GB1389126A - Bandpass filter - Google Patents

Bandpass filter

Info

Publication number
GB1389126A
GB1389126A GB3923072A GB3923072A GB1389126A GB 1389126 A GB1389126 A GB 1389126A GB 3923072 A GB3923072 A GB 3923072A GB 3923072 A GB3923072 A GB 3923072A GB 1389126 A GB1389126 A GB 1389126A
Authority
GB
United Kingdom
Prior art keywords
coupling
filter
sections
conductors
magnetic
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
GB3923072A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries 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
Priority claimed from DE19712142748 external-priority patent/DE2142748C3/en
Application filed by Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1389126A publication Critical patent/GB1389126A/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
    • H01P1/215—Frequency-selective devices, e.g. filters using ferromagnetic material
    • H01P1/218—Frequency-selective devices, e.g. filters using ferromagnetic material the ferromagnetic material acting as a frequency selective coupling element, e.g. YIG-filters

Landscapes

  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

1389126 Band-pass filters PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 23 Aug 1972 [26 Aug 1971] 39230/72 Heading H1W A bandpass filter comprises input and output lines coupled by ferrimagnetic resonance in YIG elements and also by electro-magnetic coupling whereby a frequency characteristic having attenuation poles may be obtained. As shown, inner-conductors 2 of input and output co-axial lines are connected to conductor 8 of a strip line. The conductors 2 are spaced from and run at right-angles to a coupling conductor 2a. Magnetically polarized YIG spheres 3 are inserted in the spacing. In addition to the magnetic coupling, conductors 2 are also electromagnetically coupled through a gap of dimensions a, b. It can be shown that the signals transmitted by the two types of coupling are in antiphase at frequencies on either side of the pass band, whereby poles of attenuation are created at these points.. The same effect arises in a filter having more than two sections if the electromagnetic coupling is arranged between sections separated by an even number of intermediate sections. The filter is enclosed in a magnetic yoke 10, 11 which attached to the substrate of the strip line 8 by two bolts 18 (one shown). The filter may be magnetically tuned either by a movable magnetic shunt or by a winding on the yoke (Fig. 8, not shown). In the case of coupled adjacent sections, the coupling gap may be adjusted by a movable shutter (Fig. 7, not shown).
GB3923072A 1971-08-26 1972-08-23 Bandpass filter Expired GB1389126A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712142748 DE2142748C3 (en) 1971-08-26 Miniaturized YIG bandpass filter with attenuation poles

Publications (1)

Publication Number Publication Date
GB1389126A true GB1389126A (en) 1975-04-03

Family

ID=5817838

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3923072A Expired GB1389126A (en) 1971-08-26 1972-08-23 Bandpass filter

Country Status (4)

Country Link
US (1) US3801936A (en)
JP (1) JPS5340062B2 (en)
FR (1) FR2150454B1 (en)
GB (1) GB1389126A (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7608560A (en) * 1976-08-02 1978-02-06 Philips Nv PROCESS FOR THE MANUFACTURE OF A MICROWAVE FILTER, WHICH INCLUDES A BODY OF GYROMAGNETIC MATERIAL AND A SOURCE OF A PRE-POLARIZED MAGNETIC FIELD, THE RESONANCE FREQUENCY OF WHICH IS A PRE-DETERMINED FUNCTION OF THE TEMPERATURE.
US4334201A (en) * 1978-09-21 1982-06-08 Tektronix, Inc. YIG Bandpass filter interconnected by means of longitudinally split coaxial transmission lines
US4465974A (en) * 1980-03-03 1984-08-14 Raytheon Company Apparatus for measuring magnetic field characteristics of magnetic materials
JPS6158301A (en) * 1984-08-30 1986-03-25 Sony Corp Magnetic device
US5086506A (en) * 1987-08-14 1992-02-04 General Electric Company Radio trunking fault detection system with power output monitoring and on-air monitoring
US4988959A (en) * 1989-10-31 1991-01-29 Avantek, Inc. YIG tuned oscillator using composite feedback
CN114938211B (en) * 2022-07-25 2022-12-02 西南应用磁学研究所(中国电子科技集团公司第九研究所) Drive circuit and miniaturized gyromagnetic filter assembly composed of same
CN116073098B (en) * 2023-03-03 2023-08-08 成都威频科技有限公司 Ultra-wideband adjustable band-pass filter
CN115939708B (en) * 2023-03-10 2023-06-02 成都威频科技有限公司 Up-down coupling wide-bandwidth adjustable band-pass filter

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3368169A (en) * 1964-05-08 1968-02-06 Stanford Research Inst Tunable bandpass filter
US3400343A (en) * 1965-02-23 1968-09-03 Physical Electronics Lab Tunable bandpass filter
US3435385A (en) * 1966-03-04 1969-03-25 Loral Corp Electronically tunable yig filter having an electronically variable bandwidth

Also Published As

Publication number Publication date
JPS5340062B2 (en) 1978-10-25
FR2150454A1 (en) 1973-04-06
US3801936A (en) 1974-04-02
DE2142748B2 (en) 1976-02-05
JPS4831037A (en) 1973-04-24
DE2142748A1 (en) 1973-03-08
FR2150454B1 (en) 1978-10-27

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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