EP0309850A2 - Dispositif d'élimination de modes électromagnétiques parasites dans des installations à guides d'ondes - Google Patents

Dispositif d'élimination de modes électromagnétiques parasites dans des installations à guides d'ondes Download PDF

Info

Publication number: EP0309850A2
Authority: EP; European Patent Office
Prior art keywords: waveguide; mode; mode filter; cross; arrangement according
Prior art date: 1987-09-28
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

EP88115332A

Other languages

German (de)

English (en)

Other versions

EP0309850A3 (en

EP0309850B1 (fr

Inventor

Wolfgang Dipl.-Ing. Löw

Uwe Dipl.-Ing. Leupelt

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.)

Siemens AG

Siemens Corp

Original Assignee

Siemens AG

Siemens Corp

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.)

1987-09-28

Filing date

1988-09-19

Publication date

1989-04-05

1988-09-19 Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG

1989-04-05 Publication of EP0309850A2 publication Critical patent/EP0309850A2/fr

1990-04-25 Publication of EP0309850A3 publication Critical patent/EP0309850A3/de

1993-08-11 Application granted granted Critical

1993-08-11 Publication of EP0309850B1 publication Critical patent/EP0309850B1/fr

2008-09-19 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

238000009434 installation Methods 0.000 title 1
230000001629 suppression Effects 0.000 title 1
239000006260 foam Substances 0.000 claims abstract description 5
238000013016 damping Methods 0.000 claims description 10
230000007704 transition Effects 0.000 claims description 8
230000005540 biological transmission Effects 0.000 claims description 6
239000002184 metal Substances 0.000 claims description 4
239000003822 epoxy resin Substances 0.000 claims description 2
239000003365 glass fiber Substances 0.000 claims description 2
229920000647 polyepoxide Polymers 0.000 claims description 2
239000000758 substrate Substances 0.000 claims description 2
230000008878 coupling Effects 0.000 description 2
238000010168 coupling process Methods 0.000 description 2
238000005859 coupling reaction Methods 0.000 description 2
239000012876 carrier material Substances 0.000 description 1
238000011161 development Methods 0.000 description 1
230000018109 developmental process Effects 0.000 description 1
239000006261 foam material Substances 0.000 description 1

Images

Classifications

- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/16—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion
- H01P1/162—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion absorbing spurious or unwanted modes of propagation

Definitions

the invention relates to an arrangement for eliminating disturbing electromagnetic waveforms in waveguide systems with waveguide sections of the same or different rectangular cross-section, in which a surface resistance forming a mode filter is arranged in the waveguide from a plate-shaped metal-coated dielectric carrier element which is located in the cross-sectional center in the plane of the broadside extends over a suitable length in the axial direction to the waveguide.
a surface resistance forming a mode filter is arranged in the waveguide from a plate-shaped metal-coated dielectric carrier element which is located in the cross-sectional center in the plane of the broadside extends over a suitable length in the axial direction to the waveguide.
One way to reduce attenuation in waveguides is to operate the line above its uniqueness limit.
DE 31 30 209 A1 describes a line for the transmission of electromagnetic energy in the microwave range with a waveguide of rectangular or elliptical cross-section, which operates in a frequency range lying far above its unambiguity limit and in its end ranges is each connected to a pyramid-shaped waveguide transition, the free end of which has a cross section such that it lies in the unambiguous range for the electromagnetic wave to be transmitted.
This embodiment is directed in particular to a rectangular waveguide of the designation SIRAL, which is operated in the ambiguous low-damping frequency range and has a mode filter for damping higher wave types, consisting of a damping plate located in the middle of the plane of the broad side and held in a foam body that completely fills the cross section. Losses and transferable performance are strongly influenced by the foam material.
the invention has for its object to provide a solution for an arrangement of the type mentioned in the least possible loss, free of higher wave types energy transfer.
the mode filter is subdivided into two half-mode filters, one of which is inserted flush in the respective end region of two waveguide sections to be connected to one another, which are only made by narrow lateral webs made of foam which rest against their inner wall are held.
the mode filter according to the invention which attenuates excited wave types directly at the point at which they are generated and has almost no influence on the basic wave type modulated with the signal.
the mode filter as shown in FIGS. 1 to 3, consists of a damping plate with a wall thickness of 0.05 to 2 mm, preferably 0.2 mm, of a dielectric substrate, in particular of glass fiber reinforced epoxy resin with a vapor-deposited metal layer, the surface resistance of which is 100 is up to 600 ⁇ .
This damping plate is designated 2 in the mode filter 1 for a straight waveguide section according to FIG. 2, 5 for a mode filter 4 in the cone for a waveguide transition according to FIG. 3.
the damping plate 2.5 is in the rectangular waveguide (SIRAL) in the waveguide center parallel to the broad side of the waveguide arranged (perpendicular to the E-vector of the basic wave type) and is held only by small webs of foam 3 or 6, which rest on the narrow sides of the waveguide. These contribute very little to the damping of the basic wave type, since the high-performance cross-sectional area of the waveguide remains almost completely free of disturbing and damping carrier material. The losses of the mode filter are therefore very low.
the mode filter is inserted into the waveguide transitions at both ends of the line, which enable connection to devices and antennas, and into waveguide couplings when connecting waveguide sections of the same cross-sectional dimensions in order to dampen the wave types that arise due to the small inhomogeneities of the waveguide.
a particular advantage of the mode filter according to the invention is that a half-mode filter can be inserted flush into each waveguide part in a simple manner when producing a waveguide.
the assembly for this is shown in FIGS. 4 and 5, a semi-mode filter 1 being first inserted flush into the laterally offset waveguide ends 7, 8, and then the waveguide is connected when the waveguide ends are in the same position (FIG. 5).
FIGS. 4 and 5 The assembly for this is shown in FIGS. 4 and 5, a semi-mode filter 1 being first inserted flush into the laterally offset waveguide ends 7, 8, and then the waveguide is connected when the waveguide ends are in the same position (FIG. 5).
FIG. 6 shows a corresponding illustration of the connection of a waveguide 8 to a waveguide transition 9, a semi-mode filter 1 according to FIG. 2 being inserted in the end region at the interface in the waveguide end piece 8 and a semimode filter 4 in conical shape according to FIG. 3 being inserted in the waveguide transition 9.

Landscapes

Control Of Motors That Do Not Use Commutators (AREA)

EP88115332A 1987-09-28 1988-09-19 Dispositif d'élimination de modes électromagnétiques parasites dans des installations à guides d'ondes Expired - Lifetime EP0309850B1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE3732678		1987-09-28
DE3732678		1987-09-28

Publications (3)

Publication Number	Publication Date
EP0309850A2 true EP0309850A2 (fr)	1989-04-05
EP0309850A3 EP0309850A3 (en)	1990-04-25
EP0309850B1 EP0309850B1 (fr)	1993-08-11

Family

ID=6337071

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP88115332A Expired - Lifetime EP0309850B1 (fr)	1987-09-28	1988-09-19	Dispositif d'élimination de modes électromagnétiques parasites dans des installations à guides d'ondes

Country Status (2)

Country	Link
EP (1)	EP0309850B1 (fr)
DE (1)	DE3883127D1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO1996038639A1 (fr) *	1995-06-02	1996-12-05	Industrial Research Limited	Element d'amortissement
DE19739589A1 (de) *	1997-09-10	1999-03-11	Alsthom Cge Alcatel	Modenfilter zur Verbindung von zwei elektromagnetischen Hohlleitern
WO2009030778A1 (fr) *	2007-09-06	2009-03-12	Becker Technologies Gmbh	Dispositif de blindage pour rayonnement électromagnétique
CN116313701A (zh) *	2023-03-17	2023-06-23	电子科技大学	一种用于回旋行波管的模式抑制装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US7893789B2 (en)	2006-12-12	2011-02-22	Andrew Llc	Waveguide transitions and method of forming components

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2760171A (en) *	1951-04-20	1956-08-21	Bell Telephone Labor Inc	Wave-guide mode filter
US2981906A (en) *	1957-10-14	1961-04-25	Bell Telephone Labor Inc	Resistance sheet microwave device
US3088082A (en) *	1959-10-05	1963-04-30	Philco Corp	Bandpass waveguide filter having iris and posts for resonating fundamental and vanes for absorbing harmonics
US4344053A (en) *	1981-02-12	1982-08-10	Litton Systems, Inc.	Mode suppressor for circular waveguides utilizing a plurality of resistance cards

1988
- 1988-09-19 EP EP88115332A patent/EP0309850B1/fr not_active Expired - Lifetime
- 1988-09-19 DE DE8888115332T patent/DE3883127D1/de not_active Expired - Fee Related

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO1996038639A1 (fr) *	1995-06-02	1996-12-05	Industrial Research Limited	Element d'amortissement
DE19739589A1 (de) *	1997-09-10	1999-03-11	Alsthom Cge Alcatel	Modenfilter zur Verbindung von zwei elektromagnetischen Hohlleitern
US6130586A (en) *	1997-09-10	2000-10-10	Alcatel	Mode filter for connecting two electromagnetic waveguides
WO2009030778A1 (fr) *	2007-09-06	2009-03-12	Becker Technologies Gmbh	Dispositif de blindage pour rayonnement électromagnétique
CN116313701A (zh) *	2023-03-17	2023-06-23	电子科技大学	一种用于回旋行波管的模式抑制装置

Also Published As

Publication number	Publication date
EP0309850A3 (en)	1990-04-25
EP0309850B1 (fr)	1993-08-11
DE3883127D1 (de)	1993-09-16

Legal Events

Date	Code	Title	Description
1989-02-18	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
1989-04-05	AK	Designated contracting states	Kind code of ref document: A2 Designated state(s): CH DE FR GB IT LI NL
1990-03-08	PUAL	Search report despatched	Free format text: ORIGINAL CODE: 0009013
1990-04-25	AK	Designated contracting states	Kind code of ref document: A3 Designated state(s): CH DE FR GB IT LI NL
1990-11-14	17P	Request for examination filed	Effective date: 19900919
1993-03-17	17Q	First examination report despatched	Effective date: 19930127
1993-06-25	GRAA	(expected) grant	Free format text: ORIGINAL CODE: 0009210
1993-08-11	AK	Designated contracting states	Kind code of ref document: B1 Designated state(s): CH DE FR GB IT LI NL
1993-08-11	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: FR Effective date: 19930811
1993-09-16	REF	Corresponds to:	Ref document number: 3883127 Country of ref document: DE Date of ref document: 19930916
1993-11-09	ITF	It: translation for a ep patent filed
1993-11-24	GBT	Gb: translation of ep patent filed (gb section 77(6)(a)/1977)	Effective date: 19931021
1993-12-31	EN	Fr: translation not filed
1994-06-11	PLBE	No opposition filed within time limit	Free format text: ORIGINAL CODE: 0009261
1994-06-11	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT
1994-08-03	26N	No opposition filed
1994-08-15	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: GB Payment date: 19940815 Year of fee payment: 7
1995-09-19	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: GB Effective date: 19950919
1996-05-15	GBPC	Gb: european patent ceased through non-payment of renewal fee	Effective date: 19950919
1996-09-16	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: NL Payment date: 19960916 Year of fee payment: 9
1996-11-18	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: DE Payment date: 19961118 Year of fee payment: 9
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1998-04-01	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: NL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19980401
1998-05-15	REG	Reference to a national code	Ref country code: CH Ref legal event code: PL
1998-06-02	NLV4	Nl: lapsed or anulled due to non-payment of the annual fee	Effective date: 19980401
1998-06-03	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19980603
2005-09-19	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20050919

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