GB867496A - Waveguide mode-suppressing filter - Google Patents

Waveguide mode-suppressing filter

Info

Publication number
GB867496A
GB867496A GB7317/59A GB731759A GB867496A GB 867496 A GB867496 A GB 867496A GB 7317/59 A GB7317/59 A GB 7317/59A GB 731759 A GB731759 A GB 731759A GB 867496 A GB867496 A GB 867496A
Authority
GB
United Kingdom
Prior art keywords
mode
waveguide
order
region
cylinder
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
GB7317/59A
Inventor
Leonard Lewin
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB7317/59A priority Critical patent/GB867496A/en
Priority to US10318A priority patent/US3132314A/en
Priority to CH211160A priority patent/CH382873A/en
Priority to BE588218A priority patent/BE588218A/en
Priority to FR820298A priority patent/FR1249783A/en
Publication of GB867496A publication Critical patent/GB867496A/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
    • H01P1/16—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion
    • H01P1/163—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion specifically adapted for selection or promotion of the TE01 circular-electric mode

Landscapes

  • Control Of Motors That Do Not Use Commutators (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

867,496. Waveguide mode suppressors. STANDARD TELEPHONES & CABLES Ltd. Feb. 26, 1960 [March 3, 1959], No. 7317/59. Class 40(8) A waveguide mode-filter for suppressing undesired high-order modes comprises a thin layer of magnetically lossy material supported in a region of the waveguide where the magnetic field component of a desired low-order mode is negligible and that of an undesired higher-order mode is close to its maximum intensity. As shown, a lossy magnetic cylinder 2 of radius 0À628R is supported by foamed polystyrene members 3, 4 within a circular waveguide 1 of radius R intended for propagation of the H 01 mode. The longitudinal field of the H 02 mode approaches its maximum intensity in the region of the magnetic cylinder and fields due to the H 03 and other modes of higher order have non- zero intensities in the same region. The cylinder 2 may be a solid piece of nickel-zinc ferrite or may be formed by winding magnetic recording tape around the inner support 4. Alternatively, it may be formed by painting the surface of either of the supports 3. 4 with a slurry containing powdered ferrite. The layer may be permanently magnetized or biased by an external field.
GB7317/59A 1959-03-03 1959-03-03 Waveguide mode-suppressing filter Expired GB867496A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB7317/59A GB867496A (en) 1959-03-03 1959-03-03 Waveguide mode-suppressing filter
US10318A US3132314A (en) 1959-03-03 1960-02-23 Waveguide mode-suppressing filter
CH211160A CH382873A (en) 1959-03-03 1960-02-25 Filter for mode suppression in waveguides
BE588218A BE588218A (en) 1959-03-03 1960-03-03 Mode suppressor filter for a waveguide
FR820298A FR1249783A (en) 1959-03-03 1960-03-03 Waveguide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7317/59A GB867496A (en) 1959-03-03 1959-03-03 Waveguide mode-suppressing filter

Publications (1)

Publication Number Publication Date
GB867496A true GB867496A (en) 1961-05-10

Family

ID=9830831

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7317/59A Expired GB867496A (en) 1959-03-03 1959-03-03 Waveguide mode-suppressing filter

Country Status (4)

Country Link
US (1) US3132314A (en)
BE (1) BE588218A (en)
CH (1) CH382873A (en)
GB (1) GB867496A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3779805A (en) * 1971-05-19 1973-12-18 Bell Telephone Labor Inc Method of making waveguide mode filter

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2270949A (en) * 1939-08-07 1942-01-27 Telefunken Gmbh Conductor arrangement for use with radio frequency apparatus
GB603119A (en) * 1944-04-28 1948-06-09 Philco Radio & Television Corp Improvements in or relating to electrically resonant cavities
US2764743A (en) * 1949-12-30 1956-09-25 Bell Telephone Labor Inc Microwave frequency-selective mode absorber
US2760171A (en) * 1951-04-20 1956-08-21 Bell Telephone Labor Inc Wave-guide mode filter
US2762981A (en) * 1951-11-10 1956-09-11 Bell Telephone Labor Inc Mode conversion in wave guides
US2951220A (en) * 1953-06-17 1960-08-30 Bell Telephone Labor Inc Wave guide with polarized ferrite element
US2948870A (en) * 1956-03-13 1960-08-09 Bell Telephone Labor Inc Microwave mode suppressors
US3041559A (en) * 1959-04-27 1962-06-26 Bell Telephone Labor Inc Microwave filter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3779805A (en) * 1971-05-19 1973-12-18 Bell Telephone Labor Inc Method of making waveguide mode filter

Also Published As

Publication number Publication date
US3132314A (en) 1964-05-05
BE588218A (en) 1960-09-05
CH382873A (en) 1964-10-15

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