GB650041A - Improvements in or relating to antennae or radiators for electromagnetic waves - Google Patents

Improvements in or relating to antennae or radiators for electromagnetic waves

Info

Publication number
GB650041A
GB650041A GB21714/47A GB2171447A GB650041A GB 650041 A GB650041 A GB 650041A GB 21714/47 A GB21714/47 A GB 21714/47A GB 2171447 A GB2171447 A GB 2171447A GB 650041 A GB650041 A GB 650041A
Authority
GB
United Kingdom
Prior art keywords
helix
helices
radiation
turns
feeder
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
GB21714/47A
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.)
Sperry Gyroscope Co Inc
Original Assignee
Sperry Gyroscope Co Inc
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 Sperry Gyroscope Co Inc filed Critical Sperry Gyroscope Co Inc
Publication of GB650041A publication Critical patent/GB650041A/en
Expired legal-status Critical Current

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
    • H01Q11/08—Helical antennas

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

650,041. Aerials. SPERRY GYROSCOPE CO., Inc. Aug. 7, 1947, No. 21714. Convention date, Sept. 6, 1943. [Class 40 (vii)] An ultra high-frequency antenna comprises two equal lengths of conductor 11, 11<SP>1</SP>, each formed into a helix, the pair of helices being supplied at one end, one in one phase and the other in the reverse phase, from a two-conductor feeder 17, 18 and the helices being arranged in side-by-side formation with their axes parallel. Each helix turns in the same (clockwise or counter clockwise) direction and has the same number of turns. The ends 21, 22 remote from the feeder are terminated in an impedance 23 selected to produce travelling waves in the helices. In order that the radiation from each element of the conductors should be additive in the direction of propagation 24, the pitch P and radius of curvature r of each helix are selected to satisfy the equation Suitable dimensions are Since rotational symmetry exists with respect to the helix axes parallel to the direction of radiation, the radiated wave is circularly polarized.
GB21714/47A 1943-09-06 1947-08-07 Improvements in or relating to antennae or radiators for electromagnetic waves Expired GB650041A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US501370A US2482767A (en) 1943-09-06 1943-09-06 Broad band antenna

Publications (1)

Publication Number Publication Date
GB650041A true GB650041A (en) 1951-02-14

Family

ID=23993275

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21714/47A Expired GB650041A (en) 1943-09-06 1947-08-07 Improvements in or relating to antennae or radiators for electromagnetic waves

Country Status (2)

Country Link
US (1) US2482767A (en)
GB (1) GB650041A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2034170A1 (en) * 1969-02-17 1970-12-11 Thomson Csf
GB2246910A (en) * 1990-08-02 1992-02-12 Polytechnic Electronics Plc Antenna

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2575377A (en) * 1945-11-13 1951-11-20 Robert J Wohl Short wave antenna
US2640928A (en) * 1949-12-24 1953-06-02 Int Standard Electric Corp Circularly polarized broad band antenna
US2663869A (en) * 1950-07-07 1953-12-22 Adcock Mack Donald Helical antenna scanning system
US3083364A (en) * 1958-07-23 1963-03-26 Andrew Corp Bifilar wound quarter-wave helical antenna having broadside radiation
US3417403A (en) * 1965-11-18 1968-12-17 Collins Radio Co Electrically small spiral antenna tunable over a wide band
US6225963B1 (en) * 1981-12-11 2001-05-01 Mcdonnell Douglas Corporation Cloverleaf spiral antenna and array
BE1007669A3 (en) * 1993-10-25 1995-09-12 Philips Electronics Nv Antenna and wireless telecommunication device containing an antenna.
US5841407A (en) * 1996-10-11 1998-11-24 Acs Wireless, Inc. Multiple-tuned normal-mode helical antenna
US6078298A (en) * 1998-10-26 2000-06-20 Terk Technologies Corporation Di-pole wide bandwidth antenna
JP4221878B2 (en) * 2000-01-25 2009-02-12 ソニー株式会社 Antenna device
JP4650536B2 (en) * 2008-07-28 2011-03-16 ソニー株式会社 Electric field coupler, communication apparatus, communication system, and method of manufacturing electric field coupler.

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1435009A (en) * 1920-04-10 1922-11-07 T tt tttt t
GB223706A (en) * 1923-09-17 1924-10-30 Wilson Ramsden Gothard Improvements in frame aerials for wireless reception
US1684009A (en) * 1926-05-29 1928-09-11 Harold M Brown Antenna
US1892151A (en) * 1929-04-18 1932-12-27 Wired Radio Inc Direction finding system
FR719837A (en) * 1930-10-13 1932-02-10 Telefunken Gmbh Improvements to directional shortwave antennas
US1999258A (en) * 1933-07-27 1935-04-30 Rca Corp Directional aerial
US2153589A (en) * 1936-05-19 1939-04-11 Rca Corp Antenna
US2291450A (en) * 1939-12-28 1942-07-28 Hazeltine Corp Antenna system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2034170A1 (en) * 1969-02-17 1970-12-11 Thomson Csf
GB2246910A (en) * 1990-08-02 1992-02-12 Polytechnic Electronics Plc Antenna
US5191352A (en) * 1990-08-02 1993-03-02 Navstar Limited Radio frequency apparatus
GB2246910B (en) * 1990-08-02 1994-12-14 Polytechnic Electronics Plc A radio frequency antenna

Also Published As

Publication number Publication date
US2482767A (en) 1949-09-27

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