GB544499A - Improvements in directive antennae - Google Patents

Improvements in directive antennae

Info

Publication number
GB544499A
GB544499A GB16806/40A GB1680640A GB544499A GB 544499 A GB544499 A GB 544499A GB 16806/40 A GB16806/40 A GB 16806/40A GB 1680640 A GB1680640 A GB 1680640A GB 544499 A GB544499 A GB 544499A
Authority
GB
United Kingdom
Prior art keywords
focus
wire
nov
wave
differ
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
GB16806/40A
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
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 Marconis Wireless Telegraph Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Publication of GB544499A publication Critical patent/GB544499A/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

Abstract

544,499. Directive wireless signalling. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Nov. 22, 1940, No. 16806. Convention date, Nov. 22, 1939. [Class 40 (v)] A long radiating wire is arranged at the focus of a cylindrical parabolic reflector with changing focal radius for every half wave length distance along the wire so that the reflected radiation from the wire adds in an in-phase relationship in a plane wave front perpendicular to the direction of radiation. An antenna array is shown in end view in Fig. 1 and in section in Fig. 2. The radiating element 3 is several wave lengths long and is located at the focus of a parabolic reflector 4, which consists of alternate portions 5, 6 having radii which so differ that the difference between paths from the focus via the alternate reflecting surfaces to a common plane wave front differ by half the length of the operating wave, or odd multiples thereof.
GB16806/40A 1939-11-22 1940-11-22 Improvements in directive antennae Expired GB544499A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US305572A US2271300A (en) 1939-11-22 1939-11-22 Directive antenna

Publications (1)

Publication Number Publication Date
GB544499A true GB544499A (en) 1942-04-15

Family

ID=23181347

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16806/40A Expired GB544499A (en) 1939-11-22 1940-11-22 Improvements in directive antennae

Country Status (2)

Country Link
US (1) US2271300A (en)
GB (1) GB544499A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2438343A (en) * 1942-07-09 1948-03-23 Westinghouse Electric Corp High-frequency radiation system
US2622242A (en) * 1945-05-09 1952-12-16 Freedman Samuel Tuned microwave reflector
US2709252A (en) * 1948-08-20 1955-05-24 Gilfillan Bros Inc Multi-plane tracking in ground controlled approach system
US2688732A (en) * 1949-05-05 1954-09-07 Bell Telephone Labor Inc Wave guide
US3199103A (en) * 1959-08-12 1965-08-03 Bendix Corp Displacement detector

Also Published As

Publication number Publication date
US2271300A (en) 1942-01-27

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