GB577939A - Improvements in the directive propagation of electro-magnetic waves - Google Patents
Improvements in the directive propagation of electro-magnetic wavesInfo
- Publication number
- GB577939A GB577939A GB718641A GB718641A GB577939A GB 577939 A GB577939 A GB 577939A GB 718641 A GB718641 A GB 718641A GB 718641 A GB718641 A GB 718641A GB 577939 A GB577939 A GB 577939A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reflector
- elliptical
- radiation
- bac
- dipole
- 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
- H01Q19/18—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 having two or more spaced reflecting surfaces
- H01Q19/19—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 having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface
- H01Q19/191—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 having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface wherein the primary active element uses one or more deflecting surfaces, e.g. beam waveguide feeds
Landscapes
- Aerials With Secondary Devices (AREA)
Abstract
577,939. Directive wireless signalling. DOWSETT, H. M. June 6, 1941, No. 7186. [Class 40 (v)] A beam of rotational symmetry about the axis of a dipole AOB is produced by an elliptical or spherical-elliptical reflector bac having its main focus O at the centre of the dipole and conjugate foci in a ring P centred on the main axis, the radiation from these foci being reflected by the surface de of an inverted cone reflector on the main axis. The generator of the cone may be straight as in Fig. 2, or of parabolic form, Figs. 3 and 4 (not shown), the surface curvature of the cone causing the radiation to be reflected in each axial plane at the required angle of divergence. The dipole and elliptical reflector may be underground, and the conical reflector above ground. The spherical part ba of the reflector bac reflects part of the radiation back through the focus O so that it is in phase with the part of the radiation falling on the elliptical part ac of another part of the reflector riot shown in Fig. 2, which shows' only a half-section of the reflector. The upper part of the reflector bac may be elliptical and the lower part spherical as in Figs. 3 and 4 (not shown).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB718641A GB577939A (en) | 1941-06-06 | 1941-06-06 | Improvements in the directive propagation of electro-magnetic waves |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB718641A GB577939A (en) | 1941-06-06 | 1941-06-06 | Improvements in the directive propagation of electro-magnetic waves |
Publications (1)
Publication Number | Publication Date |
---|---|
GB577939A true GB577939A (en) | 1946-06-06 |
Family
ID=9828259
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB718641A Expired GB577939A (en) | 1941-06-06 | 1941-06-06 | Improvements in the directive propagation of electro-magnetic waves |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB577939A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2825063A (en) * | 1953-11-20 | 1958-02-25 | Roy C Spencer | Double parabolic cylinder pencil beam antenna |
US3222676A (en) * | 1961-09-29 | 1965-12-07 | Bell Telephone Labor Inc | Rotatable parabolic reflector with closed waveguide horn feed |
US3332083A (en) * | 1963-06-14 | 1967-07-18 | Csf | Cassegrain antenna with offset feed |
US3365720A (en) * | 1961-12-21 | 1968-01-23 | Keltec Ind Inc | Combined hyperbolic and parabolic double reflector |
US3633209A (en) * | 1968-09-06 | 1972-01-04 | Mostafa S Afifi | Offset paraboloid-plane reflector antenna |
EP0102686A2 (en) * | 1982-05-31 | 1984-03-14 | Fujitsu Limited | Device for distributing and/or combining microwave electric power |
GB2155245A (en) * | 1984-02-29 | 1985-09-18 | Standard Telephones Cables Ltd | Antenna systems |
US4588962A (en) * | 1982-05-31 | 1986-05-13 | Fujitsu Limited | Device for distributing and combining microwave electric power |
-
1941
- 1941-06-06 GB GB718641A patent/GB577939A/en not_active Expired
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2825063A (en) * | 1953-11-20 | 1958-02-25 | Roy C Spencer | Double parabolic cylinder pencil beam antenna |
US3222676A (en) * | 1961-09-29 | 1965-12-07 | Bell Telephone Labor Inc | Rotatable parabolic reflector with closed waveguide horn feed |
US3365720A (en) * | 1961-12-21 | 1968-01-23 | Keltec Ind Inc | Combined hyperbolic and parabolic double reflector |
US3332083A (en) * | 1963-06-14 | 1967-07-18 | Csf | Cassegrain antenna with offset feed |
US3633209A (en) * | 1968-09-06 | 1972-01-04 | Mostafa S Afifi | Offset paraboloid-plane reflector antenna |
EP0102686A2 (en) * | 1982-05-31 | 1984-03-14 | Fujitsu Limited | Device for distributing and/or combining microwave electric power |
EP0102686A3 (en) * | 1982-05-31 | 1985-08-07 | Fujitsu Limited | Device for distributing and/or combining microwave electric power |
US4588962A (en) * | 1982-05-31 | 1986-05-13 | Fujitsu Limited | Device for distributing and combining microwave electric power |
GB2155245A (en) * | 1984-02-29 | 1985-09-18 | Standard Telephones Cables Ltd | Antenna systems |
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