CA2209419C - Input coupling adjustment arrangement for radio frequency filters - Google Patents
Input coupling adjustment arrangement for radio frequency filters Download PDFInfo
- Publication number
- CA2209419C CA2209419C CA002209419A CA2209419A CA2209419C CA 2209419 C CA2209419 C CA 2209419C CA 002209419 A CA002209419 A CA 002209419A CA 2209419 A CA2209419 A CA 2209419A CA 2209419 C CA2209419 C CA 2209419C
- Authority
- CA
- Canada
- Prior art keywords
- input port
- radio frequency
- port means
- frequency filter
- resonator
- 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 - Fee Related
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
- H01P1/201—Filters for transverse electromagnetic waves
- H01P1/205—Comb or interdigital filters; Cascaded coaxial cavities
- H01P1/2053—Comb or interdigital filters; Cascaded coaxial cavities the coaxial cavity resonators being disposed parall to each other
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/04—Coupling devices of the waveguide type with variable factor of coupling
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
An arrangement for adjustably coupling a radio frequency input port to a resonator element of the filter. The arrangement comprises a resilient conductor (19) which extends from the input port (15) into the electric field of a resonator element (2).
The remote end of the resilient conductor resiliently abuts the point (20) of an adjustment screw (20a). Operating the screw moves the resilient conductor in relation to the electric field and alters the capacitive coupling between the input port and the resonator element for fine tuning the impedance match of the input to the filter.
The remote end of the resilient conductor resiliently abuts the point (20) of an adjustment screw (20a). Operating the screw moves the resilient conductor in relation to the electric field and alters the capacitive coupling between the input port and the resonator element for fine tuning the impedance match of the input to the filter.
Claims (7)
1. A radio frequency filter comprising a housing means containing at least one resonator element, an input port means and at least one output port means, said filter further including an arrangement for adjustably coupling said input port means to at least one resonator element, said arrangement comprising an elongated resilient conductor element of a predetermined dimension arranged to capacitively couple said input port means to said at least one resonator element's electric field zone, wherein said resilient conductor element is arranged to co-operate with lever means of electrical insulating material that can be manually activated by a connected actuating means mounted externally in a wall of said housing means, to move said resilient conductive element thereby adjusting capacitive coupling between said input port means and said resonator element's electric field.
2. A radio frequency filter as claimed in claim 1, wherein said resilient conductor extends from a part of the input port means such that the resilient conductor's free end resiliently abuts said lever means.
3. A radio frequency filter as claimed in claim 1 or 2, wherein said actuating means is a screw whose point forms the said lever means.
4. A radio frequency filter as claimed in any one of the preceding claim, wherein said at least one resonator element is a co-axial resonator.
5. A radio frequency filter as claimed in claim 4, comprising a plurality of the coaxial resonators.
6. A radio frequency filter comprising a housing means containing a first array of coupled resonator elements and an adjoining second array of coupled resonator elements, an input port means common to both arrays and respective output port means for each array, said filter further including an arrangement for adjustably coupling said input port means to a first resonator element in each array, said arrangement comprising an elongated resilient conductor extending from a part of said input port means to a first resonator elements' electric field zone, each end portion of said resilient conductor resiliently abutting the point of a respective adjustment screw of a electrical insulating material mounted in a wall of said housing and whose screw heads are outside said housing, whereby co-operation of respective screws moves associated end portions of said resilient conductor thereby adjusting capacitive coupling between said input port means and an associated resonator elements electric field.
7. A radio frequency filter as claimed in any one of the preceding claims, wherein said electrical insulating material is aluminium oxide.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPO0764 | 1996-07-01 | ||
| AUPO0764A AUPO076496A0 (en) | 1996-07-01 | 1996-07-01 | Input coupling adjustment arrangement for radio frequency filters |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2209419A1 CA2209419A1 (en) | 1998-01-01 |
| CA2209419C true CA2209419C (en) | 2000-08-15 |
Family
ID=3795080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002209419A Expired - Fee Related CA2209419C (en) | 1996-07-01 | 1997-06-30 | Input coupling adjustment arrangement for radio frequency filters |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0817301B1 (en) |
| AU (1) | AUPO076496A0 (en) |
| CA (1) | CA2209419C (en) |
| DE (1) | DE69715329T2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19926571A1 (en) * | 1999-06-11 | 2000-12-14 | Bosch Gmbh Robert | Microwave filter |
| US9467193B2 (en) * | 2014-03-28 | 2016-10-11 | Innertron, Inc. | Multi-band filter |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB849490A (en) * | 1957-09-24 | 1960-09-28 | Gen Electric Co Ltd | Improvements in or relating to coupling devices for coupling a coaxial transmission line to an electrical device |
| DE3028925A1 (en) * | 1980-07-30 | 1982-02-11 | Siemens AG, 1000 Berlin und 8000 München | Quarter wave branch connector for HF aerials - has junction with coupling loops at input resonators of twin parallel filters |
| FR2629276B1 (en) * | 1988-03-23 | 1991-06-07 | Alcatel Thomson Faisceaux | ADJUSTING MICROWAVE DEVICE FOR A PLANAR WAVE-LINE TRANSITION |
| DE4005230A1 (en) * | 1990-02-20 | 1991-08-22 | Bosch Gmbh Robert | UHF filter circuitry - has extra conductor, as output coupling bracket, adjacent to output circuit |
| FR2722338B1 (en) * | 1994-07-07 | 1996-09-13 | Europ Communities | COUPLING AND ADAPTING DEVICE FOR TRANSMITTING HIGH FREQUENCY OR MICROWAVE SIGNALS |
-
1996
- 1996-07-01 AU AUPO0764A patent/AUPO076496A0/en not_active Abandoned
-
1997
- 1997-06-30 CA CA002209419A patent/CA2209419C/en not_active Expired - Fee Related
- 1997-07-01 DE DE69715329T patent/DE69715329T2/en not_active Expired - Lifetime
- 1997-07-01 EP EP97110682A patent/EP0817301B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0817301A1 (en) | 1998-01-07 |
| AUPO076496A0 (en) | 1996-07-25 |
| DE69715329T2 (en) | 2003-05-22 |
| EP0817301B1 (en) | 2002-09-11 |
| DE69715329D1 (en) | 2002-10-17 |
| CA2209419A1 (en) | 1998-01-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |