GB587543A - Improvements in antenna systems - Google Patents
Improvements in antenna systemsInfo
- Publication number
- GB587543A GB587543A GB12506/44A GB1250644A GB587543A GB 587543 A GB587543 A GB 587543A GB 12506/44 A GB12506/44 A GB 12506/44A GB 1250644 A GB1250644 A GB 1250644A GB 587543 A GB587543 A GB 587543A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wires
- rhombic
- aerial
- apex
- sections
- 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
- H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
- H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
- H01Q11/06—Rhombic antennas; V-antennas
Landscapes
- Details Of Aerials (AREA)
Abstract
587,543. Aerials. PRESS WIRELESS, Inc. June 30, 1944, No. 12506. Convention date, June 15, 1943. [Glaas 40 (v)] The terminating impedance of a rhombictype aerial used primarily for transmission is constituted by a similar rhombic-type section mounted beneath the radiating section and connected to it by a transmission, line. As shown in the Figure, the aerial comprises a radiating rhombus 1 of copper wires energized from the transmitter 11 through the transmission line 12 and mounted on poles about 100 ft. above the ground over a dissipating rhombic section 2 to which it is connected by the transmission line 16, 22, corresponding wires of the two sections being in the same vertical plane. Due to its ctose proximity to the ground, the lower section has a high attenuation which may be increased by forming it of stainless steel wire and the near apex 26 may be earthed directly or through a resistance equal to the characteristic impedance Zo of the system. Alternatively, the two legs 18, 24 may be bridged near the apex 26 with a resistance equal to Zo having an adjustable earthing point, Fig. 6 (not shown), or the apex 26 may be connected to a two-wire transmission line of high attenuation which may be terminated, in a further network of spaced wires at a place where the ground-induced resistance is more favourable, Fig. 7 (not shown). The legs of the sections may be given an exponential instead of a linear separation to obtain impedance matching, Fig. 5 (not shown). The planes of the two rhombic sections may be inclined towards each other to modify the directivity of the aerial, Figs. 8 and 9 (not shown). Details of the supports are illustrated in Figs. 2-4 (not shown). The Specification as open to inspection under Sect. 91 describes a single rhombic aerial in which impedance matching is obtained by forming each radiating conductor of two diverging wires, the plane of each pair of wires being at an angle to the vertical. This subjectmatter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US490844A US2379260A (en) | 1943-06-15 | 1943-06-15 | Antenna system |
Publications (1)
Publication Number | Publication Date |
---|---|
GB587543A true GB587543A (en) | 1947-04-29 |
Family
ID=23949707
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB12506/44A Expired GB587543A (en) | 1943-06-15 | 1944-06-30 | Improvements in antenna systems |
Country Status (2)
Country | Link |
---|---|
US (1) | US2379260A (en) |
GB (1) | GB587543A (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE452813A (en) * | 1942-10-22 | |||
US2985877A (en) * | 1954-08-30 | 1961-05-23 | John Rolind Holloway | Directive antenna system |
DE1025464B (en) * | 1956-06-22 | 1958-03-06 | Siemens Ag | Rhombus antenna |
US3202996A (en) * | 1962-12-26 | 1965-08-24 | Control Data Corp | Log-periodic rhombic antenna array |
-
1943
- 1943-06-15 US US490844A patent/US2379260A/en not_active Expired - Lifetime
-
1944
- 1944-06-30 GB GB12506/44A patent/GB587543A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2379260A (en) | 1945-06-26 |
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