GB527988A - High frequency wave transmission systems - Google Patents
High frequency wave transmission systemsInfo
- Publication number
- GB527988A GB527988A GB12403/39A GB1240339A GB527988A GB 527988 A GB527988 A GB 527988A GB 12403/39 A GB12403/39 A GB 12403/39A GB 1240339 A GB1240339 A GB 1240339A GB 527988 A GB527988 A GB 527988A
- Authority
- GB
- United Kingdom
- Prior art keywords
- line
- aerial
- blocking device
- cap
- limb
- 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
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/0123—Frequency selective two-port networks comprising distributed impedance elements together with lumped impedance elements
-
- 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
- H01Q21/08—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a rectilinear path
- H01Q21/12—Parallel arrangements of substantially straight elongated conductive units
Landscapes
- Details Of Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
527,988. Wireless signalling; aerials. STANDARD TELEPHONES & CABLES, Ltd. April 25, 1939, No. 12403. Convention date, April 28, 1938. [Classes 40 (iii) and 40 (v)] A " blocking device " or coil-less resonator, to prevent the leakage of high-frequency energy along an aerial feeder or other transmission line, consists of two sliding parts which are tuned to act as a rejector circuit by adjusting the distance between them. The device serves to confine the spread of high-frequency energy, without breaking the electric continuity of the line to which it is attached. It is used to maintain the symmetry of the field radiated from a beacon transmitter of the overlapping-beam type, or of a " beam " array of aerials. whilst allowing the effective length of the aerial to be varied if necessary. As shown in Fig. 1, high-frequency energy is fed through the coaxial line 3 to the centre of the dipole 1, the current in the two parts of the line being in phase-opposition and spreading upwards along the limb A of the aerial and downwards along the limb B. The blocking device 5 prevents the energy in the lower limb from leaking past the cap 6. It also helps to remedy any lack of balance in the push-pull energy supplied through feed-line. As shown in Fig. 4, it consists of a cap portion 6 and a body portion 7, both of which can be adjusted relatively to each other by means of screws 8. The two parts enclose a toroidal cavity 9 simulating inductance, which is tuned in combination with the capacity between the cap 6 and flange 10 to act as a rejector circuit to the carrier wave. Two or more such devices may be arranged in cascade on the same feed line. Fig. 2 shows a beam transmitter comprising a main dipole 4 and two reflectors 21, 31 controlled by keying relays 22, 32, the blocking device being shown at 7 on the feed line 3. In Fig. 3 the resonators 7 are arranged at the junction point 11 of the feeders 3, 31 for an aerial beam array and also near each of the radiating elements 1, 1<SP>1</SP>.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US204735A US2236102A (en) | 1938-04-28 | 1938-04-28 | High frequency wave transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB527988A true GB527988A (en) | 1940-10-21 |
Family
ID=22759211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB12403/39A Expired GB527988A (en) | 1938-04-28 | 1939-04-25 | High frequency wave transmission systems |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2236102A (en) |
| BE (1) | BE434031A (en) |
| FR (1) | FR853438A (en) |
| GB (1) | GB527988A (en) |
| NL (1) | NL61755C (en) |
Families Citing this family (12)
| 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 |
| US2613319A (en) * | 1950-03-18 | 1952-10-07 | Westinghouse Electric Corp | Adjustable antenna |
| BE503384A (en) * | 1950-05-20 | |||
| US2669695A (en) * | 1952-09-23 | 1954-02-16 | Breeze Corp | High attenuation shielded lead structure |
| NL206130A (en) * | 1955-05-26 | |||
| US3393384A (en) * | 1964-08-28 | 1968-07-16 | Nasa Usa | Radio frequency coaxial high pass filter |
| US7911402B2 (en) * | 2008-03-05 | 2011-03-22 | Ethertronics, Inc. | Antenna and method for steering antenna beam direction |
| US9917359B2 (en) | 2008-03-05 | 2018-03-13 | Ethertronics, Inc. | Repeater with multimode antenna |
| US9748637B2 (en) | 2008-03-05 | 2017-08-29 | Ethertronics, Inc. | Antenna and method for steering antenna beam direction for wifi applications |
| US9761940B2 (en) | 2008-03-05 | 2017-09-12 | Ethertronics, Inc. | Modal adaptive antenna using reference signal LTE protocol |
| US10033097B2 (en) | 2008-03-05 | 2018-07-24 | Ethertronics, Inc. | Integrated antenna beam steering system |
| US20140087781A1 (en) | 2012-09-18 | 2014-03-27 | Laurent Desclos | Wireless communication system & related methods for use in a social network |
-
0
- NL NL61755D patent/NL61755C/xx active
- FR FR853438D patent/FR853438A/fr not_active Expired
- BE BE434031D patent/BE434031A/xx unknown
-
1938
- 1938-04-28 US US204735A patent/US2236102A/en not_active Expired - Lifetime
-
1939
- 1939-04-25 GB GB12403/39A patent/GB527988A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE434031A (en) | |
| FR853438A (en) | 1940-03-19 |
| US2236102A (en) | 1941-03-25 |
| NL61755C (en) |
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