GB1469874A - Branching filter - Google Patents

Branching filter

Info

Publication number
GB1469874A
GB1469874A GB2895474A GB2895474A GB1469874A GB 1469874 A GB1469874 A GB 1469874A GB 2895474 A GB2895474 A GB 2895474A GB 2895474 A GB2895474 A GB 2895474A GB 1469874 A GB1469874 A GB 1469874A
Authority
GB
United Kingdom
Prior art keywords
resonator
coupling
circuited
resonators
june
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
GB2895474A
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.)
Thales SA
Original Assignee
Thomson CSF SA
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 Thomson CSF SA filed Critical Thomson CSF SA
Publication of GB1469874A publication Critical patent/GB1469874A/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
    • H01P1/213—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies
    • H01P1/2133—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies using coaxial filters
    • 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
    • H01P1/213—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies
    • H01P1/2138—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies using hollow waveguide filters

Landscapes

  • Control Of Motors That Do Not Use Commutators (AREA)
  • Networks Using Active Elements (AREA)

Abstract

1469874 Branching filters THOMSON-CSF 29 June 1974 [29 June 1973] 28954/74 Heading H1W A branching filter for metric and obimetric wave frequencies comprises a hybrid circuit 5 (e.g. a 3 db quadrature coupler) having one pair of conjugate ports 3, 4 respectively providing input and output, the other pair 1, 2 of conjugate ports being connected respectively to a resonator 6 in parallel with a short-circuited line 8 and to a similar resonator 7 is parallel with an open-circuited line 9. The lines 8, are of length d/8 (or an odd multiple thereof) where d is the wavelength of the frequency F 0 to which the resonators are tuned. The Specification contains a theoretical discussion of the insertion loss of the circuit at the centre passband frequency F 0 . As shown in Fig. 2, the conjugate ports 1, 2 of hybrid circuit 50 are coupled to respective cylindrical resonators 60, 70 by co-axial lines 81, 91 which extend beyond the resonators to provide short-circuited and open-circuited line sections 80, 90 each of length d/8. In each case, coupling to the resonator is provided by connecting the inner conductors of line sections 80, 81 and 90, 91 to the periphery of a conductive disc 25 supported by insulating posts from the base of the resonator. The capacitance of the coupling is increased by a plate 26 conductively connected to the base of the resonator. Adjustment of the coupling is provided by a telescopic probe 23, 24 extending through the tuning piston 22.
GB2895474A 1973-06-29 1974-06-28 Branching filter Expired GB1469874A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7324002A FR2235499B1 (en) 1973-06-29 1973-06-29

Publications (1)

Publication Number Publication Date
GB1469874A true GB1469874A (en) 1977-04-06

Family

ID=9121821

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2895474A Expired GB1469874A (en) 1973-06-29 1974-06-28 Branching filter

Country Status (6)

Country Link
US (1) US3891948A (en)
JP (1) JPS5723444B2 (en)
DE (1) DE2431278C2 (en)
FR (1) FR2235499B1 (en)
GB (1) GB1469874A (en)
NO (1) NO140447C (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4614920A (en) * 1984-05-28 1986-09-30 Com Dev Ltd. Waveguide manifold coupled multiplexer with triple mode filters
CA1246762A (en) * 1985-07-05 1988-12-13 Zenon Zakrzewski Surface wave launchers to produce plasma columns and means for producing plasma of different shapes
JPH0222336U (en) * 1988-07-29 1990-02-14

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2808573A (en) * 1952-09-18 1957-10-01 Du Mont Allen B Lab Inc Electrical filter
US2905902A (en) * 1957-08-12 1959-09-22 Malcolm W P Strandberg Microwave frequency discriminator
US3041542A (en) * 1959-03-12 1962-06-26 David L Bailey Broad-band discriminator system
US3277403A (en) * 1964-01-16 1966-10-04 Emerson Electric Co Microwave dual mode resonator apparatus for equalizing and compensating for non-linear phase angle or time delay characteristics of other components
DE1228322B (en) * 1964-07-21 1966-11-10 Siemens Ag Frequency-selective device for connecting a high-frequency source to a consumer
US3453638A (en) * 1966-03-22 1969-07-01 Communications Inc Multiplex package

Also Published As

Publication number Publication date
FR2235499A1 (en) 1975-01-24
FR2235499B1 (en) 1980-06-20
JPS5039446A (en) 1975-04-11
NO140447C (en) 1979-08-29
NO140447B (en) 1979-05-21
DE2431278A1 (en) 1975-01-16
DE2431278C2 (en) 1982-09-30
US3891948A (en) 1975-06-24
NO742370L (en) 1975-01-27
JPS5723444B2 (en) 1982-05-19

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19920628