GB577939A - Improvements in the directive propagation of electro-magnetic waves - Google Patents

Improvements in the directive propagation of electro-magnetic waves

Info

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
Application number
GB718641A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB718641A priority Critical patent/GB577939A/en
Publication of GB577939A publication Critical patent/GB577939A/en
Expired legal-status Critical Current

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

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).
GB718641A 1941-06-06 1941-06-06 Improvements in the directive propagation of electro-magnetic waves Expired GB577939A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (9)

* Cited by examiner, † Cited by third party
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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