DE102008053013A1 - Band pass filter i.e. comb line filter, has set of electromagnetically coupled coaxial resonators, and conductive elements coupled at first resonator after input of filter and/or at last resonator before output of filter - Google Patents
Band pass filter i.e. comb line filter, has set of electromagnetically coupled coaxial resonators, and conductive elements coupled at first resonator after input of filter and/or at last resonator before output of filter Download PDFInfo
- Publication number
- DE102008053013A1 DE102008053013A1 DE200810053013 DE102008053013A DE102008053013A1 DE 102008053013 A1 DE102008053013 A1 DE 102008053013A1 DE 200810053013 DE200810053013 DE 200810053013 DE 102008053013 A DE102008053013 A DE 102008053013A DE 102008053013 A1 DE102008053013 A1 DE 102008053013A1
- Authority
- DE
- Germany
- Prior art keywords
- filter
- resonator
- conductive elements
- input
- coaxial
- 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.)
- Ceased
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
- H01P1/2136—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies using comb or interdigital filters; using cascaded coaxial cavities
-
- 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
- H01P1/2056—Comb filters or interdigital filters with metallised resonator holes in a dielectric block
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft ein Bandpass-Filter mit elektromagnetisch verkoppelten Resonatoren, das eine Reihe von Funktionen, die bisher nur durch entsprechende Zusammenschaltung von Einzelkomponenten realisiert werden konnten, in sich vereint.The The present invention relates to a bandpass filter with electromagnetic coupled resonators, which have a number of features previously only realized by appropriate interconnection of individual components could be united in one another.
In den aus dem Stand der Technik bekannten Bandpass-Filtern, die durchaus auch sehr kleine Einfügedämpfungen besitzen können (s. [1], [2]) oder darüber hinaus die geforderte Leistungsbelastbarkeit aufweisen (s. [4], [5]) oder aber die Forderungen nach symmetrischen Eingangs- und Ausgangssignalen erfüllen (s. [6], [7], [8]) werden aber nicht die Möglichkeiten der Leistungsteilung oder -addition in Verbindung mit den anderen o. g. Eigenschaften als komplexe Eigenschaften eines Filternetzwerkes gesehen und damit applikativ nicht wirksam, sondern immer nur als anwendungsspezifische Unikate vorgestellt. Die genannten Eigenschaften wurden bisher durch die Zusammenschaltung einer entsprechenden Anzahl von zusätzlichen Baugruppen, wie Symmetriergliedern (Balun), Leistungsteilern, Impedanztransformatoren und ggf. Tiefpässen (zur Verbesserung des Sperrbereichsverhaltens) zum eigentlichen Bandpass-Filter realisiert.In the well-known from the prior art bandpass filters that quite also very small insertion losses can own (see [1], [2]) or above have the required power handling capacity (see [4]), [5]) or the demands for symmetric input and Fulfill output signals (see [6], [7], [8]) are not the possibilities of power sharing or addition in conjunction with the other o. g. properties seen as complex properties of a filtering network and thus Applicative not effective, but always only as application-specific Uniques presented. The above properties have been through the interconnection of a corresponding number of additional Assemblies, such as baluns (Balun), power dividers, impedance transformers and if necessary, low-passes (to improve the stopband response) to the actual bandpass filter realized.
Jede zusätzliche Baugruppe bedingt jedoch eine Verschlechterung des Gesamtverhaltens eines Netzwerkes, was zum einen durch die zusätzlichen (z. B. koaxialen) Steckverbinder bzw. notwendigen externen Verbindungstechniken, die ja selbst verlustbehaftet sind, begründet ist und zum anderen durch die Verluste in den jeweiligen Baugruppen selbst.each additional Assembly, however, causes a deterioration of the overall behavior of a network, partly due to the additional (eg coaxial) Connector or necessary external connection techniques, the yes are lossy, well founded and secondly by the Losses in the respective modules themselves.
Darüber hinaus sind die Kosten solcher Zusatzbaugruppen, insbesondere in Koaxialtechnik nicht unbeträchtlich, welche mit der Erfindung vollständig vermieden werden.Furthermore are the cost of such additional modules, especially in coaxial technology not inconsiderable which is complete with the invention be avoided.
Zusätzlich verringert die erfindungsgemäße Realisierung das erforderliche Aufbauvolumen und Gewicht eines Netzwerkes bzw. hilft in nicht unbeträchtlichem Umfang Material und vergegenständlichte Arbeit einzusparen. Außerdem steigt die Zuverlässigkeit einer technischen Anordnung (MTBF), wenn die Anzahl der beteiligten Funktionselemente verringert wird.Additionally reduced the realization of the invention the required volume and weight of a network or helps in not inconsiderable Scope of material and objectified Save work. Furthermore the reliability increases a technical arrangement (MTBF), if the number of involved Function elements is reduced.
Aufgabe der vorliegenden Erfindung ist es deshalb, die Nachteile aus dem Stand der Technik zu überwinden und ein Bandpass-Filter bereitzustellen, das die Funktionen der Symmetrierung von hochfrequenten Signalen in Verbindung mit Bandpässen mit zusätzlicher Leistungsteilung bzw. -addition und zusätzlicher Impedanztransformation zwischen Filterein- und Filterausgang sowie hoher Leistungsbelastbarkeit und geringer Einfügedämpfung (< 0,5 dB) bei bevorzugter Ausführung mit hochgütigen Resonatoren und gleichzeitigem gutem Sperrbereichsverhalten mittels motorischer Abstimmung (> 1 Oktave) ermöglicht.task Therefore, the disadvantages of the present invention are the disadvantages of the present invention Prior art overcome and provide a bandpass filter that performs the functions of Symmetrization of high-frequency signals in conjunction with bandpasses with additional Power division or addition and additional impedance transformation between filter inlet and Filter output and high power handling and low insertion loss (<0.5 dB) at more preferred execution with high-kind Resonators and at the same time good barrier area behavior by means of motorized tuning (> 1 Octave).
Erfindungsgemäß gelingt die Lösung dieser Aufgabe mit den Merkmalen des ersten Patentanspruches.According to the invention succeeds the solution this task with the features of the first claim.
Vorteilhafte Ausgestaltungen der erfindungsgemäßen Lösung sind in den Unteransprüchen angegeben.advantageous Embodiments of the solution according to the invention are specified in the subclaims.
Erfindungsgemäß werden die prinzipiellen Eigenschaften eines selektiven Netzwerkes in Verbindung mit den erforderlichen elektromagnetischen Koppelmechanismen der Resonatoren bzw. Koppeleinrichtungen zur Leistungsein- bzw. -auskopplung ausgenutzt.According to the invention the principal characteristics of a selective network in connection with the necessary electromagnetic coupling mechanisms of Resonators or coupling devices exploited for power input and output.
Da jedes selektive Netzwerk auch über transformatorische Eigenschaften verfügt, liegt es nahe, diese mit auszunutzen, was prinzipiell nicht neu ist. Neu in diesem Zusammenhang ist das Ausnutzen der Möglichkeit, an die jeweiligen Endresonatoren eines Bandpasses mit elektromagnetisch verkoppelten Resonatoren (wie z. B. Kammleitungsfilter, Interdigitalfilter) mehr als nur ein Leitungselement zum Signalabgriff anzukoppeln, was damit zu den gewünschten Eigenschaften der Leistungsteilung bzw. -addition führt. Diese Leistungselemente können je nach Bedarf symmetrisch bzw. unsymmetrisch ausgeführt werden, ohne dabei die Eigenschaften der Leistungsaufteilung, der Filterkennwerte, des vorgesehenen Transformationsverhältnisses und der Leistungsbelastbarkeit zu beeinflussen. Die Anzahl der möglichen leistungsteilenden Signalausgänge ist theoretisch unbeschränkt, ist aber in der Praxis schaltungstechnischen (konstruktiven) Restriktionen unterworfen.There every selective network also via transformatory Features, it makes sense to exploit these, which is not new in principle is. New in this context is the exploitation of the possibility to the respective end resonators of a bandpass with electromagnetic coupled resonators (such as comb filter, interdigital filter) to couple more than one line element to the signal tap, what the desired Characteristics of the power division or addition leads. These Power elements can be executed symmetrically or asymmetrically as needed, without the characteristics of the power distribution, the filter characteristics, the intended transformation ratio and the power handling capacity to influence. The number of possible power sharing signal outputs is theoretically unlimited, However, in practice it is subject to circuit (constructional) restrictions.
Die erfindungsgemäße Modifizierung eines elektromagnetisch verkoppelten Filternetzwerkes ist nicht an spezielle technologische Ausführungen (Planarleitunstechniken, Koaxialtechnik) gebunden.The inventive modification an electromagnetically coupled filter network is not to special technological designs (Planarleitunstechniken, coaxial technology) bound.
In
den
In
In
In
diesem Zusammenhang ist es wichtig zu betonen, dass sowohl in
Da es sich bei dem erfindungsgemäßen Bandpass-Filter um ein lineares, passives Filter handelt, gilt das Reziprozitätsgesetz, wonach alle Eingänge auch als Ausgänge fungieren können und alle Ausgänge auch als Eingänge, so dass die erfindungsgemäßen Eigenschaften der Leistungsteilung auch als Eigenschaften der Leistungsaddition (von verschiedenen Quellen, die sowohl symmetrische als auch unsymmetrische (koaxiale) Ausgänge besitzen können) verstanden werden müssen.There it is the bandpass filter according to the invention is a linear, passive filter, the law of reciprocity applies, after which all inputs also as exits can act and all outputs also as entrances, so that the properties of the invention the power division also as characteristics of the power addition (from different sources, both symmetric and unbalanced (coaxial) outputs can own) need to be understood.
Darüber hinaus ergeben sich in Verbindung mit weiteren speziellen Eigenschaften ausgewählter Filtertopologien (Kammleitungsfilter) zusätzliche, in ihrer Wirkung neuartige oder verbesserte schaltungstechnische Möglichkeiten, die unter Nutzung z. B. des Sperrbereichsverhaltens, der Frequenzabstimmbarkeit, der sehr geringen Einfügedämpfung und der hohen Leistungsbelastbarkeit (in Koaxialtechnik), erzielbar sind. Beispielsweise ist die Eigenschaft der Leistungsaddition von entsprechend großer Bedeutung, da hier z. B. die Möglichkeit des Aufschaltens mehrerer z. B. Schaltleistungsverstärker nach dem Klasse-D oder Klasse-S Prinzip an ein Bandpass-Filter gegeben ist, so dass am Filterausgang eine gewünschte Gesamtleistung erzielt werden kann, die z. B. von einem einzelnen Verstärker nicht bereitgestellt werden könnte.Furthermore arise in conjunction with other special properties selected filter topologies (Comb filter) additional, in their effect novel or improved circuitry Options, the z. B. the Sperrbereichsverhaltens, the frequency tunability, the very low insertion loss and the high power handling capacity (in coaxial technology), achievable are. For example, the property of power addition of correspondingly large Meaning, since here z. B. the possibility of switching several z. B. switching power amplifier after given the class D or class S principle to a bandpass filter is, so that at the filter output achieves a desired overall performance can be, the z. B. not be provided by a single amplifier could.
Zur Leistungsanpassung lassen sich mit dem erfindungsgemäßen Bandpass-Filter außerdem bestimmte Anschlussimpedanzen der Signalaus- bzw. -eingänge ohne zusätzliche Baugruppen/Bauelemente in großen Grenzen realisieren.to Power adaptation can be achieved with the bandpass filter according to the invention also certain Connection impedances of the signal outputs or inputs without additional Assemblies / components in large Realize limits.
- 11
- Koaxiale Koppelstäbe mit koaxialen Signaleingängencoaxial coupling rods with coaxial signal inputs
- 1*1*
- Koaxialer Koppelstab mit symmetrischem Signaleingangcoaxial Coupling bar with symmetrical signal input
- 22
- Koaxiale Resonatorencoaxial resonators
- 33
- Koaxialer Koppelstab mit koaxialem Signalausgangcoaxial Coupling bar with coaxial signal output
- 44
- Filtergehäusefilter housing
- 55
- koaxiale Kondensatoren zur Feinabstimmung der Filtermittenfrequenzcoaxial Capacitors for fine-tuning the filter center frequency
LiteraturlisteBibliography
-
[1] –
Ji-Fuh Liang; Blair, W. D.: High-Q TE01 mode DR filters for PCS wireless base stations; Microwave Theory and Techniques, IEEE Transactions an Volume 46, Issue 12, Part 2, Dec. 1998 Page(s): 2493–2500; Digital Object Identifier 10.1109/22.739239 Ji-Fuh Liang; Blair, WD: High-Q TE01 mode DR filters for PCS wireless base stations; Microwave Theory and Techniques, IEEE Transactions on Volume 46, Issue 12, Part 2, Dec. 1998 Page (s): 2493-2500; Digital Object Identifier 10.1109 / 22.739239 -
[2] –
Mansour, R. R.: Filter technologies for wireless base stations; Microwave Magazine, IEEE Volume 5, Issue 1, Mar 2004 Page(s): 68–74; Digital Object Identifier 10.1109/MMW.2004.1284945 Mansour, RR: Filter technologies for wireless base stations; Microwave Magazine, IEEE Volume 5, Issue 1, Mar 2004 Page (s): 68-74; Digital Object Identifier 10.1109 / MMW.2004.1284945 -
[3] –
Matthaei, G.; Young, L.; Jones, E., M., T.: Microwave Filters, Impedance-Matching Networks, and Coupling Structures, Artech House, Inc. 1980 Matthaei, G .; Young, L .; Jones, E., M., T .: Microwave Filters, Impedance-Matching Networks, and Coupling Structures, Artech House, Inc. 1980 -
[4] –
Nishikawa, T.; Wakino, K.; Tsunoda, K.; Ishikawa, Y.: Dielectric High-Power Bandpass Filter Using Quarter-Cut TE/018/Image Resonator for Cellular Base Stations; Microwave Theory and Techniques, IEEE Transactions an Volume 35, Issue 12, Dec 1987 Page(s): 1150–1155 Nishikawa, T .; Wakino, K .; Tsunoda, K .; Ishikawa, Y .: Dielectric High-Power Bandpass Filter Using Quarter-Cut TE / 018 / Image Resonator for Cellular Base Stations; Microwave Theory and Techniques, IEEE Transactions on Volume 35, Issue 12, Dec 1987 Page (s): 1150-1155 -
[5] –
Pance, K.: Base Station Filters without Irises; Microwave Symposium Digest, 2006. IEEE MTT-S International, June 2006, Page(s): 238–241; Digital Object Identifier 10.1109/MWSYM.2006.249476 Pance, K .: Base Station Filters without irises; Microwave Symposium Digest, 2006. IEEE MTT-S International, June 2006, Page (s): 238-241; Digital Object Identifier 10.1109 / MWSYM.2006.249476 -
[6] –
Min Cheol Park; Byoung Hwa Lee; Dong Seok Park: A laminated balance filter using LTCC technology Microwave Conference Proceedings, 2005. APMC 2005. Asia-Pacific Conference Proceedings, Volume 5, 4–7 Dec. 2005, Page(s): 4 pp.; Digital Object Identifier 10.1109/APMC.2005.1606973 Min Cheol Park; Byoung Hwa Lee; Dong Seok Park: A balanced balance filter using the LTCC technology Microwave Conference Proceedings, 2005. APMC 2005. Asia-Pacific Conference Proceedings, Volume 5, 4-7 Dec. 2005, Page (s): 4 pp .; Digital Object Identifier 10.1109 / APMC.2005.1606973 -
[7] –
Chung-Hwa Wu; Chi-Hsueh Wang; Chun Hsiung Chen: Balanced Coupled-Resonator Bandpass Filters Using Multisection Resonators for Common-Mode Suppression and Stopband Extension Microwave Theory and Techniques, IEEE Transactions on Volume 55, Issue 8, Aug. 2007 Page(s): 1756–1763; Digital Object Identifier 10.1109/TMTT.2007.901609 Chung-Hwa Wu; Chi-Hsueh Wang; Chun Hsiung Chen: Balanced Coupled Resonator Bandpass Filters Using Multisection Resonators for Common Mode Suppression and Stopband Extension Microwave Theory and Techniques, IEEE Transactions on Volume 55, Issue 8, Aug. 2007 Page (s): 1756-1763; Digital Object Identifier 10.1109 / TMTT.2007.901609 -
[8] – Ichikawa
Junichi et al.: Laminated dielectric filter,
JP2006067224 JP2006067224
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200810053013 DE102008053013A1 (en) | 2008-10-20 | 2008-10-20 | Band pass filter i.e. comb line filter, has set of electromagnetically coupled coaxial resonators, and conductive elements coupled at first resonator after input of filter and/or at last resonator before output of filter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200810053013 DE102008053013A1 (en) | 2008-10-20 | 2008-10-20 | Band pass filter i.e. comb line filter, has set of electromagnetically coupled coaxial resonators, and conductive elements coupled at first resonator after input of filter and/or at last resonator before output of filter |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102008053013A1 true DE102008053013A1 (en) | 2010-04-22 |
Family
ID=42035086
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200810053013 Ceased DE102008053013A1 (en) | 2008-10-20 | 2008-10-20 | Band pass filter i.e. comb line filter, has set of electromagnetically coupled coaxial resonators, and conductive elements coupled at first resonator after input of filter and/or at last resonator before output of filter |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102008053013A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0542917B1 (en) * | 1990-08-06 | 1998-02-25 | Motorola Inc. | Split ring resonator bandpass filter with differential output |
EP0926759A1 (en) * | 1997-12-25 | 1999-06-30 | Murata Manufacturing Co., Ltd. | Dielectric filter and dielectric duplexer |
JP2006067224A (en) | 2004-08-26 | 2006-03-09 | Ngk Spark Plug Co Ltd | Laminated dielectric filter |
-
2008
- 2008-10-20 DE DE200810053013 patent/DE102008053013A1/en not_active Ceased
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0542917B1 (en) * | 1990-08-06 | 1998-02-25 | Motorola Inc. | Split ring resonator bandpass filter with differential output |
EP0926759A1 (en) * | 1997-12-25 | 1999-06-30 | Murata Manufacturing Co., Ltd. | Dielectric filter and dielectric duplexer |
JP2006067224A (en) | 2004-08-26 | 2006-03-09 | Ngk Spark Plug Co Ltd | Laminated dielectric filter |
Non-Patent Citations (16)
Title |
---|
Chung-Hwa Wu, Chi-Hsueh Wang, Chun Hsiung Chen: Balanced Coupled-Resonator Bandpass Filters Using Multisection Resonators for Common-Mode Suppression and Stopband Extension Microwave Theory and Techniques, IEEE Transactions on Volume 55, Issue 8, Aug. 2007 Page(s):1756-1763 * |
Chung-Hwa Wu; Chi-Hsueh Wang; Chun Hsiung Chen: Balanced Coupled-Resonator Bandpass Filters Using Multisection Resonators for Common-Mode Suppression and Stopband Extension Microwave Theory and Techniques, IEEE Transactions on Volume 55, Issue 8, Aug. 2007 Page(s): 1756-1763; Digital Object Identifier 10.1109/TMTT.2007.901609 |
Ichikawa Junichi et al.: Laminated dielectric filter, JP 2006067224, 2006 * |
Ji-Fuh Liang, Blair, W.D.: High-Q TE01 mode DR filters for PCS wireless base stations. Microwave Theory and Techniques, IEEE Transactions on Volume 46, Issue 12, Part 2, Dec. 1998 page(s):2493-2500 * |
Ji-Fuh Liang, Blair, W.D.: High-Q TE01 mode DR filters for PCS wireless base stations. Microwave Theory and Techniques, IEEE Transactions on Volume 46, Issue 12, Part 2, Dec. 1998 page(s):2493-2500 Mansour, R.R.: Filter technologies for wireless base stations, Microwave Magazine, IEEE Volume 5, Issue I, Mar 2004 Page(s):68-74 Matthaei, G., Young, L., Jones, E.,M.,T.: Microwave Filters, Impedance-Matching Networks, and Coupling Structures, Artech House, Inc. 1980 Nishikawa T.j Wakino, K., Tsunoda, K.j Ishikawa, Y.: Dielectric High-Power Bandpass Filter Using Quarter-Cut TE/018/Image Resonator for Cellular Base Stations Microwave Theory and Techniques, IEEE Transactions on Volume 35, Issue 12, Dec 1987 page(s):1150-1155 Pance, K.: Base Station Filters without Irises, Microwave Symposium Digest, 2006. IEEE MTT-S International, June 2006, Page(s):238-241 Min Cheol Park, Byoung Hwa Lee, Dong Seok Park: A laminated balance filter using LTCC technology Microwave Conference Proceedings, 2005. |
Ji-Fuh Liang; Blair, W. D.: High-Q TE01 mode DR filters for PCS wireless base stations; Microwave Theory and Techniques, IEEE Transactions an Volume 46, Issue 12, Part 2, Dec. 1998 Page(s): 2493-2500; Digital Object Identifier 10.1109/22.739239 |
Mansour, R. R.: Filter technologies for wireless base stations; Microwave Magazine, IEEE Volume 5, Issue 1, Mar 2004 Page(s): 68-74; Digital Object Identifier 10.1109/MMW.2004.1284945 |
Mansour, R.R.: Filter technologies for wireless base stations, Microwave Magazine, IEEE Volume 5, Issue I, Mar 2004 Page(s):68-74 * |
Matthaei, G., Young, L., Jones, E.,M.,T.: Microwave Filters, Impedance-Matching Networks, and Coupling Structures, Artech House, Inc. 1980 * |
Matthaei, G.; Young, L.; Jones, E., M., T.: Microwave Filters, Impedance-Matching Networks, and Coupling Structures, Artech House, Inc. 1980 |
Min Cheol Park, Byoung Hwa Lee, Dong Seok Park: A laminated balance filter using LTCC technology Microwave Conference Proceedings, 2005. APMC 2005. Asia-Pacific Conference Proceedings, Volume 5, 4-7 Dec. 2005, Page(s):4 pp. * |
Min Cheol Park; Byoung Hwa Lee; Dong Seok Park: A laminated balance filter using LTCC technology Microwave Conference Proceedings, 2005. APMC 2005. Asia-Pacific Conference Proceedings, Volume 5, 4-7 Dec. 2005, Page(s): 4 pp.; Digital Object Identifier 10.1109/APMC.2005.1606973 |
Nishikawa T.j Wakino, K., Tsunoda, K.j Ishikawa, Y.: Dielectric High-Power Bandpass Filter Using Quarter-Cut TE/018/Image Resonator for Cellular Base Stations Microwave Theory and Techniques, IEEE Transactions on Volume 35, Issue 12, Dec 1987 page(s):1150-1155 * |
Nishikawa, T.; Wakino, K.; Tsunoda, K.; Ishikawa, Y.: Dielectric High-Power Bandpass Filter Using Quarter-Cut TE/018/Image Resonator for Cellular Base Stations; Microwave Theory and Techniques, IEEE Transactions an Volume 35, Issue 12, Dec 1987 Page(s): 1150-1155 |
Pance, K.: Base Station Filters without Irises, Microwave Symposium Digest, 2006. IEEE MTT-S International, June 2006, Page(s):238-241 * |
Pance, K.: Base Station Filters without Irises; Microwave Symposium Digest, 2006. IEEE MTT-S International, June 2006, Page(s): 238-241; Digital Object Identifier 10.1109/MWSYM.2006.249476 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE69031881T2 (en) | Bandpass filter with several stages connected in parallel | |
DE102008020597B4 (en) | circuitry | |
EP0255068B1 (en) | Filter for short electromagnetic waves having the shape of comb filters or interdigital filters | |
EP3565126A1 (en) | Circuit with reduced insertion loss and component comprising the circuit | |
EP3317915B1 (en) | Power combiner for coupling high-frequency signals and power combiner arrangement comprising a power combiner of this type | |
WO2015124368A1 (en) | Tunable duplexer having a circulator | |
DE19652799C2 (en) | Microwave filter | |
CN109066039A (en) | A kind of novel micro-strip function divides duplexer | |
CN109273807A (en) | A kind of novel four function filter-divider of high performance wideband | |
EP1388206B1 (en) | Filter arrangement for symmetrical and asymmetrical line systems | |
DE68917373T2 (en) | Magnetically tunable bandpass filter. | |
Dainkeh et al. | Filtered power splitter using microstrip square open loop resonators | |
CN105720345A (en) | High-selectivity cross-shaped wideband coupler | |
CN109326855A (en) | A kind of novel four function filter-divider of broadband | |
DE3028925A1 (en) | Quarter wave branch connector for HF aerials - has junction with coupling loops at input resonators of twin parallel filters | |
DE102008053013A1 (en) | Band pass filter i.e. comb line filter, has set of electromagnetically coupled coaxial resonators, and conductive elements coupled at first resonator after input of filter and/or at last resonator before output of filter | |
Yang et al. | Compact and high-performance low-temperature co-fired ceramic balun filter using the hybrid resonator and symmetric four-port network | |
CN104393382A (en) | High order miniature narrowband bandpass filter with wide stopband character | |
CN116130910A (en) | Electromagnetic band gap filtering power divider | |
Shaman | Design of a compact C-band microstrip bandpass filter for satellite communications applications | |
CN102637931A (en) | Microwave three-passband bandpass filter | |
DE202021101940U1 (en) | Radio frequency module and communication device | |
DE10303653A1 (en) | Dielectric resonator and dielectric filter | |
DE1942909A1 (en) | Filter for very short electromagnetic waves | |
Nosrati et al. | A compact composite broad stop-band elliptic-function low-pass filter for ultra wide-band applications using interdigital capacitors |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
R016 | Response to examination communication | ||
R002 | Refusal decision in examination/registration proceedings | ||
R003 | Refusal decision now final |