GB818665A - Improvements in or relating to ultra-high frequency directional coupler filters - Google Patents
Improvements in or relating to ultra-high frequency directional coupler filtersInfo
- Publication number
- GB818665A GB818665A GB36037/57A GB3603757A GB818665A GB 818665 A GB818665 A GB 818665A GB 36037/57 A GB36037/57 A GB 36037/57A GB 3603757 A GB3603757 A GB 3603757A GB 818665 A GB818665 A GB 818665A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cavity
- mode
- filters
- guides
- resonant frequency
- 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
Links
- 230000008878 coupling Effects 0.000 abstract 2
- 238000010168 coupling process Methods 0.000 abstract 2
- 238000005859 coupling reaction Methods 0.000 abstract 2
- IHQKEDIOMGYHEB-UHFFFAOYSA-M sodium dimethylarsinate Chemical class [Na+].C[As](C)([O-])=O IHQKEDIOMGYHEB-UHFFFAOYSA-M 0.000 abstract 2
- 229910000859 α-Fe Inorganic materials 0.000 abstract 2
- 230000005684 electric field Effects 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 230000000644 propagated effect Effects 0.000 abstract 1
- 230000001902 propagating effect Effects 0.000 abstract 1
- 230000007704 transition Effects 0.000 abstract 1
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
- H01P1/215—Frequency-selective devices, e.g. filters using ferromagnetic material
-
- 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
- H01P1/2138—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies using hollow waveguide filters
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
818,665. Filters;directional couplers and non-reciprocal waveguide devices. MARIE, G. R. P. Nov. 19, 1957 [Nov. 19, 1956], No. 36037/57. Class 40 (8). A directional-coupler filter comprises two rectangular waveguides coupled by one or more cavities resonating at the same frequency in two modes TE oPq and TE opq , where p and q are respectively even and odd. As shown in Figs. 2 and 3, rectangular guides 10 and 11 are coupled by a square-section cavity 12, the guides and the cavity having a common median plane extending parallel to the broad sides of the guides. The narrow dimension of the cavity is equal to or less than the narrow dimension of the guides. A TE 01 wave propagated in the guides 10, 11 at the resonant frequency of the cavity is coupled to the cavity by apertures 5, 6, 7, 8 symmetrically arranged about a median plane of the cavity normal to the waveguide axes. The electric field pattern of the TE 023 and TE 032 modes excited in the cavity is shown in Figs. 2 and 3 where the dotted lines represent planes of zero electric intensity. The resonant frequency of the cavity for each mode may be varied independently by movable pairs of dielectric rods 13, 14 and 15, 16, each pair being disposed to lie in a plane of zero electric intensity for the mode it is desired not to affect. It is necessary that the loaded Q's of the cavity for each mode should be equal and these may be adjusted by adjusting the sizes of the coupling apertures. If the pairs of apertures 7, 8 are spaced apart a distance equal to one third of the side of the cavity, they do not affect the loaded Q of the cavity for the symmetrical mode of Fig. 2. The central apertures 5, 6 do not affect the asymmetrical mode. It may be shown that energy at the resonant frequency of the cavity is completely transferred between outputs 1 and 3 or 2 and 4 whilst energy at other frequencies propagates directly between outputs 1 and 2 or 3 and 4. If the cavity is loaded along its axis of symmetry by a ferrite rod biased by an axial magnetic field of sufficient intensity to cause gyromagnetic resonance near the resonance frequency of the cavity, the filter will have non-reciprocal properties, i.e. the cavity will have one resonant frequency for energy transferred from 1 to 3 or 4 to 2 and a different resonant frequency for energy transferred from 3 to 1 or 2 to 4. Broad-band operation may be obtained by a coupling using a number of cavities in parallel spaced apart in the axial direction of the waveguides by an odd number of quarter-wavelengths at the central frequency of the pass-band and tuned to different frequencies within the pass-band. In the modification of Fig. 6, the waveguides 31, 32 are designed to transmit a TE o2 wave and the cavity 30 (in all respects similar to the cavity 12, Figs. 2, 3) is coupled to the broad sides of the waveguides along their centre lines. In the band-separating system of Fig. 7 a TE o1 wave in circular waveguide 40 is transformed to a TE o2 in rectangular waveguide 58. Connected to the rectangular guide are three filters 48, 49, 50 each comprising two parallel-connected cavities and associated respectively with a receiver 53, a second receiver 54 and a transmitter 55. Transition sections 45, 46, 47 interposed between the filters and the devices 53, 54, 55 transform between the TE 02 mode and the TE 01 mode utilized in the devices. If the filters 48, 49 are made non-reciprocal, it is possible to use for the transmitter 55 a frequency lying within the bandwidths of the receivers 53, 54 since the filters will offer a high impedance to waves propagating towards the circular guide 40. The biasing magnets for the ferrite rods are shown at 51, 52. The mode-transforming sections 41, 45, 46, 47 are described in Specification 805,510. Specification 810,057 also is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1213073X | 1956-11-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB818665A true GB818665A (en) | 1959-08-19 |
Family
ID=9676399
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB36037/57A Expired GB818665A (en) | 1956-11-19 | 1957-11-19 | Improvements in or relating to ultra-high frequency directional coupler filters |
Country Status (6)
Country | Link |
---|---|
US (1) | US2934720A (en) |
BE (1) | BE561886A (en) |
CH (1) | CH354867A (en) |
DE (1) | DE1213073B (en) |
FR (1) | FR1160863A (en) |
GB (1) | GB818665A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3108742C2 (en) * | 1981-03-07 | 1985-11-14 | ANT Nachrichtentechnik GmbH, 7150 Backnang | Selective directional coupler |
US9385406B2 (en) | 2012-12-14 | 2016-07-05 | Apollo Microwaves, Ltd. | Non-reciprocal gyromagnetic phase shift devices using multiple ferrite-containing slabs |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2626990A (en) * | 1948-05-04 | 1953-01-27 | Bell Telephone Labor Inc | Guided wave frequency range transducer |
US2748350A (en) * | 1951-09-05 | 1956-05-29 | Bell Telephone Labor Inc | Ultra-high frequency selective mode directional coupler |
US2823356A (en) * | 1952-12-11 | 1958-02-11 | Bell Telephone Labor Inc | Frequency selective high frequency power dividing networks |
FR1079880A (en) * | 1953-03-23 | 1954-12-03 | Resonant directional couplers |
-
0
- BE BE561886D patent/BE561886A/xx unknown
-
1956
- 1956-11-19 FR FR1160863D patent/FR1160863A/en not_active Expired
-
1957
- 1957-10-11 CH CH354867D patent/CH354867A/en unknown
- 1957-10-16 US US690514A patent/US2934720A/en not_active Expired - Lifetime
- 1957-11-19 DE DEM35951A patent/DE1213073B/en active Pending
- 1957-11-19 GB GB36037/57A patent/GB818665A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR1160863A (en) | 1958-08-12 |
DE1213073B (en) | 1966-03-24 |
CH354867A (en) | 1961-06-15 |
BE561886A (en) | |
US2934720A (en) | 1960-04-26 |
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