GB642418A - Improvements relating to variable attenuators for high frequency currents - Google Patents

Improvements relating to variable attenuators for high frequency currents

Info

Publication number
GB642418A
GB642418A GB21848/47A GB2184847A GB642418A GB 642418 A GB642418 A GB 642418A GB 21848/47 A GB21848/47 A GB 21848/47A GB 2184847 A GB2184847 A GB 2184847A GB 642418 A GB642418 A GB 642418A
Authority
GB
United Kingdom
Prior art keywords
section
attenuator
sleeve
film
line
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
GB21848/47A
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.)
Polytechnic Institute of NYU
Original Assignee
Polytechnic Institute of NYU
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 Polytechnic Institute of NYU filed Critical Polytechnic Institute of NYU
Publication of GB642418A publication Critical patent/GB642418A/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
    • H01P1/22—Attenuating devices
    • H01P1/225—Coaxial attenuators

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)
  • Adjustable Resistors (AREA)

Abstract

642,418. High-frequency attenuators. POLYTECHNIC INSTITUTE OF BROOKLYN. Aug. 8, 1947, No. 21848. Convention date, June 21, 1945. [Class 40 (viii)] A variable attenuator comprises a transmission conductor 2 having an attenuator section of relatively high resistance and a conductive sleeve surrounding the conductor and slidable thereon to shunt a variable portion of the attenuator section. In the arrangement shown, the attenuator section consists of an insulating support on which a metallic film is deposited. This film may be divided into sections. Section d-e is thin and comprises the attenuating portion. Section b-c is thicker and forms an impedance transformer section to match the attenuator to the line. Sections a-b and c-d are much thicker and act merely as conductors on which the sleeve may slide. The latter consists of a metal section 4 and an insulating section 5 which carries a film to form a matching section equivalent to b-c. The sleeve is broad enough to span the attenuator section and shunt it completely. It is moved by an arm 6 connected to a rack 7 engaging with a hand-operated gear-wheel 9. By placing the attenuator at a right-angle bend in a coaxial line the sleeve may project out of the end of its length of line and be adjusted without the necessity for arm 6 passing through the outer conductor. Specification 579,073 is referred to.
GB21848/47A 1945-06-21 1947-08-08 Improvements relating to variable attenuators for high frequency currents Expired GB642418A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US600726A US2510614A (en) 1945-06-21 1945-06-21 Variable attenuator

Publications (1)

Publication Number Publication Date
GB642418A true GB642418A (en) 1950-09-06

Family

ID=24404817

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21848/47A Expired GB642418A (en) 1945-06-21 1947-08-08 Improvements relating to variable attenuators for high frequency currents

Country Status (2)

Country Link
US (1) US2510614A (en)
GB (1) GB642418A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2796588A (en) * 1946-02-01 1957-06-18 Richard M Walker Compact waveguide attenuator
US2701863A (en) * 1950-12-27 1955-02-08 Roger J Pierce Piston-type variable attenuator
GB827612A (en) * 1956-06-30 1960-02-10 Egen Electric Ltd Improvements in or relating to attenuators for co-axial lines
US2951999A (en) * 1958-04-21 1960-09-06 Itt Constant impedance attenuator
US3237133A (en) * 1964-02-27 1966-02-22 Weinschel Engineering Co Linear variable lossy line attenuator
DE102010045780A1 (en) * 2010-09-17 2012-03-22 Rohde & Schwarz Gmbh & Co. Kg Calibration unit for a measuring device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2151157A (en) * 1936-10-31 1939-03-21 Bell Telephone Labor Inc Guided electromagnetic wave transmission
US2197123A (en) * 1937-06-18 1940-04-16 Bell Telephone Labor Inc Guided wave transmission
US2197122A (en) * 1937-06-18 1940-04-16 Bell Telephone Labor Inc Guided wave transmission
GB579073A (en) * 1942-11-21 1946-07-23 John Collard Improvements in or relating to attenuators for electric waves of very short length
US2423461A (en) * 1945-05-18 1947-07-08 Gen Electric Attenuator for ultra high frequencies

Also Published As

Publication number Publication date
US2510614A (en) 1950-06-06

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