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EP0117676A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Microwave filter

Assignee: ZF International UK Ltd
•
Filing: 1984-02-13
•
Granted: —
•
Expires: 2004-02-13
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Abstract

Abstract @ An electrical assembly comprises a board (13) mounted on the bottom wall of an aluminium box (10) and having an insulating layer (16) mounted on a conductive layer (17), a microstrip circuit (18,19,20) formed on the insulating layer (16), and a comb-line microwave filter which includes a set of resonant elements (22 to 25) extending form the conductive layer into a cavity (27). The element (22) is insulated from the conductive layer (17) and is connected to a point in the microstrip circuit. By providing the microstrip circuit and filter on a common board, no connected leads are needed. Other filters may be combined with a microstrip circuit in a similar manner.

Inventors

  • 👤 Michael Anthony Griffiths

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-07 21:10
CPC Classifications
H; H01; H01P; H01P3/00; H01P3/02; H01P3/08; H01P3/081; H01P1/00; H01P1/20

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 84 words
An electrical assembly including a board (13) formed from an insulating layer (16) mounted'on a conductive layer (17), a microstrip circuit (18,19,20) formed on the insulating layer (16), and a microwave filter, characterized in that the microwave filter includes a set of elements (22,23,24,25,) extending from the conductive layer (17) into at least one cavity (27) having conductive walls, at least one (22) of said elements being insulated from the conductive layer (17) and being connected to a point in the microstrip circuit (18,19,20).
Claim 2
Dependent Claim 84 words
An electrical assembly including a board (13) formed from an insulating layer (16) mounted'on a conductive layer (17), a microstrip circuit (18,19,20) formed on the insulating layer (16), and a microwave filter, characterized in that the microwave filter includes a set of elements (22,23,24,25,) extending from the conductive layer (17) into at least one cavity (27) having conductive walls, at least one (22) of said elements being insulated from the conductive layer (17) and being connected to a point in the microstrip circuit (18,19,20).
Claim 3
Dependent Claim 29 words
An electrical assembly as claimed in claim 1, characterized in that the elements (22,23,24,25,) are mounted in line in a single cavity so as to form a comb-line filter.
Claim 4
Dependent Claim 44 words
An electrical assembly as claimed in claim 2, characterized in that there are two elements (22,26) insulated from the conductive layer (17), one (22) of said two elements providing the input of the filter and the other (26) provding the output of the filter.
Claim 5
Dependent Claim 39 words
An electrical assembly as claimed in any one of the preceding claims characterized in that the board (13) is mounted on a wall inside a conductive box (10), said at least one cavity (27) being formed in said wall.

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