EP0015610A1 - Spiegelfrequenzreflektierendes Mikrowellenfilter und Mikrowellenempfänger mit einem solchen Filter - Google Patents

Spiegelfrequenzreflektierendes Mikrowellenfilter und Mikrowellenempfänger mit einem solchen Filter Download PDF

Info

Publication number
EP0015610A1
EP0015610A1 EP80200158A EP80200158A EP0015610A1 EP 0015610 A1 EP0015610 A1 EP 0015610A1 EP 80200158 A EP80200158 A EP 80200158A EP 80200158 A EP80200158 A EP 80200158A EP 0015610 A1 EP0015610 A1 EP 0015610A1
Authority
EP
European Patent Office
Prior art keywords
frequency
filter
signal
transmission line
quarter
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
EP80200158A
Other languages
English (en)
French (fr)
Other versions
EP0015610B1 (de
Inventor
François de Ronde
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Laboratoires dElectronique Philips SAS
Koninklijke Philips NV
Original Assignee
Laboratoires dElectronique et de Physique Appliquee
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics NV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Laboratoires dElectronique et de Physique Appliquee, Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Laboratoires dElectronique et de Physique Appliquee
Publication of EP0015610A1 publication Critical patent/EP0015610A1/de
Application granted granted Critical
Publication of EP0015610B1 publication Critical patent/EP0015610B1/de
Expired legal-status Critical Current

Links

Images

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
    • H01P1/203—Strip line filters
    • H01P1/2039—Galvanic coupling between Input/Output
    • 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

Definitions

  • the present invention relates to an image frequency reflection filter for a transmission line with non-localized constants produced in a so-called planar structure and for example according to the microstrip technique (commonly called microstrip).
  • This filter can be used in particular in a microwave receiver for television signals comprising a mixer which receives on the one hand a reception signal of frequency f S and on the other hand a signal of frequency f OL delivered by a local oscillator, and which itself provides a signal at an intermediate frequency f FI equal to the difference of the frequencies f S and f OL .
  • the filter according to the invention is intended to prevent the transmission of the spurious signal of frequency f p called image frequency and equal to (2f OL - f s ) which is returned from the mixer to the input of the microwave receiver.
  • the combination of the signals of frequency f S and f OL can give rise to the appearance of a whole series of other second-order products which are as many spurious signals, but whose the frequency is more distant than f p from the useful frequency band including f S and f OL and the filtering of which therefore does not have to be considered here.
  • the object of the invention is to provide an original filter structure whose performance is significantly improved compared to existing filters, while remaining compact and therefore usable in many applications where a small footprint is an essential quality.
  • the invention relates for this purpose to an image frequency reflection filter for transmission line with non-localized constants produced in a so-called planar structure and for example according to the microstrip technique, this reflection filter being usable in particular in a microwave receiver which comprises a mixer which, on the one hand, receives a reception signal of frequency f S and, on the other hand, a signal of frequency f OL delivered by a local oscillator to supply after mixing a signal at an intermediate frequency f FI equal to the difference in frequencies f S and f OL , this reflection filter being intended to prevent, by using a quarter-wave filter of length equal to a quarter of the wavelength, in the transmission line of the signal of frequency f p said image frequency and equal to (2 f OL - f S ) ' the transmission of this parasitic signal returned from the mixer to the input of the microwave receiver, this reflection filter being characterized in that it comprises an association of elements passive with non-localized constants placed substantially at the same point in the path of this parasitic signal and intended to allow
  • the elements constituting this association are judiciously chosen so that their respective contributions, while being specific, combine their effects without reducing the action of the other element (s); moreover, the location of these elements is such that their distance from the mixer makes it possible to obtain at the latter an optimal impedance for the frequency f, the impedance being considered to be optimal when the noise is the lowest.
  • the association according to the invention comprises the quarter wave filter, which makes it possible to obtain a very good reflection in a frequency band centered on f p and of width determined by the choice of that of this quarter wave filter, the adaptation circuit, which ensures optimal transmission at least of the signal of frequency f s , and the transverse recess, an additional element intended to allow in the quarter-wave filter the resonance of the odd mode.
  • This last element contributes to reducing the width of the frequency band between the reflection band and the transmission band by lowering the upper limit of this transition frequency band, and therefore both improve the adaptation of the reflection filter according to the invention for the reception frequency f S and to ensure good adaptation also for the local frequency f OL .
  • This last characteristic concerning f OL allows, as already mentioned, to reduce the power of the local oscillator without harming the quality of the microwave receiver in which it is inserted.
  • the image frequency reflection filter comprises, as we have seen, a combination of passive elements with non-localized constants, intended to allow, by a respective action of each of these elements on a different part of the band frequency including at least the frequencies f S , f OL and f, obtaining the desired filter curve.
  • This association comprises, in fact, at least one quarter-wave filter, such as those of FIGS. 1a and 1b, an odd-mode resonator, conforming to one of the arrangements shown in FIGS. 2a to 2c, and a circuit d adaptation, such as those of Figures 3a to 3e.
  • the quarter-wave filter of FIG. 1a consists of a rectangular conductive tape 2, perpendicular to the microstrip transmission line 1 to which it is connected.
  • the width of the ribbon 2 is, in the example described here, equal to twice that of line 1, the width of the reflected frequency band increasing with that of this ribbon, and its length is equal to a quarter of the length d wave associated with frequency f p in line 1.
  • the quarter-wave filter consists of a circular conducting surface 3 connecting to the microstrip line 1 over a width equal to that of the strip 2 in the case of FIG. the diameter of this surface 3 is also equal to a quarter of the wavelength associated with the frequency f p in the line 1.
  • FIGS. 2a and 2b respectively show the quarter-wave filters of FIGS. 1a and 1b, but this time equipped with an odd-mode resonator, in the form of a transverse recess 4 which subdivides the ribbon 2 or the surface 3 into two zones 5 and 6 excited by this odd mode.
  • the wider recess 4 is occupied by an insulated conductive surface 7 intended to allow adjustment of the resonant frequency and the overvoltage of the resonator, in order to make the slope of the filtering curve steeper. between f p and f OL and therefore reduce the width of the frequency band corresponding to this area of the curve.
  • the adaptation circuit of FIG. 3a consists of a small rectangular conductive tape 10, perpendicular to the line 1 and comparable to a capacitive element correcting the inductive effects of a quarter wave filter such as those of FIGS. with respect to the frequency signal f S.
  • this ribbon 10 widens, immediately after the zone of connection to the line 1, respectively in a second conductive ribbon 11 or in a semicircular conductive surface 12, the association of the two elements being, in either case, intended to constitute a series LC circuit.
  • FIG. 3a consists of a small rectangular conductive tape 10, perpendicular to the line 1 and comparable to a capacitive element correcting the inductive effects of a quarter wave filter such as those of FIGS. with respect to the frequency signal f S.
  • this ribbon 10 widens, immediately after the zone of connection to the line 1, respectively in a second conductive ribbon 11 or in a semicircular conductive surface 12, the association of the two elements being, in either case, intended to constitute a series LC circuit.
  • the adaptation circuit comprises two small rectangular conducting strips 15 and 16, perpendicular to the line 1, located at a distance from each other equal to the eighth of the length of wave associated with the frequency f S to be transmitted, and similar to two capacitors in parallel.
  • the adaptation circuit comprises a conductive surface 18 rectangular, of length equal to three eighths of the wavelength associated with the frequency f to be transmitted and connected over its entire length to line 1; this surface 18 combines two discontinuities and is comparable to a zone of lower impedance for this frequency f S.
  • Signals at frequency f S received by an antenna (not shown) are sent to a mixer 30 which also receives, via a directional filter 31, a signal at frequency f OL delivered by a local oscillator 32, and which delivers a signal at the intermediate frequency f FI .
  • the filter 33 according to the invention is placed, as shown in FIG. 6, on the connection which precedes the entry of the mixer 30 and at a distance from it such that, for the image frequency f p to be reflected, the impedance seen by the mixer is optimal.
  • the present invention is not limited to the exemplary embodiments which have just been described and shown, from which other modes and other embodiments can be provided, without thereby departing from the scope according to the invention. 'invention.
  • the application of the invention has been described above in the case of the microstrip structure, but a filter according to the invention can also be used in the case of a suspended microstrip structure.
  • the combination of elements shown in FIG. 4 is only an example, each of the elements being able to be replaced by an element recognized as being substantially equivalent.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Noise Elimination (AREA)
EP80200158A 1979-03-06 1980-02-26 Spiegelfrequenzreflektierendes Mikrowellenfilter und Mikrowellenempfänger mit einem solchen Filter Expired EP0015610B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7905735A FR2451110A1 (fr) 1979-03-06 1979-03-06 Filtre de reflexion de frequence image en hyperfrequence
FR7905735 1979-03-06

Publications (2)

Publication Number Publication Date
EP0015610A1 true EP0015610A1 (de) 1980-09-17
EP0015610B1 EP0015610B1 (de) 1984-09-26

Family

ID=9222808

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80200158A Expired EP0015610B1 (de) 1979-03-06 1980-02-26 Spiegelfrequenzreflektierendes Mikrowellenfilter und Mikrowellenempfänger mit einem solchen Filter

Country Status (5)

Country Link
US (1) US4313097A (de)
EP (1) EP0015610B1 (de)
JP (1) JPS55121702A (de)
DE (1) DE3069254D1 (de)
FR (1) FR2451110A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0021523A1 (de) * 1979-06-25 1981-01-07 Laboratoires D'electronique Et De Physique Appliquee L.E.P. Bandsperrfilter für eine Mikrowellenübertragungsleitung und Polarisationsschaltung eines Mikrowellentransistors mit diesem Filter

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4371853A (en) * 1979-10-30 1983-02-01 Matsushita Electric Industrial Company, Limited Strip-line resonator and a band pass filter having the same
JPS59125102A (ja) * 1982-12-29 1984-07-19 Matsushita Electric Ind Co Ltd 高周波用電波フイルタ装置
DE3304862A1 (de) * 1983-02-12 1984-08-16 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Hf-filter
US4873501A (en) * 1986-06-27 1989-10-10 The United States Of America As Represented By The Secretary Of The Navy Internal transmission line filter element
JPH0385903A (ja) * 1989-08-30 1991-04-11 Kyocera Corp 帯域通過フィルタ
US5734307A (en) * 1996-04-04 1998-03-31 Ericsson Inc. Distributed device for differential circuit
US6792299B2 (en) * 2001-03-21 2004-09-14 Conductus, Inc. Device approximating a shunt capacitor for strip-line-type circuits
US7558608B2 (en) * 2004-09-29 2009-07-07 Fujitsu Limited Superconducting device, fabrication method thereof, and filter adjusting method
WO2009145276A1 (ja) * 2008-05-28 2009-12-03 京セラ株式会社 バンドパスフィルタならびにそれを用いた無線通信モジュールおよび無線通信機器

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2118309A1 (de) * 1971-04-15 1972-10-19 Siemens Ag Verfahren zum Erniedrigen der Resonanzfrequenz von Microstrip-Resonatoren
FR2261655A2 (en) * 1973-02-20 1975-09-12 Minet Roger Microwave line band filter - with central conductor inserted between two dielectric sheets

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3688225A (en) * 1969-05-21 1972-08-29 Us Army Slot-line
US3678433A (en) * 1970-07-24 1972-07-18 Collins Radio Co Rf rejection filter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2118309A1 (de) * 1971-04-15 1972-10-19 Siemens Ag Verfahren zum Erniedrigen der Resonanzfrequenz von Microstrip-Resonatoren
FR2261655A2 (en) * 1973-02-20 1975-09-12 Minet Roger Microwave line band filter - with central conductor inserted between two dielectric sheets

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
IBM TECHNICAL DISCLOSURE BULLETIN, Vol. 18, No. 6, Novembre 1975, pages 1810-1811 New York, U.S.A. P.L. CLOUSER: "Microstrip Filter" * En entier * *
IEEE INTERNATIONAL ELECTRON DEVICES MEETING, 6-8 Decembre 1976, pages 87-89 Washington, U.S.A. E.J. DENLINGER et al.: "High Performance Mixer Diode" * Page 88, colonne de gauche; figure 2 * *
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, Vol. MTT-23 No. 3, Mars 1975, pages 276-281 New York, U.S.A. L.E. DICKENS et al.: "An Integrated-Circuit Balanced Mixer, Image and Sum Enhanced" * Paragraphe I. Intriduction et IV. Results, alinea 1; figure 8 * *
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, Vol. MTT-23 No. 4, Avril 1975, pages 375-376 New York, U.S.A. J.E. DEGENFORD et al.: "Analysis and Design of a Low-Noise X-Band MIC Mixer 1-GHz IF Amplifier" * En entier * *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0021523A1 (de) * 1979-06-25 1981-01-07 Laboratoires D'electronique Et De Physique Appliquee L.E.P. Bandsperrfilter für eine Mikrowellenübertragungsleitung und Polarisationsschaltung eines Mikrowellentransistors mit diesem Filter

Also Published As

Publication number Publication date
FR2451110A1 (fr) 1980-10-03
US4313097A (en) 1982-01-26
DE3069254D1 (en) 1984-10-31
FR2451110B1 (de) 1984-05-11
JPS55121702A (en) 1980-09-19
JPS6340361B2 (de) 1988-08-10
EP0015610B1 (de) 1984-09-26

Similar Documents

Publication Publication Date Title
EP1863116B1 (de) Breitbandrichtkoppler
EP2299790B1 (de) Verbindungsanordnung für Hochfrequenzsignale zwischen einem Verbindungsstecker und einer Übertragungsbahn
FR2860927A1 (fr) Antenne interne de faible volume
EP1427053A1 (de) Richtkoppler
FR2778272A1 (fr) Dispositif de radiocommunication et antenne bifrequence realisee selon la technique des microrubans
EP0201409A1 (de) Breitbandiger Richtungskoppler für einen Mikrostreifenleiter
FR2938378A1 (fr) Ligne a retard bi-ruban differentielle coplanaires, filtre differentiel d'ordre superieur et antenne filtrante munis d'une telle ligne
EP0015610A1 (de) Spiegelfrequenzreflektierendes Mikrowellenfilter und Mikrowellenempfänger mit einem solchen Filter
EP3136499A1 (de) Aufteilungs-/kombinationssystem für hyperfrequenzwelle
FR2850792A1 (fr) Filtre compact en guide d'onde
FR2850793A1 (fr) Transition entre un circuit micro-ruban et un guide d'onde et unite exterieure d'emission reception incorporant la transition
FR3008238A1 (fr) Filtre rejecteur de bande
EP0089083A1 (de) Breitbandleistungsteiler/-addierer für HF Höchstfrequenz-Schaltungen und Impedanztransformator ausgeführt mit diesem Teiler/Addierer
EP0153541B1 (de) Rundes Fernster für einen Mikrowellenhohlleiter
EP0031275B1 (de) Mikrowellenfenster und Wellenleiter mit einem solchen Fenster
EP0281773A1 (de) Abstimmbares Mikrowellenfilter
EP0430136A1 (de) Bandsperrfilter für Mikrowellenhohlleiter
EP2147478B1 (de) Hyperfrequenzsignalkoppler mit mikrostreifentechnologie
FR2871618A1 (fr) Filtre basse-bande hyperfrequence de type finline
EP3605734B1 (de) Antennevorrichtung umfassend mindestens zwei antennen und electrische verbindung auf gleichem substrat
EP0625823A1 (de) Hyperfrequenz-Halbleiteranordnung mit Stabilisierungsmitteln
FR2784236A1 (fr) Antenne a commutation en frequence
EP3721501A1 (de) Mikrowellen-bauelement und zugehöriges herstellungsverfahren
EP0296929A1 (de) Symmetrische Mikrowellenübertragungsleitung mit zwei koplanären Leitern
FR2633118A1 (fr) Filtre passe-bande a resonateurs dielectriques

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 19801107

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: N.V. PHILIPS' GLOEILAMPENFABRIEKEN

Owner name: LABORATOIRES D'ELECTRONIQUE ET DE PHYSIQUE APPLIQU

ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE FR GB IT

REF Corresponds to:

Ref document number: 3069254

Country of ref document: DE

Date of ref document: 19841031

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19900131

Year of fee payment: 11

ITTA It: last paid annual fee
REG Reference to a national code

Ref country code: FR

Ref legal event code: CD

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19900424

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19910226

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19911101

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19930219

Year of fee payment: 14

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19941031

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST