GB1235718A - Varactor tuned microstrip tuner - Google Patents

Varactor tuned microstrip tuner

Info

Publication number
GB1235718A
GB1235718A GB4786068A GB4786068A GB1235718A GB 1235718 A GB1235718 A GB 1235718A GB 4786068 A GB4786068 A GB 4786068A GB 4786068 A GB4786068 A GB 4786068A GB 1235718 A GB1235718 A GB 1235718A
Authority
GB
United Kingdom
Prior art keywords
conductor
ground plane
line
conductors
capacitor
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
GB4786068A
Inventor
Harry Forwood Cooke
Roger Lewis Weber
Donald Bryan Hall
Darrell Wayne Whitten
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.)
Texas Instruments Inc
Original Assignee
Texas Instruments Inc
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 Texas Instruments Inc filed Critical Texas Instruments Inc
Publication of GB1235718A publication Critical patent/GB1235718A/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
    • H01P1/201—Filters for transverse electromagnetic waves
    • H01P1/203—Strip line filters
    • H01P1/20327—Electromagnetic interstage coupling
    • H01P1/20354—Non-comb or non-interdigital filters
    • H01P1/20372—Hairpin resonators
    • 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
    • H01P1/20327—Electromagnetic interstage coupling
    • H01P1/20354—Non-comb or non-interdigital filters
    • H01P1/20381—Special shape resonators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00—Coupling devices of the waveguide type
    • H01P5/08—Coupling devices of the waveguide type for linking dissimilar lines or devices
    • H01P5/10—Coupling devices of the waveguide type for linking dissimilar lines or devices for coupling balanced with unbalanced lines or devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/02—Details
    • H03J3/16—Tuning without displacement of reactive element, e.g. by varying permeability
    • H03J3/18—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance
    • H03J3/185—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance with varactors, i.e. voltage variable reactive diodes

Abstract

1,235,718. Circuit assemblies; filters. TEXAS INSTRUMENTS Inc. 9 Oct., 1968 [30 Oct., 1967], No. 47860/68. Headings H1R and H1W. [Also in Divisions H3-H5] A converter for tuning in the U.H.F. region (see Division H1) comprises preselector strip lines 11, 24, a link coupling circuit 21, 22, 22a, 23 and oscillator line 46 all formed photographically on an insulating substrate of, e.g. alumina, barium titanate or magnesium titanium oxide, and having a metallic ground plane 3 formed on its underside. Varactor diodes 15, 29, 53 are mounted on conductors 16, 30, 52 respectively, the common control voltage being applied over leads 17, 24, 57 respectively, which are provided with chokes in the form of ferrite beads 18, 33, 56 respectively. Conductors 16, 30, 52 are connected by decoupling capacitors 19, 31, 54 respectively to conductors 20, 32, 55 respectively which are earthed to the ground plane 3, as are the earthy ends of lines 11, 24, 46 by means of stubs 10 passing through the substrate 2. Trimmer capacitors are constituted by metallic coatings 12, 27, 49 superimposed on dielectric members 13, 26, 50 respectively, each capacitor may also comprise as second electrode either the ground plane (Fig. 4b, not shown) or a metallic coating on the top surface of substrate 2, connected by an earthing stub to the ground plane 3 (Fig. 4a, not shown), adjustment being by air abrasion to remove portions of the coatings. A mixer diode 37 is mounted on conductor 38 and connected by lead 36 to conductor 25 which forms a tap on line 24; conductor 39 forms a coupling to oscillator line 46 and is connected for I.F. output to terminal 45 via chokes 40, 44, capacitor 42 providing decoupling to the earthed member 41. Oscillator transistor 58 is mounted by its collector on conductor 48 which is tapped into line 46, its emitter being connected via conductor 59 to decoupling capacitor 63 and bias resistor 60 and its base via conductor 65 to biasing resistors 67, 70. The input to the arrangement comprises a balun formed by strip lines 8, 9 surrounded by ferrite members 4, 5.
GB4786068A 1967-10-30 1968-10-09 Varactor tuned microstrip tuner Expired GB1235718A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US67906367A 1967-10-30 1967-10-30

Publications (1)

Publication Number Publication Date
GB1235718A true GB1235718A (en) 1971-06-16

Family

ID=24725431

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4786068A Expired GB1235718A (en) 1967-10-30 1968-10-09 Varactor tuned microstrip tuner

Country Status (2)

Country Link
DE (1) DE1805796B2 (en)
GB (1) GB1235718A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1057837B (en) * 1976-04-05 1982-03-30 Indesit DEVICE FOR TUNING A TELEVISION

Also Published As

Publication number Publication date
DE1805796B2 (en) 1977-07-14
DE1805796A1 (en) 1969-05-29

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