ES341650A1 - Waveguide filter - Google Patents
Waveguide filterInfo
- Publication number
- ES341650A1 ES341650A1 ES341650A ES341650A ES341650A1 ES 341650 A1 ES341650 A1 ES 341650A1 ES 341650 A ES341650 A ES 341650A ES 341650 A ES341650 A ES 341650A ES 341650 A1 ES341650 A1 ES 341650A1
- Authority
- ES
- Spain
- Prior art keywords
- waveguide
- length
- filter
- capacitances
- band
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C19/00—Chemical modification of rubber
- C08C19/28—Reaction with compounds containing carbon-to-carbon unsaturated bonds
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
A band-pass filter for H-mode waveguides comprises a length of waveguide, Àe.g. rectangular waveguide, which is dimensioned below cut-off such that it supports only evanescent waves and means for terminating the length in a capacitative reactance which at a chosen centre frequency is the conjugate of the positive imaginary characteristic impedance of the length of waveguide. The specification explains the theory of such filters and shows that the band-pass limits are given by where the symbols have their usual meanings. The centre frequency is given by f 0 = #f 1 f 2 . Fig. 1 shows a three-section filter in which the capacitances are provided by screws 4. In a modification of this construction (Fig. 6, not shown), the capacitances, are provided by transverse ridges. In a modified method of realization (Fig. 7, not shown), the capacitance is provided by an appropriate length (11) of short-circuited standard (propagating) waveguide joined to the end of the length (10) of cut-off waveguide. The filter section thus formed is coupled to a standard dominant mode waveguide as a shunt or series stub (Figs. 9, 10, not shown).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB25966/66A GB1129185A (en) | 1966-06-10 | 1966-06-10 | Improvements in or relating to waveguide filters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES341650A1 true ES341650A1 (en) | 1968-07-01 |
Family
ID=10236200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES341650A Expired ES341650A1 (en) | 1966-06-10 | 1967-06-10 | Waveguide filter |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3621483A (en) |
| CH (1) | CH474871A (en) |
| DE (1) | DE1541937C3 (en) |
| ES (1) | ES341650A1 (en) |
| GB (1) | GB1129185A (en) |
| SE (1) | SE344388B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3851281A (en) * | 1973-06-11 | 1974-11-26 | Raytheon Co | Impedance matched waveguide device |
| US4761625A (en) * | 1986-06-20 | 1988-08-02 | Rca Corporation | Tunable waveguide bandpass filter |
| US6232853B1 (en) | 1999-03-12 | 2001-05-15 | Com Dev Limited | Waveguide filter having asymmetrically corrugated resonators |
| US6169466B1 (en) | 1999-05-10 | 2001-01-02 | Com Dev Limited | Corrugated waveguide filter having coupled resonator cavities |
| JP2003087004A (en) * | 2001-09-10 | 2003-03-20 | Tdk Corp | Band-pass filter |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2231602A (en) * | 1937-03-20 | 1941-02-11 | American Telephone & Telegraph | Multiplex high frequency signaling |
| US2197123A (en) * | 1937-06-18 | 1940-04-16 | Bell Telephone Labor Inc | Guided wave transmission |
| US2432093A (en) * | 1942-07-30 | 1947-12-09 | Bell Telephone Labor Inc | Wave transmission network |
| US2376785A (en) * | 1943-02-05 | 1945-05-22 | Westinghouse Electric & Mfg Co | Adjustable attenuator |
| US2427098A (en) * | 1943-10-23 | 1947-09-09 | Rca Corp | Variable attenuator for centimeter waves |
| US2557110A (en) * | 1945-02-17 | 1951-06-19 | Sperry Corp | Wave guide attenuator apparatus |
| US2706276A (en) * | 1946-05-03 | 1955-04-12 | Maurice B Hall | Cut-off waveguide attenuator |
| US2588103A (en) * | 1946-09-14 | 1952-03-04 | Bell Telephone Labor Inc | Wave guide coupling between coaxial lines |
| US2659870A (en) * | 1947-07-10 | 1953-11-17 | Polytechnic Inst Brooklyn | Mode filtered cutoff attenuator |
| US2531447A (en) * | 1947-12-05 | 1950-11-28 | Bell Telephone Labor Inc | Hybrid channel-branching microwave filter |
| US2623120A (en) * | 1950-04-20 | 1952-12-23 | Bell Telephone Labor Inc | Microwave filter |
| US2724805A (en) * | 1950-12-02 | 1955-11-22 | Louis D Smullin | Microwave apparatus |
| US2816270A (en) * | 1951-06-26 | 1957-12-10 | Bell Telephone Labor Inc | Microwave channel dropping filter pairs |
| US2866949A (en) * | 1953-10-29 | 1958-12-30 | Bell Telephone Labor Inc | Microwave circulators, isolators, and branching filters |
| US3215955A (en) * | 1964-06-01 | 1965-11-02 | Motorola Inc | Waveguide switching by variable tuning of a cavity which shunts a band-pass 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 |
| GB1157449A (en) * | 1965-08-11 | 1969-07-09 | Nippon Electric Co | Improvements in or relating to a High-Frequency Filter |
-
1966
- 1966-06-10 GB GB25966/66A patent/GB1129185A/en not_active Expired
-
1967
- 1967-06-02 US US643279A patent/US3621483A/en not_active Expired - Lifetime
- 1967-06-07 DE DE1541937A patent/DE1541937C3/en not_active Expired
- 1967-06-08 CH CH814967A patent/CH474871A/en not_active IP Right Cessation
- 1967-06-08 SE SE8035/67A patent/SE344388B/xx unknown
- 1967-06-10 ES ES341650A patent/ES341650A1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1129185A (en) | 1968-10-02 |
| DE1541937C3 (en) | 1975-05-22 |
| DE1541937B2 (en) | 1974-10-03 |
| US3621483A (en) | 1971-11-16 |
| DE1541937A1 (en) | 1970-05-06 |
| CH474871A (en) | 1969-06-30 |
| SE344388B (en) | 1972-04-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FD1A | Patent lapsed |
Effective date: 19880220 |