03-16 | 2022-09-20 | Pivotal Commware, Inc. | Multipath filtering for wireless RF signals |
JP2024525621A (en) | 2021-07-07 | 2024-07-12 | ピヴォタル コムウェア インコーポレイテッド | Multi-path repeater system |
US11937199B2 (en) | 2022-04-18 | 2024-03-19 | Pivotal Commware, Inc. | Time-division-duplex repeaters with global navigation satellite system timing recovery |
-
0
- BE BE421257D patent/BE421257A/xx unknown
-
1936
- 1936-04-28 US US76745A patent/US2131108A/en not_active Expired - Lifetime
-
1937
- 1937-03-19 GB GB8116/37D patent/GB487708A/en not_active Expired
- 1937-04-14 FR FR820782D patent/FR820782A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE758471C (en) * | 1939-05-23 | 1953-10-19 | Telefunken Gmbh | Antenna arrangement |
EP0352160A1 (en) * | 1988-07-22 | 1990-01-24 | Thomcast | Omnidirectional antenna, particularly for the transmission of radio or television signals in the decimetric-wave range, and radiation system formed by an arrangement of these antennas |
FR2634598A1 (en) * | 1988-07-22 | 1990-01-26 | Thomson Lgt | OMNIDIRECTIONAL ANTENNA, IN PARTICULAR FOR THE TRANSMISSION OF BROADCAST OR TELEVISION SIGNALS IN THE DECIMETRIC WAVE BAND, AND RADIANT SYSTEM FORMED IN A GROUP OF THESE ANTENNAS |
US5204688A (en) * | 1988-07-22 | 1993-04-20 | Thomson-Lgt Laboratoire General Des Telecommunications | Omnidirectional antenna notably for the emission of radio or television broadcasting signals in the decimetric waveband, and radiating system formed by a grouping of these antennas |
GB2235337B (en) * | 1989-08-24 | 1994-05-11 | Phase Track Limited | Loop antenna |
Also Published As
Publication number | Publication date |
---|---|
BE421257A (en) | |
FR820782A (en) | 1937-11-18 |
US2131108A (en) | 1938-09-27 |
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