GB576145A - An improved attenuator for guided electro-magnetic waves - Google Patents

An improved attenuator for guided electro-magnetic waves

Info

Publication number
GB576145A
GB576145A GB8053/44A GB805344A GB576145A GB 576145 A GB576145 A GB 576145A GB 8053/44 A GB8053/44 A GB 8053/44A GB 805344 A GB805344 A GB 805344A GB 576145 A GB576145 A GB 576145A
Authority
GB
United Kingdom
Prior art keywords
plate
guide
attenuator
attenuation
section
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
GB8053/44A
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.)
AT&T Corp
Original Assignee
Western Electric Co 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 Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of GB576145A publication Critical patent/GB576145A/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

Abstract

576,145. Wave guides. WESTERN ELECTRIC CO., Inc. April 28, 1944, No. 8053. Convention date, May 7, 1943. [Class 40 (v)] An attenuator for electromagnetic waves comprises a metallic wave guide section 1 and a resistive septum or plate 2 longitudinally positioned therein and spaced therefrom a distance such as to afford the desired attenuation to waves flowing in the section. The plate 2, of phenol fibre coated on the face next to the guide with a resistive material such as finely divided graphite, is fixed by an insulating screw 8 to an insulating rod 7 which passes through the guide and is axially movable by means of rack 12 and pinion 13 rotated by a knob 19 having a calibration scale 18 and fixed index 21. The ends of plate 2 are notched at 24, 25, Fig. 3, to reduce end reflection, and a shaped central aperture 26 is provided to reduce the variation of attenuation with frequency.
GB8053/44A 1943-05-07 1944-04-28 An improved attenuator for guided electro-magnetic waves Expired GB576145A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US576145XA 1943-05-07 1943-05-07

Publications (1)

Publication Number Publication Date
GB576145A true GB576145A (en) 1946-03-20

Family

ID=22011689

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8053/44A Expired GB576145A (en) 1943-05-07 1944-04-28 An improved attenuator for guided electro-magnetic waves

Country Status (2)

Country Link
FR (1) FR927268A (en)
GB (1) GB576145A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2578249A (en) * 1946-12-04 1951-12-11 Polytechnic Inst Brooklyn Variable attenuator with linear drive
US2683255A (en) * 1950-05-16 1954-07-06 Bell Telephone Labor Inc Switch attenuator for wave guides

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2578249A (en) * 1946-12-04 1951-12-11 Polytechnic Inst Brooklyn Variable attenuator with linear drive
US2683255A (en) * 1950-05-16 1954-07-06 Bell Telephone Labor Inc Switch attenuator for wave guides

Also Published As

Publication number Publication date
FR927268A (en) 1947-10-24

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