EP0108003A1 - Doppelstreifen-Resonator und nach dieser Art gestaltetes Filter - Google Patents

Doppelstreifen-Resonator und nach dieser Art gestaltetes Filter Download PDF

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Publication number
EP0108003A1
EP0108003A1 EP83402026A EP83402026A EP0108003A1 EP 0108003 A1 EP0108003 A1 EP 0108003A1 EP 83402026 A EP83402026 A EP 83402026A EP 83402026 A EP83402026 A EP 83402026A EP 0108003 A1 EP0108003 A1 EP 0108003A1
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EP
European Patent Office
Prior art keywords
resonators
resonator
filter
dielectric
faces
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
Application number
EP83402026A
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English (en)
French (fr)
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EP0108003B1 (de
Inventor
Jean-Claude Mage
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Thales SA
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Thomson CSF SA
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Application filed by Thomson CSF SA filed Critical Thomson CSF SA
Publication of EP0108003A1 publication Critical patent/EP0108003A1/de
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    • 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
    • H01P1/203—Strip line filters
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00—Resonators of the waveguide type
    • H01P7/08—Strip line resonators
    • H01P7/082—Microstripline resonators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00—Resonators of the waveguide type
    • H01P7/08—Strip line resonators
    • H01P7/084—Triplate line resonators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00—Resonators of the waveguide type
    • H01P7/10—Dielectric resonators

Definitions

  • the present invention relates to a type of electromagnetic resonator, which can be called a "two-band resonator", as well as the high frequency filters produced from these resonators.
  • the resonators and filters produced from these elements often consist of line sections.
  • These can be air coaxial lines or coaxial lines loaded with dielectric as mentioned in the article: "Bandpass filter with dielectric materials used for broadcasting channel filter” by K. WAKINO and Y. KONISHI published in the review I.E.E.E. Transactions on Broadcasting, vol. BC-26, N ° 1, March 1980. It is also known to manufacture resonators and filters from microstrip lines as the article indicates: "750 MHz microstrip bandpass filter on barium tetratitanate substrate" by G. OHM and G. SCHMOLLER published in the review Electronics Letters, vol. 18, No. 15 of July 22, 1982.
  • the coaxial line technique allows the manufacture of independent resonators whose natural frequencies can be adjusted before their assembly to form filters.
  • This assembly can be carried out in the case of a bandpass filter by placing the various resonators end to end, the couplings between two sections of consecutive lines being determined by the distances which separate their faces placed opposite.
  • overvoltage coefficients greater than 500
  • a silver-plated 20 mm diameter resonator can have an overvoltage coefficient Q greater than 1000 for a frequency of 1 GHz.
  • the coupling of quarter-wave resonators remains delicate and the very realization of the coaxial structure is quite complex because of the different operations of machining and metallization of elements with circular section.
  • Resonators can be designed using the microstrip line technique. They are generally produced from a relatively large dielectric substrate, one face of which is entirely metallized and of which the other receives a metallic conductor in the form of a thin ribbon. This technique has two drawbacks. On the one hand, the inherent overvoltage coefficients Q of the resonators are always low (less than 500) and consequently the performance of filters formed from these resonators is always modest (high insertion losses, greater than 3 dB towards 1 GHz). On the other hand, once the filter has been produced, by depositing ribbons on the same substrate, it is practically impossible to adjust the natural frequencies of the resonators as well as their mutual couplings. This prohibits the industrial production of filters comprising a high number of poles due to the inevitable dispersions of the characteristics: in particular, the dielectric constant of the substrate.
  • the invention proposes to produce resonators from a parallelepiped made of dielectric material.
  • a line is produced by metallizing two opposite faces of the parallelepiped and a resonator or along the length and termination of the line.
  • the subject of the invention is therefore a resonator comprising a section of line with distributed constants along which a steady state of transverse electromagnetic waves is established, said section comprising two conductive elements separated by a dielectric medium; characterized in that said medium is formed by a dielectric solid with six faces, at most four of said faces being entirely covered by a metallization and two other non-covered faces being opposite to each other.
  • the invention also relates to a high-frequency filter comprising at least one resonator according to the invention.
  • FIG. 1 shows a waveguide called microstrip line (microstrip line in English).
  • This line is formed by a flat dielectric substrate 1 covered on its underside with a metallization 2.
  • the opposite face of the substrate receives a conductive tape 3.
  • This solid can be a parallelepiped.
  • Metallizations 5 and 6 cover two opposite faces of the dielectric.
  • the bi-ribbon line has two similar electrodes.
  • a resonator is shown in Figure 4. It is formed by a bi-ribbon line defined by a dielectric bar 12, metallizations 13 and 14 and a short circuit 15 caused by the metallization of one of the ends of the bar. Its length L is equal to .
  • an appropriate dielectric In order to have temperature stable resonators, it is advantageous to choose an appropriate dielectric.
  • a material such as those which were the subject of the patent of the Applicant n ° 80.04 601 filed on February 29, 1980. These materials have relative molar proportions t Ti 0 2 , x Sn 0 2 , y Zr 0 2 , a Ni 0, b La 2 0 3 and c Fe where the parameters t, x, y, a, b and c satisfy the following inequalities:
  • resonators are typically intended for the production of band-pass and band-cut filters in the UHF range. They can also be used to stabilize oscillators. Examples of filters in the vicinity of 1 GHz are presented below. They can be easily transposed to other frequencies and can be made indifferently using resonators or .
  • Figure 5 is a top view of the housing from which the cover has been removed. A cut was made at the holes 25 and 26 for input and output of the signal. The hole 25 allows the passage of a conductor 27 which forms a coupling loop 29, serving as excitation means, with the resonator 20. The end of the conductor 27 is then connected to the housing.
  • the device allowing the output of the signal is similarly constituted by a conductor 28 which forms a loop 30, which serves as collecting means, at the level of the resonator 23 and the end of which is connected to ground.
  • the bottom of the housing is covered with an insulating substrate 31 which has, for example, a very low dielectric constant.
  • the resonators are fixed to the substrate 31, for example by gluing.
  • the metallizations of the quarter wave resonators are respectively mutually parallel and perpendicular to the substrate as shown in FIG. 5.
  • the coupling between resonators is made by mutual inductance.
  • the natural frequencies of each resonator have been previously adjusted either by manufacturing or by running in. The development of the filter is then greatly facilitated.
  • We can also separate the resonators by spacers made of dielectric material of low dielectric constant. The distances between each resonator can be of the order of edge a.
  • FIG. 6 is a sectional view of the filter shown in Figure 5, the section being taken along AA.
  • a metal cover 32 closes the housing and helps to shield the filter from external influences. It can be fixed to the housing by screws not shown. In order to make fine adjustments to the couplings between resonators, it is possible to place adjustment screws along axes 33, 34 and 35. These screws, located between the resonators, modify the electromagnetic field, depending on the state of their depression. reigns between the resonators.
  • FIG. 8 shows such a filter.
  • the housing was cut as in FIG. 5.
  • the housing 50 is recognized on which a cover, not shown, is fixed.
  • the bottom of the housing is covered with a substrate 51 of dielectric material of low dielectric constant.
  • the filter includes 3 quarter-wave resonators 52, 53 and 54, holes 55 and 56 which allow the passage of a signal input conductor 57 and an output conductor 58, a line 59 which can be l soul of a coaxial line.
  • the housing and its cover are connected to the ground.
  • the distances separating the resonators from each other and between the line 59 are of the order of magnitude of the edge a. It is also possible to obtain with this kind of filters an adjustment of the couplings by the presence of screws modifying the electromagnetic field between the resonators.
  • the band-cut and band-pass filters produced using quarter-wave resonators exhibit a first spurious response at a frequency substantially triple their operating frequency.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Waveguides (AREA)
EP83402026A 1982-10-29 1983-10-18 Doppelstreifen-Resonator und nach dieser Art gestaltetes Filter Expired EP0108003B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8218236 1982-10-29
FR8218236A FR2535547B1 (fr) 1982-10-29 1982-10-29 Resonateurs bi-rubans et filtres realises a partir de ces resonateurs

Publications (2)

Publication Number Publication Date
EP0108003A1 true EP0108003A1 (de) 1984-05-09
EP0108003B1 EP0108003B1 (de) 1988-05-11

Family

ID=9278766

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83402026A Expired EP0108003B1 (de) 1982-10-29 1983-10-18 Doppelstreifen-Resonator und nach dieser Art gestaltetes Filter

Country Status (5)

Country Link
US (1) US4603311A (de)
EP (1) EP0108003B1 (de)
JP (1) JPS59107603A (de)
DE (1) DE3376600D1 (de)
FR (1) FR2535547B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2565438A1 (fr) * 1984-05-30 1985-12-06 Cepe Filtre dielectrique a frequence centrale variable.
FR2568414A1 (fr) * 1984-05-25 1986-01-31 Thomson Csf Resonateurs electromagnetiques et filtres realises a partir de ces resonateurs.
EP0187579A1 (de) * 1984-12-06 1986-07-16 Thomson-Csf Elektromagnetische Resonatoren und Filter mit solchen Resonatoren
EP0547968A1 (de) * 1991-12-19 1993-06-23 Commissariat A L'energie Atomique Messsystem für dielektrische und magnetische Eigenschaften von Materialien
RU2784658C1 (ru) * 2022-04-11 2022-11-29 Федеральное государственное бюджетное научное учреждение "Федеральный исследовательский центр "Красноярский научный центр Сибирского отделения Российской академии наук" (ФИЦ КНЦ СО РАН, КНЦ СО РАН) Полосковый удвоитель частоты

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4751481A (en) * 1986-12-29 1988-06-14 Motorola, Inc. Molded resonator
US4908589A (en) * 1987-09-21 1990-03-13 Hughes Aircraft Company Dielectrically loaded waveguide switch
EP0519085B1 (de) * 1990-12-26 1996-10-16 TDK Corporation Hochfrequenzvorrichtung
FI88440C (fi) * 1991-06-25 1993-05-10 Lk Products Oy Keramiskt filter
US5290740A (en) * 1991-11-06 1994-03-01 Ngk Insulators, Ltd. Dielectric ceramic composition used for producing dielectric resonator or filter for microwave application
FI95515C (fi) * 1993-11-01 1996-02-12 Solitra Oy Keskitetyn piirivakion resonaattorirakenne ja menetelmä keskitetyn piirivakion resonaattorirakenteen säätämiseksi
US5691675A (en) * 1994-03-31 1997-11-25 Nihon Dengyo Kosaku Co., Ltd. Resonator with external conductor as resonance inductance element and multiple resonator filter
WO1999041799A1 (en) * 1998-02-17 1999-08-19 Itron, Inc. Laser tunable thick film microwave resonator for printed circuit boards
FR2847747B1 (fr) * 2002-11-22 2005-02-18 Thales Sa Convertisseur analogique/numerique pour hyperfrequences
CN104037484A (zh) * 2013-03-08 2014-09-10 中兴通讯股份有限公司 介质谐振器及介质滤波器
US10522889B2 (en) * 2018-04-09 2019-12-31 United States Of America As Represented By Secretary Of The Navy Tunable passive enhance Q microwave notch filter

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2838736A (en) * 1953-03-20 1958-06-10 Erie Resistor Corp High dielectric constant cavity resonator
US3327255A (en) * 1963-03-06 1967-06-20 Bolljahn Harriette Interdigital band-pass filters
DE2805965A1 (de) * 1977-02-14 1978-08-17 Murata Manufacturing Co Interdigital-bandpassfilter
FR2496995A1 (fr) * 1980-11-07 1982-06-25 Thomson Csf Filtre a elimination de bande accordable mecaniquement et circuit comportant un tel filtre

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2774046A (en) * 1952-05-08 1956-12-11 Itt Microwave transmission line
US2820206A (en) * 1952-05-08 1958-01-14 Itt Microwave filters
US3673509A (en) * 1970-08-07 1972-06-27 Robert B Cooper Jr Interdigital preamplifier

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2838736A (en) * 1953-03-20 1958-06-10 Erie Resistor Corp High dielectric constant cavity resonator
US3327255A (en) * 1963-03-06 1967-06-20 Bolljahn Harriette Interdigital band-pass filters
DE2805965A1 (de) * 1977-02-14 1978-08-17 Murata Manufacturing Co Interdigital-bandpassfilter
FR2496995A1 (fr) * 1980-11-07 1982-06-25 Thomson Csf Filtre a elimination de bande accordable mecaniquement et circuit comportant un tel filtre

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
ELECTRONICS LETTERS, vol. 18, no. 15, 22 juillet 1982, pages 661-663, Hitchin, GB. *
G.L. MATTHAEI et al.: "Microwave filters, impedance-matching networks and coupling structures", 1964, McGraw-Hill Book Company, pages 422-425,770, New York, USA *
IEEE TRANSACTIONS ON BROADCASTING, vol. BC-26, no. 1, mars 1980, pages 1-6, New York, USA *
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, vol. MTT-19, no. 7, juillet 1971, pages 643-652, New York, USA *
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, vol. MTT-21, no. 10, octobre 1973, pages 636-639, New York, USA *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2568414A1 (fr) * 1984-05-25 1986-01-31 Thomson Csf Resonateurs electromagnetiques et filtres realises a partir de ces resonateurs.
FR2565438A1 (fr) * 1984-05-30 1985-12-06 Cepe Filtre dielectrique a frequence centrale variable.
EP0165158A1 (de) * 1984-05-30 1985-12-18 Compagnie D'electronique Et De Piezo-Electricite - C.E.P.E. Dielektrischer Filter mit veränderbarer Mittenfrequenz
EP0187579A1 (de) * 1984-12-06 1986-07-16 Thomson-Csf Elektromagnetische Resonatoren und Filter mit solchen Resonatoren
EP0547968A1 (de) * 1991-12-19 1993-06-23 Commissariat A L'energie Atomique Messsystem für dielektrische und magnetische Eigenschaften von Materialien
FR2685490A1 (fr) * 1991-12-19 1993-06-25 Commissariat Energie Atomique Dispositif de mesure de parametres dielectriques et magnetiques de materiaux et systeme de mesure desdits parametres utilisant ce dispositif.
RU2784658C1 (ru) * 2022-04-11 2022-11-29 Федеральное государственное бюджетное научное учреждение "Федеральный исследовательский центр "Красноярский научный центр Сибирского отделения Российской академии наук" (ФИЦ КНЦ СО РАН, КНЦ СО РАН) Полосковый удвоитель частоты

Also Published As

Publication number Publication date
EP0108003B1 (de) 1988-05-11
DE3376600D1 (en) 1988-06-16
US4603311A (en) 1986-07-29
FR2535547B1 (fr) 1988-09-16
FR2535547A1 (fr) 1984-05-04
JPS59107603A (ja) 1984-06-21

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