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GB797397A - Improvements in and relating to low phase shift frequency sensitive filters - Google Patents

Improvements in and relating to low phase shift frequency sensitive filters

Info

Publication number
GB797397A
GB797397A GB1918055A GB1918055A GB797397A GB 797397 A GB797397 A GB 797397A GB 1918055 A GB1918055 A GB 1918055A GB 1918055 A GB1918055 A GB 1918055A GB 797397 A GB797397 A GB 797397A
Authority
GB
United Kingdom
Prior art keywords
series
phase shift
frequencies
low phase
resonant
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
GB1918055A
Inventor
Edward Kenneth Sandeman
Harold Aspden
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.)
English Electric Co Ltd
Original Assignee
English Electric Co 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 English Electric Co Ltd filed Critical English Electric Co Ltd
Priority to GB1918055A priority Critical patent/GB797397A/en
Publication of GB797397A publication Critical patent/GB797397A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/17—Structural details of sub-circuits of frequency selective networks
    • H03H7/1741—Comprising typical LC combinations, irrespective of presence and location of additional resistors
    • H03H7/1783—Combined LC in series path
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/06—Frequency selective two-port networks including resistors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/17—Structural details of sub-circuits of frequency selective networks
    • H03H7/1741—Comprising typical LC combinations, irrespective of presence and location of additional resistors
    • H03H7/1791—Combined LC in shunt or branch path

Landscapes

  • Radar Systems Or Details Thereof (AREA)

Abstract

797,397. Filter networks. ENGLISH ELECTRIC CO., Ltd. July 1, 1955, No. 19180/55. Drawings to Specification. Class 40 (8). In a filter network having a low phase shift in a pass range of frequencies and comprising a series-resonant and a parallel-resonant circuit in series, the parameters are selected so that over a pass range of frequencies the reactances of the two circuits compensate each other. These embodiments are described, in the first of which the series and parallel circuits resonate at the same frequency while in the second, in addition to the reactance compensation, the reactances of the series and resonant circuits are each zero at the compensation frequency. In a third embodiment, a further parallel resonant circuit is connected across the seriesparallel arrangement and specific bands of frequencies are rejected. The circuit may be applied in frequency doubling arrangements in Doppler radar systems.
GB1918055A 1955-07-01 1955-07-01 Improvements in and relating to low phase shift frequency sensitive filters Expired GB797397A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1918055A GB797397A (en) 1955-07-01 1955-07-01 Improvements in and relating to low phase shift frequency sensitive filters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1918055A GB797397A (en) 1955-07-01 1955-07-01 Improvements in and relating to low phase shift frequency sensitive filters

Publications (1)

Publication Number Publication Date
GB797397A true GB797397A (en) 1958-07-02

Family

ID=10125077

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1918055A Expired GB797397A (en) 1955-07-01 1955-07-01 Improvements in and relating to low phase shift frequency sensitive filters

Country Status (1)

Country Link
GB (1) GB797397A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4395688A (en) 1981-08-11 1983-07-26 Harris Corporation Linear phase filter with self-equalized group delay

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4395688A (en) 1981-08-11 1983-07-26 Harris Corporation Linear phase filter with self-equalized group delay

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