GB606926A - Improvements in directive antenna systems - Google Patents
Improvements in directive antenna systemsInfo
- Publication number
- GB606926A GB606926A GB2085/46A GB208546A GB606926A GB 606926 A GB606926 A GB 606926A GB 2085/46 A GB2085/46 A GB 2085/46A GB 208546 A GB208546 A GB 208546A GB 606926 A GB606926 A GB 606926A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reflector
- vertical
- horizontal
- axis
- directive
- 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
- 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
Landscapes
- Aerials With Secondary Devices (AREA)
Abstract
606,926. Directive radio systems. WESTERN ELECTRIC CO., Inc. Jan. 22, 1946, No. 2085. Convention date, Jan. 24, 1945. [Class 40 (vii)] A directive aerial system comprises a concave reflector with a primary aerial mounted near the focus and a deflector extending parallel to the axis of the reflector and located between the primary aerial and the reflector whereby the shadow effect of the primary aerial is reduced. The invention is described as an improvement on that disclosed in Specification 574,610, which shows a switched overlapping-lobe aerial suitable for a radar system comprising a concave reflector formed as a surface of revolution about a horizontal axis 14 and a pair of vertical wave-guides 3 and 4 extending partly across the reflector with radiating apertures 6 and 7 facing the reflector. The apertures are covered by a double polystyrene window 8 and are connected to a transceiver 1 through a switch 5 which renders the guides alternately operative. In such a system, secondary lobes of appreciable magnitude are formed due to the shadow effect of the waveguide feed and in order to reduce this effect a small horizontal flat metallic deflector plate 9 with a circular front edge extending outwardly a distance of #/2 is attached to the wave-guides just below the apertures so that most of the energy radiated downwards from the apertures, e.g. along directions 31 and 32, Fig. 1, is deflected towards the upper portion of the reflector, the radiation reflected by that portion of the reflector facing the wave-guide feed being then reduced. Preferably, the reflector comprises two sections, the upper paraboloidal section 12 being formed by revolving the parabola 18, Fig. 1, about the axis 14 and the section being cut so that the horizontal dimension of the aperture is greater than the vertical giving a curved aperture of elliptical shape, Figs. 2 and 3, which produces a fan-beam which is highly directive in the horizontal plane and less directive in the vertical plane. The lower section 13 is conical shaped; alternatively, it may be barrel-shaped being formed by revolving the bottom edge 19, Fig. 1, of the paraboloid through a small angle about the axis 16, Fig. 2, or it may comprise an extension of the paraboloid 12. The reflector extends above and below the axis 14 distances B and A respectively and B is preferably equal to twice A so that the plane of the aperture 22 is inclined to the vertical. The lower section of the reflector is a continuous surface, but the upper section is a grille composed of horizontal metallic strips 23 having a depth D, Fig. 1, and vertical spacing V, Fig. 2, of about one inch corresponding to less than #/2 at the operating wavelength of 9.8 cms. The strips are supported by transverse members 25 and a rim member 26 which may be of conductive or non-conductive material since the reflector is designed for use with horizontally polarized waves which are not affected by the vertical transverse members. Figs. 5 and 6 (not shown) illustrate the improved horizontal and vertical polar diagrams produced by the arrangement of the present invention compared with that produced by the arrangement disclosed in Specification 574,610, Fig. 4 (not shown).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US606926XA | 1945-01-24 | 1945-01-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB606926A true GB606926A (en) | 1948-08-23 |
Family
ID=22031169
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2085/46A Expired GB606926A (en) | 1945-01-24 | 1946-01-22 | Improvements in directive antenna systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB606926A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2245103A (en) * | 1990-04-09 | 1991-12-18 | Marconi Electronic Devices | Antenna with reflectors supported by a waveguide |
USD1013806S1 (en) | 2022-06-14 | 2024-02-06 | GORUCK Holdings, LLC | Weighted plate |
US12053080B2 (en) | 2020-10-22 | 2024-08-06 | GORUCK Holdings, LLC | Rucking article |
-
1946
- 1946-01-22 GB GB2085/46A patent/GB606926A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2245103A (en) * | 1990-04-09 | 1991-12-18 | Marconi Electronic Devices | Antenna with reflectors supported by a waveguide |
US12053080B2 (en) | 2020-10-22 | 2024-08-06 | GORUCK Holdings, LLC | Rucking article |
USD1013806S1 (en) | 2022-06-14 | 2024-02-06 | GORUCK Holdings, LLC | Weighted plate |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2422184A (en) | Directional microwave antenna | |
GB595893A (en) | Improvements in antenna systems | |
US2416675A (en) | Horn antenna system | |
GB650767A (en) | Lens for radio waves | |
US2556087A (en) | Directive antenna system | |
US2489865A (en) | Directional microwave antenna | |
US2767396A (en) | Directive antenna systems | |
US2597391A (en) | Antenna | |
US2549143A (en) | Microwave broadcast antenna | |
US3631502A (en) | Corrugated horn antenna | |
US2717312A (en) | Radio beam antenna arrangements | |
US2594871A (en) | Antenna | |
GB606926A (en) | Improvements in directive antenna systems | |
US2483575A (en) | Directional microwave antenna | |
US2512147A (en) | Antenna | |
CN107069225B (en) | Cassegrain antenna feed source structure and Cassegrain antenna | |
US2846680A (en) | Directive antennas | |
US3212095A (en) | Low side lobe pillbox antenna employing open-ended baffles | |
US2600274A (en) | Antenna | |
US2597313A (en) | Antenna | |
US2644092A (en) | Antenna | |
US2495219A (en) | Directional antenna system | |
US3267477A (en) | Dual frequency microwave antenna | |
US2526675A (en) | Antenna structure | |
US2555123A (en) | Directional antenna |