GB1448254A – Gyromagnetic filter and diode mixer circuit
– Google Patents
GB1448254A – Gyromagnetic filter and diode mixer circuit
– Google Patents
Gyromagnetic filter and diode mixer circuit
Info
Publication number
GB1448254A
GB1448254A
GB5077673A
GB5077673A
GB1448254A
GB 1448254 A
GB1448254 A
GB 1448254A
GB 5077673 A
GB5077673 A
GB 5077673A
GB 5077673 A
GB5077673 A
GB 5077673A
GB 1448254 A
GB1448254 A
GB 1448254A
Authority
GB
United Kingdom
Prior art keywords
conductors
mhz
crystal
odd
circuit
Prior art date
1972-11-04
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
GB5077673A
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.)
1972-11-04
Filing date
1973-11-01
Publication date
1976-09-02
1973-11-01
Application filed by Philips Electronic and Associated Industries Ltd
filed
Critical
Philips Electronic and Associated Industries Ltd
1976-09-02
Publication of GB1448254A
publication
Critical
patent/GB1448254A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
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
H01P1/201—Filters for transverse electromagnetic waves
H01P1/203—Strip line filters
Abstract
1448254 Radio receivers PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 1 Nov 1973 [4 Nov 1972] 50776/73 Heading H3Q [Also in Division H1] An electromagnetic filter, which may be incorporated in a diode mixer circuit, comprises first and second transmission lines coupled by a gyromagnetic body at a desired frequency, the first transmission line comprising two live conductors and a ground conductor arranged so that even-mode and odd-mode waves at that frequency can exist on the line in the vicinity of the gyromagnetic body, the filter further comprising means for terminating the first line in the vicinity of the gyromagnetic body whereby at the termination the even-mode waves are substantially short-circuited but a high impedance is presented between the live conductors for the odd-mode waves. As shown in Fig. 1, a signal which may represent a television signal in the frequency range 50 to 900 MHz is applied through conductors L 1 , L 2 to a diode bridge R 1 , the output of which is fed via conductors L 3 , L 4 forming with a ground plate (A) (Figs. 2, 3, not shown) a transmission line to a yttrium-iron garnet (YIG) crystal Y 1 , which is polarized by a magnetic field perpendicular to the plane of the conductors, and has a magnetic resonance at 2000 MHz. At points 1, 2 just beyond the crystal Y 1 , the conductors L 1 , L 2 are connected to a line R 5 , having an electric length of half a wavelength at 2000 MHz. Points 1, 2 are also connected by conductors L 6 , L 7 to a local oscillator of which the frequency may be varied from 2050 to 2900 MHz. The oscillator output consists of «odd» waves, i.e. the currents flowing in conductors L 6 , L 3 , and L 7 , L 4 are in phase-opposition and balanced with respect to the ground plate (A), and is applied to the diode bridge R 1 . The mixing of signal and oscillator frequencies gives the usual mixture of frequencies, including an i.f. signal at 2000 MHz which appears as an «even» wave, i.e. the currents in conductors L 3 , L 4 are in the same phase with respect to the ground plate (A). The conductors are formed as flat strips on a dielectric sheet, with the ground plate (A) on the other side of the sheet, and the crystal Y 1 embedded in the dielectric. It is shown that the «even» i.f. signal is much more strongly coupled to the crystal Y 1 than the «odd» oscillator output. The line R 5 acts like a short-circuit at the i.f. of 2000 MHz, so that a current anti-mode occurs at points 1, 2, giving maximum coupling. The crystal Y 1 gives an output to another circuit through an aperture (K) in the ground plate (A). The second circuit may be similar to that described, mounted on the other side of plate (A), and rotated 90 degrees with respect to the first. It has a crystal Y 2 , similar to and situated opposite Y 1 ; an oscillator G2 operating at a fixed frequency 1965 MHz as odd waves travelling along conductors L 11 , L 8 and L 12 , L 9 and mix in diode bridge R 2 with the 2000 MHz i.f. from the first circuit. A second i.f. of 35 MHz appears at the output terminals U 1 , U 2 . The two crystals give a band-pass filter; otherwise a single crystal may be used. The filter may be used in the diode mixer circuit of Specification 1,287,535.
GB5077673A
1972-11-04
1973-11-01
Gyromagnetic filter and diode mixer circuit
Expired
GB1448254A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
NL7214941A
NL7214941A
(en)
1972-11-04
1972-11-04
Publications (1)
Publication Number
Publication Date
GB1448254A
true
GB1448254A
(en)
1976-09-02
Family
ID=19817302
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB5077673A
Expired
GB1448254A
(en)
1972-11-04
1973-11-01
Gyromagnetic filter and diode mixer circuit
Country Status (7)
Country
Link
US
(1)
US3838367A
(en)
JP
(1)
JPS5244694B2
(en)
CA
(1)
CA1002129A
(en)
FR
(1)
FR2205753B1
(en)
GB
(1)
GB1448254A
(en)
IT
(1)
IT1001616B
(en)
NL
(1)
NL7214941A
(en)
Cited By (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2131627A
(en)
*
1982-12-03
1984-06-20
Raytheon Co
A magnetically tuned resonant circuit
GB2131628A
(en)
*
1982-12-03
1984-06-20
Raytheon Co
Magnetically tuned resonant circuit
Families Citing this family (8)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
DE2334570B1
(en)
*
1973-07-07
1975-03-06
Philips Patentverwaltung
Tunable radio frequency input circuitry for a television receiver
US3973204A
(en)
*
1975-02-25
1976-08-03
Hewlett-Packard Company
YIG tuned mixer
US4169253A
(en)
*
1978-05-08
1979-09-25
Loral Corporation
Frequency offset technique for YIG devices
US4292357A
(en)
*
1979-07-25
1981-09-29
Eagle-Picher Industries, Inc.
Zinc/zinc oxide laminated anode assembly
US4600906A
(en)
*
1982-12-03
1986-07-15
Raytheon Company
Magnetically tuned resonant circuit wherein magnetic field is provided by a biased conductor on the circuit support structure
US4521753A
(en)
*
1982-12-03
1985-06-04
Raytheon Company
Tuned resonant circuit utilizing a ferromagnetically coupled interstage line
US4609892A
(en)
*
1985-09-30
1986-09-02
Motorola, Inc.
Stripline filter apparatus and method of making the same
JPH02134154A
(en)
*
1988-11-15
1990-05-23
Yuzo Sugiura
Molding device for moxa of moxibustion
Family Cites Families (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3560884A
(en)
*
1969-04-16
1971-02-02
Westinghouse Electric Corp
Multiplexing device having tunable ferromagnetic resonators interposed between two out-of-phase transmission lines
1972
1972-11-04
NL
NL7214941A
patent/NL7214941A/xx
not_active
Application Discontinuation
1973
1973-10-23
US
US00408512A
patent/US3838367A/en
not_active
Expired – Lifetime
1973-11-01
CA
CA184,820A
patent/CA1002129A/en
not_active
Expired
1973-11-01
GB
GB5077673A
patent/GB1448254A/en
not_active
Expired
1973-11-02
IT
IT30852/73A
patent/IT1001616B/en
active
1973-11-02
FR
FR7339047A
patent/FR2205753B1/fr
not_active
Expired
1973-11-02
JP
JP48122942A
patent/JPS5244694B2/ja
not_active
Expired
Cited By (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2131627A
(en)
*
1982-12-03
1984-06-20
Raytheon Co
A magnetically tuned resonant circuit
GB2131628A
(en)
*
1982-12-03
1984-06-20
Raytheon Co
Magnetically tuned resonant circuit
Also Published As
Publication number
Publication date
NL7214941A
(en)
1974-05-07
JPS5244694B2
(en)
1977-11-10
FR2205753B1
(en)
1978-11-17
IT1001616B
(en)
1976-04-30
US3838367A
(en)
1974-09-24
DE2353750B2
(en)
1977-03-10
JPS4979441A
(en)
1974-07-31
DE2353750A1
(en)
1974-05-09
CA1002129A
(en)
1976-12-21
FR2205753A1
(en)
1974-05-31
AU6211773A
(en)
1975-05-08
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(en)
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Legal Events
Date
Code
Title
Description
1977-01-13
PS
Patent sealed [section 19, patents act 1949]
1988-06-22
PCNP
Patent ceased through non-payment of renewal fee
