GB980075A - Improvements in or relating to high frequency filters - Google Patents
Improvements in or relating to high frequency filtersInfo
- Publication number
- GB980075A GB980075A GB18088/60A GB1808860A GB980075A GB 980075 A GB980075 A GB 980075A GB 18088/60 A GB18088/60 A GB 18088/60A GB 1808860 A GB1808860 A GB 1808860A GB 980075 A GB980075 A GB 980075A
- Authority
- GB
- United Kingdom
- Prior art keywords
- filters
- pass
- filter
- terminations
- input
- 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
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
- H01P1/2133—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies using coaxial filters
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
980,075. Filters. MARCONI CO. Ltd. Feb. 15, 1961 [May 23, 1960], No. 18088/60. Heading H1W. [Also in Division H4] A filter comprises a 3 db. directional coupler the four ports of which comprise an input, an output and two reactive terminations. The coupler comprises two parallel conductors C1, C2 arranged in a conductive casing C3 with input and output at opposite ends. The reactive terminations T1, T2 comprise respectively a coaxial stub which is one quarter-wavelength long at the cut-off frequency and a section of coaxial line the length of which determines the characteristics of the filter. The operation of the filter depends upon the difference in the phase reflection coefficients of the terminations and these may be arranged to give low-pass, high-pass or band-pass characteristics. In the diplexing arrangement of Fig. 4, two such filters F1, F2 are arranged in the connections between two pairs of corresponding arms of hybrid networks H1, H2. The latter may comprise directional couplers similar to the ones used in the filters. The characteristics required of the filters depends upon the mode of connection of the two generators, the load and the balancing impedance to the terminals 1 to 4.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB18088/60A GB980075A (en) | 1960-05-23 | 1960-05-23 | Improvements in or relating to high frequency filters |
DE1961M0048949 DE1616673B1 (en) | 1960-05-23 | 1961-05-05 | Filter arrangement for high frequencies |
FR862477A FR1289374A (en) | 1960-05-23 | 1961-05-23 | Improvements to high frequency filters |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB18088/60A GB980075A (en) | 1960-05-23 | 1960-05-23 | Improvements in or relating to high frequency filters |
Publications (1)
Publication Number | Publication Date |
---|---|
GB980075A true GB980075A (en) | 1965-01-13 |
Family
ID=10106452
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB18088/60A Expired GB980075A (en) | 1960-05-23 | 1960-05-23 | Improvements in or relating to high frequency filters |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE1616673B1 (en) |
FR (1) | FR1289374A (en) |
GB (1) | GB980075A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2112037C2 (en) * | 1971-03-12 | 1982-10-07 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Microwave channel switching device - uses successive hybrids coupled via all=pass circuit with differing phase response |
DE2541593C2 (en) * | 1975-09-18 | 1984-01-05 | ANT Nachrichtentechnik GmbH, 7150 Backnang | Frequency-periodic microwave channel filter with high selectivity |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE885764C (en) * | 1941-08-22 | 1953-08-06 | Telefunken Gmbh | Switchable bridge filter |
US2531447A (en) * | 1947-12-05 | 1950-11-28 | Bell Telephone Labor Inc | Hybrid channel-branching microwave filter |
-
1960
- 1960-05-23 GB GB18088/60A patent/GB980075A/en not_active Expired
-
1961
- 1961-05-05 DE DE1961M0048949 patent/DE1616673B1/en active Pending
- 1961-05-23 FR FR862477A patent/FR1289374A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR1289374A (en) | 1962-03-30 |
DE1616673B1 (en) | 1970-03-12 |
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