GB1354974A - Waveguide filters - Google Patents
Waveguide filtersInfo
- Publication number
- GB1354974A GB1354974A GB4094071A GB1354974DA GB1354974A GB 1354974 A GB1354974 A GB 1354974A GB 4094071 A GB4094071 A GB 4094071A GB 1354974D A GB1354974D A GB 1354974DA GB 1354974 A GB1354974 A GB 1354974A
- Authority
- GB
- United Kingdom
- Prior art keywords
- section
- waveguide
- sections
- frequency
- reactance
- 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
- H01P1/219—Evanescent mode filters
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
- Optical Integrated Circuits (AREA)
Abstract
1354974 Waveguide filters STANDARD TELEPHONES & CABLES Ltd 30 Aug 1972 [2 Sept 1971] 40940/71 Heading H1W A multiple-section evanescent-mode waveguide band-pass filter has reactive loading midway between the cavities. Filters of this kind consist of a length 1 of waveguide which is dimensioned to have a cut-off frequency above the required operating frequency. A section of such waveguide presents an inductive reactance to an incident H 01 -mode wave, and if this section is terminated in an obstacle which presents a conjugate (capacitive) reactance at the operative frequency, the section will transmit energy at that frequency. The Tchebychev filter shown comprises six sections each associated with a capacitive reactance in the form of an adjustable quartz rod 3, the sections being arranged symmetrically such that l 1 = l 7 , l 2 = l 6 , l 3 = l 5 . The sections are coupled by inductive rods 7 spaced from one wall of the waveguide by a distance d which varies from section to section, again in a symmetrical manner. It is stated that the sections may, alternatively, be coupled by capacitive reactances. The theory of the filter is completely discussed in the Specification and dimensional data given.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4094071 | 1971-09-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1354974A true GB1354974A (en) | 1974-06-05 |
Family
ID=10417347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4094071A Expired GB1354974A (en) | 1971-09-02 | 1971-09-02 | Waveguide filters |
Country Status (9)
| Country | Link |
|---|---|
| AU (1) | AU474680B2 (en) |
| BE (1) | BE788207R (en) |
| CH (1) | CH552895A (en) |
| DE (1) | DE2242514A1 (en) |
| ES (1) | ES406293A2 (en) |
| FR (1) | FR2151118B2 (en) |
| GB (1) | GB1354974A (en) |
| IT (1) | IT964198B (en) |
| ZA (1) | ZA724728B (en) |
-
0
- BE BE788207D patent/BE788207R/en active
-
1971
- 1971-09-02 GB GB4094071A patent/GB1354974A/en not_active Expired
-
1972
- 1972-07-11 ZA ZA724728A patent/ZA724728B/en unknown
- 1972-08-24 IT IT28435/72A patent/IT964198B/en active
- 1972-08-28 AU AU46036/72A patent/AU474680B2/en not_active Expired
- 1972-08-30 CH CH1276672A patent/CH552895A/en not_active IP Right Cessation
- 1972-08-30 DE DE2242514A patent/DE2242514A1/en active Pending
- 1972-09-01 ES ES406293A patent/ES406293A2/en not_active Expired
- 1972-09-04 FR FR7231267A patent/FR2151118B2/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2151118A2 (en) | 1973-04-13 |
| IT964198B (en) | 1974-01-21 |
| CH552895A (en) | 1974-08-15 |
| ZA724728B (en) | 1973-04-25 |
| DE2242514A1 (en) | 1973-03-08 |
| BE788207R (en) | 1973-02-28 |
| AU4603672A (en) | 1974-03-07 |
| AU474680B2 (en) | 1976-07-29 |
| ES406293A2 (en) | 1975-07-16 |
| FR2151118B2 (en) | 1976-01-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| 435 | Patent endorsed 'licences of right' on the date specified (sect. 35/1949) | ||
| PCNP | Patent ceased through non-payment of renewal fee |