GB905689A - Improvements in or relating to waveguide transmission systems - Google Patents
Improvements in or relating to waveguide transmission systemsInfo
- Publication number
- GB905689A GB905689A GB14272/60A GB1427260A GB905689A GB 905689 A GB905689 A GB 905689A GB 14272/60 A GB14272/60 A GB 14272/60A GB 1427260 A GB1427260 A GB 1427260A GB 905689 A GB905689 A GB 905689A
- Authority
- GB
- United Kingdom
- Prior art keywords
- waveguide
- modes
- slots
- mode
- guide
- 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
- 230000005540 biological transmission Effects 0.000 title abstract 2
- 230000008878 coupling Effects 0.000 abstract 2
- 238000010168 coupling process Methods 0.000 abstract 2
- 238000005859 coupling reaction Methods 0.000 abstract 2
- 239000000956 alloy Substances 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 238000003491 array Methods 0.000 abstract 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 abstract 1
- 239000004020 conductor Substances 0.000 abstract 1
- 238000010276 construction Methods 0.000 abstract 1
- 230000005684 electric field Effects 0.000 abstract 1
- 230000001939 inductive effect Effects 0.000 abstract 1
- 229910001120 nichrome Inorganic materials 0.000 abstract 1
- 230000001902 propagating effect 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
- H01P1/16—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion
- H01P1/162—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion absorbing spurious or unwanted modes of propagation
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
905,689. Waveguides. DECCA Ltd. April 17, 1961 [April 22, 1960], No. 14272/60. Class 40 (8). A waveguide transmission system makes use of a rectangular waveguide 13 in which a plane polarized TE wave is transmitted with its electric field parallel to the longer sides. The dimensions of the longer sides are such that the guide is capable of propagating more than one mode, but mode filters are used to suppress all except TE no modes. These filters may take the form of resistive films (e.g. of NiCr alloy) or filaments 20, Fig. 4, extending across the guide parallel to the shorter sides. The short dimension of the guide may be such that modes with more than one half-period of the electric vector are evanescent. Preferably, however, this dimension is great enough to allow propagation of the TE 20 mode and this mode is suppressed by means of slots or arrays of slots or holes 21 arranged on the median lines of the shorter sides. These slots communicate with absorbing means 22. It is possible to use a waveguide capable of supporting third or higher order modes, but in this case it is necessary to use additional slots to suppress the modes of odd order. These slots are situated on either side of the median lines of the shorter sides at the nodal points of the TE 03 mode. They communicate with auxiliary waveguides or resonators designed to absorb the unwanted modes. It is stated that the attenuation is proportional to a factor C 1 /a+C 2 /b, where C 1 , C 2 are constants and a, b are the dimensions of the waveguide. By making a, b large enough, the losses are reduced compared with those of a normal rectangular waveguide. Coupling of the enlarged guide 13 to a normal waveguide 12 is effected by means of a linearly tapered rectangular section 14. The waveguide may contain H-plane bends, consisting of a section 35, Fig. 8, of bent waveguide, displaced, with respect to the straight sections 13, towards the centre of curvature of the bend. The resultant shoulders are closed with conductive material. This construction is stated to prevent coupling between the TE 01 and TE 02 modes. The waveguide may be sealed by means of a dielectric seal 40, Fig. 9, which is located in and matched to the waveguide by means of inductive projections 42 which extend across the longer walls.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL263902D NL263902A (en) | 1960-04-22 | ||
| GB14272/60A GB905689A (en) | 1960-04-22 | 1960-04-22 | Improvements in or relating to waveguide transmission systems |
| DED35896A DE1240957B (en) | 1960-04-22 | 1961-04-21 | Waveguide system for transmitting a microwave signal of a predetermined frequency with a metallic rectangular waveguide which is dimensioned such that it can transmit the signal in a plurality of modes |
| FR859433A FR1286529A (en) | 1960-04-22 | 1961-04-21 | Improvements to waveguide systems for the transmission of electrical signals |
| US104697A US3218586A (en) | 1960-04-22 | 1961-04-21 | Transmission of dominant transverse electric mode in large rectangular waveguide, with polarization parallel to width, by use of mode absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB14272/60A GB905689A (en) | 1960-04-22 | 1960-04-22 | Improvements in or relating to waveguide transmission systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB905689A true GB905689A (en) | 1962-09-12 |
Family
ID=10038159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB14272/60A Expired GB905689A (en) | 1960-04-22 | 1960-04-22 | Improvements in or relating to waveguide transmission systems |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US3218586A (en) |
| DE (1) | DE1240957B (en) |
| GB (1) | GB905689A (en) |
| NL (1) | NL263902A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2134720A (en) * | 1982-07-29 | 1984-08-15 | Siemens Ag | Vacuum-tight waveguide windows |
| US20220413218A1 (en) * | 2019-11-26 | 2022-12-29 | Nippon Telegraph And Telephone Corporation | Optical Waveguide |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3543199A (en) * | 1968-10-03 | 1970-11-24 | Us Air Force | Tapered mode selective absorber for use in high power waveguide systems |
| US3835423A (en) * | 1973-04-20 | 1974-09-10 | Adams Russel Co Inc | Broadband waveguide with means for suppressing te {11 {11 mode |
| DE3130209C2 (en) * | 1981-07-30 | 1984-05-03 | Siemens AG, 1000 Berlin und 8000 München | Cable for the transmission of electromagnetic energy in the microwave range |
| JP3879548B2 (en) * | 2002-03-20 | 2007-02-14 | 三菱電機株式会社 | Waveguide type demultiplexer |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2735069A (en) * | 1956-02-14 | Directional coupler | ||
| US2476034A (en) * | 1945-07-16 | 1949-07-12 | Bell Telephone Labor Inc | Conformal grating resonant cavity |
| US2673962A (en) * | 1949-01-18 | 1954-03-30 | Bell Telephone Labor Inc | Mode suppression in curved waveguide bends |
| US2684469A (en) * | 1949-06-23 | 1954-07-20 | Sperry Corp | Mode selective attenuator |
| US2764743A (en) * | 1949-12-30 | 1956-09-25 | Bell Telephone Labor Inc | Microwave frequency-selective mode absorber |
| GB671206A (en) * | 1950-08-04 | 1952-04-30 | Standard Telephones Cables Ltd | Improvements in or relating to electric impedance networks |
| US2869085A (en) * | 1954-01-19 | 1959-01-13 | Raytheon Mfg Co | Selective absorbers |
| GB801627A (en) * | 1955-09-02 | 1958-09-17 | Gen Electric Co Ltd | Improvements in or relating to apparatus of the kind including a waveguide |
| US2820965A (en) * | 1956-02-16 | 1958-01-21 | Itt | Dual polarization antenna |
| US2958834A (en) * | 1956-06-13 | 1960-11-01 | Varian Associates | Sealed wave guide window |
| US2981906A (en) * | 1957-10-14 | 1961-04-25 | Bell Telephone Labor Inc | Resistance sheet microwave device |
| US2981907A (en) * | 1957-10-18 | 1961-04-25 | Hughes Aircraft Co | Electromagnetic wave attenuator |
| US3076188A (en) * | 1958-06-04 | 1963-01-29 | Decca Ltd | Adjustable polarization waveguide for radar |
| US3078423A (en) * | 1959-09-30 | 1963-02-19 | David J Lewis | Apparatus for segregating harmonic power in a waveguide system |
-
0
- NL NL263902D patent/NL263902A/xx unknown
-
1960
- 1960-04-22 GB GB14272/60A patent/GB905689A/en not_active Expired
-
1961
- 1961-04-21 US US104697A patent/US3218586A/en not_active Expired - Lifetime
- 1961-04-21 DE DED35896A patent/DE1240957B/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2134720A (en) * | 1982-07-29 | 1984-08-15 | Siemens Ag | Vacuum-tight waveguide windows |
| US20220413218A1 (en) * | 2019-11-26 | 2022-12-29 | Nippon Telegraph And Telephone Corporation | Optical Waveguide |
Also Published As
| Publication number | Publication date |
|---|---|
| US3218586A (en) | 1965-11-16 |
| NL263902A (en) | |
| DE1240957B (en) | 1967-05-24 |
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