GB1387028A - Microwave devices - Google Patents

Microwave devices

Info

Publication number
GB1387028A
GB1387028A GB1910872A GB1910872A GB1387028A GB 1387028 A GB1387028 A GB 1387028A GB 1910872 A GB1910872 A GB 1910872A GB 1910872 A GB1910872 A GB 1910872A GB 1387028 A GB1387028 A GB 1387028A
Authority
GB
United Kingdom
Prior art keywords
height
irises
waveguides
array
band
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
GB1910872A
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.)
Ferranti International PLC
Original Assignee
Ferranti 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 Ferranti PLC filed Critical Ferranti PLC
Priority to GB1910872A priority Critical patent/GB1387028A/en
Publication of GB1387028A publication Critical patent/GB1387028A/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
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/207—Hollow waveguide filters
    • H01P1/208—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure

Abstract

1387028 Waveguide filters FERRANTI Ltd 24 April 1973 [25 April 1972] 19108/72 Heading H1W A bandstop filter for a waveguide transmission system comprises an array of identical resonant circuits. As shown, the array is made up of a number of apertured plates or irises, all the apertures having the same width a equal to the width of waveguides 18. Each resonant circuit comprises an iris 12 of height l bounded by two irises 11 of height c where l>c and c<b (the height of the waveguides 18). In addition, two end irises 13 of height m, where m is the mean of band c, forms impedance-matching elements between the array and the waveguides. The resonant circuits are tuned to a harmonic band of the desired pass band of the system, and where it is desired to attenuate more than one harmonic band, a number of arrays with different values of l are used. An iris 11 between resonators in different arrays may be stepped to provide two apertures each appropriate to the adjacent resonant circuit. Alternatively, a single aperture of constant height corresponding to the mean of the two admittances may be used. In a filter designed to attenuate 2fo and 3fo, the part effective at 2fo may be divided into two portions located one on either side of the part effective at 3fo.
GB1910872A 1972-04-25 1972-04-25 Microwave devices Expired GB1387028A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1910872A GB1387028A (en) 1972-04-25 1972-04-25 Microwave devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1910872A GB1387028A (en) 1972-04-25 1972-04-25 Microwave devices

Publications (1)

Publication Number Publication Date
GB1387028A true GB1387028A (en) 1975-03-12

Family

ID=10123912

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1910872A Expired GB1387028A (en) 1972-04-25 1972-04-25 Microwave devices

Country Status (1)

Country Link
GB (1) GB1387028A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2388478A (en) * 2002-03-14 2003-11-12 Ma Com Inc Surface mountable microwave filter and method of making same
CN102709659A (en) * 2012-06-19 2012-10-03 成都赛纳赛德科技有限公司 Rectangular-waveguide impedance transducer
CN103117435A (en) * 2011-11-17 2013-05-22 成都赛纳赛德科技有限公司 Narrow band double-module filter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2388478A (en) * 2002-03-14 2003-11-12 Ma Com Inc Surface mountable microwave filter and method of making same
GB2388478B (en) * 2002-03-14 2005-08-10 Ma Com Inc Surface mountable microwave filter configuration and method of fabricating same
CN103117435A (en) * 2011-11-17 2013-05-22 成都赛纳赛德科技有限公司 Narrow band double-module filter
CN102709659A (en) * 2012-06-19 2012-10-03 成都赛纳赛德科技有限公司 Rectangular-waveguide impedance transducer

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Legal Events

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