GB799172A - Unidirectional waveguide attenuator - Google Patents

Unidirectional waveguide attenuator

Info

Publication number
GB799172A
GB799172A GB29077/56A GB2907756A GB799172A GB 799172 A GB799172 A GB 799172A GB 29077/56 A GB29077/56 A GB 29077/56A GB 2907756 A GB2907756 A GB 2907756A GB 799172 A GB799172 A GB 799172A
Authority
GB
United Kingdom
Prior art keywords
strip
stub
line
conductor
ground plane
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
GB29077/56A
Inventor
Leonard Lewin
George Horace Brooke Thompson
Francois Sagnard
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB799172A publication Critical patent/GB799172A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/32—Non-reciprocal transmission devices
    • H01P1/36—Isolators
    • H01P1/365—Resonance absorption isolators

Abstract

799,172. Non-reciprocal attenuators. STANDARD TELEPHONES & CABLES, Ltd. Sept. 24, 1956, No. 29077/56. Class 40 (8). A uni-directional attenuator comprises a main waveguide, e.g. of the strip-line or coaxial type, and its sub which are both adapted for the propagation of an approximate T.E.M. mode and are coupled together to produce a circularly polarized magnetic field. A static magnetic field is applied to some ferromagnetic ceramic material, e.g. nickel-zinc ferrite, located within the circularly polarized region to condition it for gyromagnetic resonance. In one form the guide comprises a strip-like conductor 1, 1<SP>1</SP>, a ground plane conductor 4 and a dielectric 3 which extends between them. A strip-line stub 5 includes a strip-like conductor 5 which extends at 90 degrees from, and is integral and coplanar with, the main guide. The stub also incorporates the same dielectric and ground plane sheeting as the main guide. The ferrite 6 is inserted in a hole drilled through the ground plane, dielectric and strip conductors. An auxiliary strip-line stub 9, symmetrically opposite stub 5, may be used to improve the matching. Polepieces 7, 8 (not shown) provide the static field. The strip-line waveguide may alternatively be of the sandwich form.
GB29077/56A 1956-09-24 1956-09-24 Unidirectional waveguide attenuator Expired GB799172A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB351310X 1956-09-24

Publications (1)

Publication Number Publication Date
GB799172A true GB799172A (en) 1958-08-06

Family

ID=10374190

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29077/56A Expired GB799172A (en) 1956-09-24 1956-09-24 Unidirectional waveguide attenuator

Country Status (6)

Country Link
US (1) US2985851A (en)
BE (1) BE561047A (en)
CH (1) CH351310A (en)
DE (1) DE1038138B (en)
FR (1) FR75174E (en)
GB (1) GB799172A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2338014A1 (en) * 1972-07-26 1974-02-07 Mitsubishi Electric Corp INSULATOR

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3680006A (en) * 1970-08-21 1972-07-25 Addington Lab Inc Microwave isolator
US4568945A (en) * 1984-06-15 1986-02-04 Winegard Company Satellite dish antenna apparatus
US4766443A (en) * 1984-06-15 1988-08-23 Winegard Company Satellite dish antenna apparatus

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2767379A (en) * 1954-04-14 1956-10-16 Bell Telephone Labor Inc Electromagnetic wave equalization
US2922125A (en) * 1954-10-20 1960-01-19 Bell Telephone Labor Inc Nonreciprocal single crystal ferrite devices
BE542392A (en) * 1954-10-29
US2892161A (en) * 1955-01-31 1959-06-23 Bell Telephone Labor Inc Nonreciprocal circuit element

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2338014A1 (en) * 1972-07-26 1974-02-07 Mitsubishi Electric Corp INSULATOR
DE2366544C2 (en) * 1972-07-26 1984-09-13 Mitsubishi Denki K.K., Tokio/Tokyo INSULATOR

Also Published As

Publication number Publication date
BE561047A (en)
FR75174E (en) 1961-09-08
CH351310A (en) 1961-01-15
US2985851A (en) 1961-05-23
DE1038138B (en) 1958-09-04

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