GB9014536D0 - Spiral antenna - Google Patents

Spiral antenna

Info

Publication number
GB9014536D0
GB9014536D0 GB909014536A GB9014536A GB9014536D0 GB 9014536 D0 GB9014536 D0 GB 9014536D0 GB 909014536 A GB909014536 A GB 909014536A GB 9014536 A GB9014536 A GB 9014536A GB 9014536 D0 GB9014536 D0 GB 9014536D0
Authority
GB
United Kingdom
Prior art keywords
spiral antenna
antenna
spiral
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.)
Granted
Application number
GB909014536A
Other versions
GB2234859A (en
GB2234859B (en
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.)
ERA Patents Ltd
Original Assignee
ERA Patents 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 ERA Patents Ltd filed Critical ERA Patents Ltd
Publication of GB9014536D0 publication Critical patent/GB9014536D0/en
Publication of GB2234859A publication Critical patent/GB2234859A/en
Application granted granted Critical
Publication of GB2234859B publication Critical patent/GB2234859B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/26—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength
    • H01Q9/27—Spiral antennas
GB9014536A 1989-06-30 1990-06-29 Spiral antenna Expired - Fee Related GB2234859B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB898915047A GB8915047D0 (en) 1989-06-30 1989-06-30 Spiral antenna

Publications (3)

Publication Number Publication Date
GB9014536D0 true GB9014536D0 (en) 1990-08-22
GB2234859A GB2234859A (en) 1991-02-13
GB2234859B GB2234859B (en) 1993-10-20

Family

ID=10659331

Family Applications (2)

Application Number Title Priority Date Filing Date
GB898915047A Pending GB8915047D0 (en) 1989-06-30 1989-06-30 Spiral antenna
GB9014536A Expired - Fee Related GB2234859B (en) 1989-06-30 1990-06-29 Spiral antenna

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB898915047A Pending GB8915047D0 (en) 1989-06-30 1989-06-30 Spiral antenna

Country Status (1)

Country Link
GB (2) GB8915047D0 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0606514A1 (en) * 1993-01-15 1994-07-20 Rolan Wu Microstrip element phase-shift array antenna
US5668514A (en) * 1994-10-12 1997-09-16 Dai Nippon Printing Co., Ltd. Signal transmission device
EP0707388B1 (en) * 1994-10-12 2005-12-07 Dai Nippon Printing Co., Ltd. Signal transmission device using a fixed and a rotatable body

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1204929A (en) * 1968-02-23 1970-09-09 Gen Electric & English Elect Improvements in or relating to aerials
US3656168A (en) * 1971-05-25 1972-04-11 North American Rockwell Spiral antenna with overlapping turns
US4114164A (en) * 1976-12-17 1978-09-12 Transco Products, Inc. Broadband spiral antenna
FR2387526A2 (en) * 1977-01-25 1978-11-10 Fellus Marcel IMPLANTABLE ELECTRICAL AND ELECTROMAGNETIC DEVICE FOR MEDICAL USE
US4525720A (en) * 1982-10-15 1985-06-25 The United States Of America As Represented By The Secretary Of The Navy Integrated spiral antenna and printed circuit balun
US4675690A (en) * 1984-05-25 1987-06-23 Revlon, Inc. Conical spiral antenna
US4636802A (en) * 1984-10-29 1987-01-13 E-Systems, Inc. Electrical connector for spiral antenna and resistive/capacitive contact therefor
GB2176057B (en) * 1985-05-17 1989-11-15 Marconi Co Ltd Radar antenna array

Also Published As

Publication number Publication date
GB2234859A (en) 1991-02-13
GB2234859B (en) 1993-10-20
GB8915047D0 (en) 1989-08-23

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19940629