GB625980A - Improvements relating to filters for guided electromagnetic waves - Google Patents

Improvements relating to filters for guided electromagnetic waves

Info

Publication number
GB625980A
GB625980A GB22865/46A GB2286546A GB625980A GB 625980 A GB625980 A GB 625980A GB 22865/46 A GB22865/46 A GB 22865/46A GB 2286546 A GB2286546 A GB 2286546A GB 625980 A GB625980 A GB 625980A
Authority
GB
United Kingdom
Prior art keywords
guide
partition
filters
wave
partitions
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
GB22865/46A
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.)
Thales SA
Original Assignee
CSF Compagnie Generale de Telegraphie sans Fil SA
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 CSF Compagnie Generale de Telegraphie sans Fil SA filed Critical CSF Compagnie Generale de Telegraphie sans Fil SA
Publication of GB625980A publication Critical patent/GB625980A/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
    • H01P1/207—Hollow waveguide filters

Landscapes

  • Control Of Motors That Do Not Use Commutators (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

625,980. High-frequency electric filters. COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. July 31, 1946, No. 22865. Convention date, June 16, 1943. [Class 40 (viii)] A high-frequency filter in a wave-guide is formed by introducing into the guide a transverse apertured partition, measuring its reflection coefficient and dephasing angle #1, and then introducing a second transverse partition with an aperture adjusted to produce a reflection coefficient equal to that of the first partition, measuring the dephasing angle #2 of this second partition, and separating the two partitions by a distance " d " determined from the expression 2#d/#1 = #1+#2/2, #1 being the wavelength it is desired that the filter shall pass. In the arrangement shown, the partitions 2 and 6 are provided with slot apertures and their distance apart is adjusted by means passing through a slit 5 in the wave-guide. By placing two such filters in succession in a wave-guide, and tuning them to slightly different wavelengths a bandpass filter is produced.
GB22865/46A 1943-06-16 1946-07-31 Improvements relating to filters for guided electromagnetic waves Expired GB625980A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR876873X 1943-06-16

Publications (1)

Publication Number Publication Date
GB625980A true GB625980A (en) 1949-07-07

Family

ID=9360766

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22865/46A Expired GB625980A (en) 1943-06-16 1946-07-31 Improvements relating to filters for guided electromagnetic waves

Country Status (5)

Country Link
BE (1) BE456300A (en)
DE (1) DE876873C (en)
FR (1) FR982405A (en)
GB (1) GB625980A (en)
NL (1) NL61973C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2819452A (en) * 1952-05-08 1958-01-07 Itt Microwave filters
US3697898A (en) * 1970-05-08 1972-10-10 Communications Satellite Corp Plural cavity bandpass waveguide filter

Also Published As

Publication number Publication date
FR982405A (en) 1951-06-11
BE456300A (en)
NL61973C (en)
DE876873C (en) 1953-05-18

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