GB820632A - Improvements in or relating to ultra-high frequency band separating filters - Google Patents

Improvements in or relating to ultra-high frequency band separating filters

Info

Publication number
GB820632A
GB820632A GB12807/57A GB1280757A GB820632A GB 820632 A GB820632 A GB 820632A GB 12807/57 A GB12807/57 A GB 12807/57A GB 1280757 A GB1280757 A GB 1280757A GB 820632 A GB820632 A GB 820632A
Authority
GB
United Kingdom
Prior art keywords
guides
frequency
coupling
band
waveguide
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
GB12807/57A
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.)
Marie G R P
Original Assignee
Marie G R P
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 Marie G R P filed Critical Marie G R P
Publication of GB820632A publication Critical patent/GB820632A/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
    • H01P1/213—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies

Landscapes

  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

820,632. Waveguide directional couplers. MARIE, G. R. P. April 18, 1957 [April 28, 1956], No. 12807/57. Class 40 (8). A filter for separating two frequency bands comprises a waveguide directional coupler having a number of coupling waveguides whose cut-off frequency lies between the inner limits of the two bands to be separated. As shown in Fig. 4, a square-section waveguide 10 along which energy of both bands propagates is coupled by means of two series 17, 18 of waveguide sections to a pair of secondary waveguides 11, 12 of rectangular section. Only the energy in the upper frequency band is transferred to the secondary guides 11, 12 since the coupling guides are beyond cut-off for the lower band of frequencies. The secondary guides are coupled by an E-plane T-junction to a common output 14. By providing two pairs of secondary guides coupled to all four sides of the main guide 10 by four series of coupling guides, band separation can be achieved independently for two systems of waves polarized at rightangles in the main guide (Fig. 5, not shown). A simplification may be obtained by using one of the electrically identical halves of the construction of Fig. 4 obtained by bisection in the plane 20, 21, 22. In such a modification, the main guide 1, Figs. 1, 2, is of rectangular section and of the same dimensions as the single secondary guide 2. The coupling guides 4, 5 all have the same cut-off frequency, those near the centre of the coupling being dimensioned for a higher characteristic impedance than those near the extremities. The guides are spaced at intervals of one quarter wavelength at the upper mid-band frequency and are an odd number of quarter wavelengths long at this frequency. Concentration of the energy in the upper band near the ends of the coupling guides may be obtained by means of dielectric slabs 6, 7 having the profile and cross-section shown. This construction of coupler is applicable to all the modifications.
GB12807/57A 1956-04-28 1957-04-18 Improvements in or relating to ultra-high frequency band separating filters Expired GB820632A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1110775X 1956-04-28

Publications (1)

Publication Number Publication Date
GB820632A true GB820632A (en) 1959-09-23

Family

ID=9626389

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12807/57A Expired GB820632A (en) 1956-04-28 1957-04-18 Improvements in or relating to ultra-high frequency band separating filters

Country Status (6)

Country Link
US (1) US2866595A (en)
BE (1) BE554200A (en)
CH (1) CH335544A (en)
DE (1) DE1110775B (en)
FR (1) FR1150118A (en)
GB (1) GB820632A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2233831A (en) * 1989-07-15 1991-01-16 British Aerospace Waveguide coupling networks
GB2237692A (en) * 1989-11-02 1991-05-08 British Aerospace Waveguide networks
US5105170A (en) * 1989-07-15 1992-04-14 British Aerospace Public Limited Company Waveguide coupling networks

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2961619A (en) * 1957-06-21 1960-11-22 Sperry Rand Corp Microwave filter
GB918419A (en) * 1958-05-28 1963-02-13 Gen Electric Co Ltd Improvements in or relating to transmission line coupling arrangements
US3237134A (en) * 1963-03-26 1966-02-22 Gen Electric Microwave filter
US3451014A (en) * 1964-12-23 1969-06-17 Microwave Dev Lab Inc Waveguide filter having branch means to absorb or attenuate frequencies above pass-band
US3353123A (en) * 1965-09-01 1967-11-14 Gen Electric Microwave filter comprising absorbing structures for removing suprious wave energy
US3464035A (en) * 1966-07-25 1969-08-26 Gerald W Van Kol Filter coupled to microwave guide
US3518576A (en) * 1967-06-27 1970-06-30 North American Rockwell Crossed guide directional coupler
US3634788A (en) * 1967-09-27 1972-01-11 Int Standard Electric Corp Waveguide filter
IT1149770B (en) * 1982-02-25 1986-12-10 Italtel Spa CIRCUIT TO SEPARATE TWO BANDS OF FREQUENCIES FOR HIGH-FREQUENCY DOUBLE POLARIZATION SIGNALS
BR8305993A (en) * 1983-10-25 1985-06-04 Brasilia Telecom DIRECTIONAL ACIPLATOR USING CORRUGATED GUIDE TO SEPARATE TWO FREQUENCY BANDS MAINTAINING POLARIZATION CHARACTERISTICS
BR8307286A (en) * 1983-12-27 1985-08-06 Brasilia Telecom TRANSITION BETWEEN FLAT AND CORRUGATED GUIDE FOR OPERATION IN TWO DIFFERENT FREQUENCY BANDS
US4704589A (en) * 1986-05-27 1987-11-03 The United States Of America As Represented By The United States Department Of Energy Compact waveguide power divider with multiple isolated outputs
US7009469B2 (en) * 2002-06-28 2006-03-07 Harris Corporation Compact waveguide filter and method
FR2929796B1 (en) * 2008-04-02 2014-09-26 Centre Nat Etd Spatiales COUPLER FOR RADIO FREQUENCY MULTIBAND SYSTEM.

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2129712A (en) * 1933-12-09 1938-09-13 American Telephone & Telegraph Transmission of energy effects by guided electric waves in a dielectric medium
US2562281A (en) * 1944-06-14 1951-07-31 Bell Telephone Labor Inc Directive pickup for transmission lines
US2558385A (en) * 1946-01-07 1951-06-26 Edward M Purcell Branch guide coupler
GB635760A (en) * 1946-08-02 1950-04-19 Gen Electric Co Ltd Improvements in electric signalling systems incorporating wave-guide connections
US2626990A (en) * 1948-05-04 1953-01-27 Bell Telephone Labor Inc Guided wave frequency range transducer
US2585173A (en) * 1948-07-01 1952-02-12 Raytheon Mfg Co Radio-frequency transmission line circuit
US2748350A (en) * 1951-09-05 1956-05-29 Bell Telephone Labor Inc Ultra-high frequency selective mode directional coupler
US2783439A (en) * 1952-01-03 1957-02-26 Bendix Aviat Corp Continuously rotatable microwave phase shifter
US2730677A (en) * 1952-08-26 1956-01-10 Csf Ultra-high frequency wave-mode transformers

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2233831A (en) * 1989-07-15 1991-01-16 British Aerospace Waveguide coupling networks
US5105170A (en) * 1989-07-15 1992-04-14 British Aerospace Public Limited Company Waveguide coupling networks
GB2233831B (en) * 1989-07-15 1994-03-23 British Aerospace Shared power amplifiers
GB2237692A (en) * 1989-11-02 1991-05-08 British Aerospace Waveguide networks
GB2237692B (en) * 1989-11-02 1994-02-09 British Aerospace Waveguide networks

Also Published As

Publication number Publication date
FR1150118A (en) 1958-01-08
DE1110775B (en) 1961-07-13
BE554200A (en)
CH335544A (en) 1959-01-15
US2866595A (en) 1958-12-30

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