EP0250857A2 - Filtre à micro-ondes - Google Patents
Filtre à micro-ondes Download PDFInfo
- Publication number
- EP0250857A2 EP0250857A2 EP87107533A EP87107533A EP0250857A2 EP 0250857 A2 EP0250857 A2 EP 0250857A2 EP 87107533 A EP87107533 A EP 87107533A EP 87107533 A EP87107533 A EP 87107533A EP 0250857 A2 EP0250857 A2 EP 0250857A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- wave mode
- coupling
- cavity
- wave
- cavity 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.)
- Granted
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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
- H01P1/207—Hollow waveguide filters
- H01P1/208—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
- H01P1/2082—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure with multimode resonators
Definitions
- the present invention relates to a microwave filter, consisting of at least two cavity resonators, in each of which at least one TE or TM wave mode exists, with a coupling between the wave modes of both cavity resonators taking place via a coupling aperture present between two adjacent cavity resonators.
- Such a microwave filter is for example from DE-PS 21 22 337 or IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, VOL. MIT-32, No. 11, Nov. 1984, pp. 1449-1454.
- the resonance circuits of the microwave filters on which these are based are realized by TE and / or TM wave modes which resonate in the individual cavity resonators.
- the characteristic of such a microwave filter depends on which orthogonally polarized wave modes exist in the individual cavity resonators and which of these wave modes are coupled to one another. Couplings between the wave modes existing in each individual cavity resonator and couplings between wave modes in different cavity resonators come into question. Cross-cavity resonance wave mode couplings take place via coupling apertures with coupling openings therein.
- the invention is based on the object of specifying a microwave filter of the type mentioned at the outset which, compared to the prior art, offers further possibilities for realizing filter characteristics.
- the microwave filter shown in FIG. 1 consists of two cylindrical cavity resonators HR1 and HR2, of which the first cavity resonator HR1 has an input E for coupling in a microwave signal and the second cavity resonator HR2 has an output A for coupling out a signal.
- the various known possibilities of coupling and decoupling microwave signals will not be discussed in more detail here.
- the direction of the E field lines of the TE11n wave mode shown in FIG. 2b corresponds to its direction of polarization.
- Fig. 2a shows the TMO1p wave mode. Its E field lines run in the direction of wave propagation, the direction of polarization (see arrow R5) of this TMO1p wave mode.
- each individual cavity resonator can be connected by discontinuity coupling elements, e.g. Tuning screws, which are embedded in the cavity wall in a known manner, are coupled.
- Couplings of the wave modes of the one cavity resonator HR1 with wave modes of the other cavity resonator HR2 take place via a coupling aperture KB arranged between the two adjacent cavity resonators.
- a slot-shaped coupling opening K1 is arranged off-center in the coupling aperture KB. Namely, this coupling opening lies at a point where the magnetic field lines or components of the TE11n wave mode of the resonance circuit R1 in the first cavity HR1 and the magnetic field lines of the TMO1p wave mode of the resonance circuit R5 in the second cavity HR2 run parallel to one another. Thus, these two wave modes are coupled via the coupling opening K1.
- the TE11n wave mode of the resonant circuit R1 of the first cavity resonator HR1 is also polarized with the same TE11n wave mode of the resonant circuit R4 coupled in the second cavity HR2.
- a coupling between the TE11n wave mode of the resonance circuit R2 in the first cavity resonator HR1 and the TMO1p wave mode of the resonance circuit R5 and also the TE11n -Wave mode of the resonant circuit R3 in the second cavity HR2 can be effected.
- a very simple coupling opening structure can be used to achieve a large number of couplings between differently designed or differently polarized wave modes of adjacent cavity resonators.
- the choice of dimensioning and the position of the coupling opening determine the frequency at which a wave mode coupling takes place and how large the coupling degree is.
- the microwave filter consisted of only two cavity resonators.
- filters can also be constructed from more than just two cavity resonators, with one (single-mode) two (dual-mode) or three wave modes (triple-mode) existing in each individual cavity resonator, which can be coupled to one another depending on the desired filter characteristic.
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3621299 | 1986-06-25 | ||
DE19863621299 DE3621299A1 (de) | 1986-06-25 | 1986-06-25 | Mikrowellenfilter |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0250857A2 true EP0250857A2 (fr) | 1988-01-07 |
EP0250857A3 EP0250857A3 (en) | 1988-12-07 |
EP0250857B1 EP0250857B1 (fr) | 1992-07-15 |
Family
ID=6303682
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87107533A Expired - Lifetime EP0250857B1 (fr) | 1986-06-25 | 1987-05-23 | Filtre à micro-ondes |
Country Status (4)
Country | Link |
---|---|
US (1) | US4734665A (fr) |
EP (1) | EP0250857B1 (fr) |
CA (1) | CA1271532A (fr) |
DE (2) | DE3621299A1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2675952A1 (fr) * | 1991-04-29 | 1992-10-30 | Alcatel Telspace | Filtre hyperfrequence a une ou plusieurs cavites resonnantes. |
EP2432070A1 (fr) * | 2010-09-20 | 2012-03-21 | COM DEV International Ltd. | Ensemble de filtre de cavité à mode double Q super |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5012211A (en) * | 1987-09-02 | 1991-04-30 | Hughes Aircraft Company | Low-loss wide-band microwave filter |
US5254963A (en) * | 1991-09-25 | 1993-10-19 | Comsat | Microwave filter with a wide spurious-free band-stop response |
DE19523220A1 (de) * | 1995-06-27 | 1997-01-02 | Bosch Gmbh Robert | Mikrowellenfilter |
IT1284353B1 (it) * | 1996-01-30 | 1998-05-18 | Cselt Centro Studi Lab Telecom | Cavita' multimodale per filtri in guida d'onda. |
IT1284354B1 (it) * | 1996-01-30 | 1998-05-18 | Cselt Centro Studi Lab Telecom | Cavita' multimodale per filtri n guida d'onda. |
US5774030A (en) * | 1997-03-31 | 1998-06-30 | Hughes Electronics Corporation | Parallel axis cylindrical microwave filter |
US7982561B2 (en) * | 2008-09-05 | 2011-07-19 | Harris Corporation | Resonator system for an RF power amplifier output circuit |
CN112436260A (zh) * | 2020-11-25 | 2021-03-02 | 苏州灿勤通讯技术有限公司 | 新型te模介质谐振器 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3697898A (en) * | 1970-05-08 | 1972-10-10 | Communications Satellite Corp | Plural cavity bandpass waveguide filter |
US3646481A (en) * | 1971-03-12 | 1972-02-29 | Bell Telephone Labor Inc | Waveguide mode transducer |
US4129840A (en) * | 1977-06-28 | 1978-12-12 | Rca Corporation | Array of directional filters |
-
1986
- 1986-06-25 DE DE19863621299 patent/DE3621299A1/de not_active Withdrawn
-
1987
- 1987-05-23 EP EP87107533A patent/EP0250857B1/fr not_active Expired - Lifetime
- 1987-05-23 DE DE8787107533T patent/DE3780367D1/de not_active Expired - Lifetime
- 1987-06-23 US US07/065,566 patent/US4734665A/en not_active Expired - Fee Related
- 1987-06-23 CA CA000540336A patent/CA1271532A/fr not_active Expired - Fee Related
Non-Patent Citations (3)
Title |
---|
1986 IEEE-MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST, Baltimore, Maryland, 2.-4. Juni 1986, Baltimore, Seiten 349-351, IEEE, New York, US; W.C. TANG: "An 8-pole quazi-elliptic function filter realized in 3 dielectric resonator cavities" * |
1986 IEEE-MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST, Baltimore, Maryland, 2.-4. Juni 1986, Baltimore, Seiten 357-359, IEEE, New York, US; D. SIU: "Realization of an exact 5-pole elliptic function filter employing dielectric loaded triple-dual-mode cavity structure" * |
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, Band MTT-24, Nr. 10, Oktober 1976, Seiten 640-648; A.E. ATIA et al.: "General TE011-mode waveguide bandpass filters" * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2675952A1 (fr) * | 1991-04-29 | 1992-10-30 | Alcatel Telspace | Filtre hyperfrequence a une ou plusieurs cavites resonnantes. |
EP2432070A1 (fr) * | 2010-09-20 | 2012-03-21 | COM DEV International Ltd. | Ensemble de filtre de cavité à mode double Q super |
US8665039B2 (en) | 2010-09-20 | 2014-03-04 | Com Dev International Ltd. | Dual mode cavity filter assembly operating in a TE22N mode |
Also Published As
Publication number | Publication date |
---|---|
DE3621299A1 (de) | 1988-01-07 |
DE3780367D1 (de) | 1992-08-20 |
EP0250857B1 (fr) | 1992-07-15 |
CA1271532A (fr) | 1990-07-10 |
US4734665A (en) | 1988-03-29 |
EP0250857A3 (en) | 1988-12-07 |
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