WO1997019484A2 - Systeme pour attenuer des modes oscillatoires electromagnetiques haute frequence - Google Patents

Systeme pour attenuer des modes oscillatoires electromagnetiques haute frequence Download PDF

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Publication number
WO1997019484A2
WO1997019484A2 PCT/DE1996/002135 DE9602135W WO9719484A2 WO 1997019484 A2 WO1997019484 A2 WO 1997019484A2 DE 9602135 W DE9602135 W DE 9602135W WO 9719484 A2 WO9719484 A2 WO 9719484A2
Authority
WO
WIPO (PCT)
Prior art keywords
resistance
arrangement according
threads
arrangement
distance
Prior art date
Application number
PCT/DE1996/002135
Other languages
German (de)
English (en)
Other versions
WO1997019484A3 (fr
Inventor
Helmut Junghans
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO1997019484A2 publication Critical patent/WO1997019484A2/fr
Publication of WO1997019484A3 publication Critical patent/WO1997019484A3/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00—Coupling devices of the waveguide type
    • H01P5/12—Coupling devices having more than two ports
    • H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
    • H01P5/18—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers
    • H01P5/184—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers the guides being strip lines or microstrips
    • H01P5/185—Edge coupled lines
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/22—Attenuating devices

Definitions

  • the invention relates to an arrangement of the type specified in the preamble of claim 1.
  • steaming materials in massive form e.g. placed as a foam mat or as a large-area resistance film at locations to be determined empirically, so that the undesired or desired electromagnetic vibration is vaporized or this vibration is mismatched, so that as little as possible of the desired electromagnetic field energy is converted into the undesired vibration mode is set.
  • the invention has for its object to provide a solution for the vaporization of undesirable high-frequency electromagnetic oscillation modes in waveguides, in resonators and on the surface of HF-conducting circuits and for the defined vaporization of desired high-frequency electromagnetic oscillation modes.
  • FIGS. 6 and 7 sections of a circuit board with integrated circuits and resistance threads assigned to the lines.
  • the damping effect of such an arrangement is selectively limited to the electrical field component which runs parallel to the resistance thread. Since only resistance materials are used, a direct influence on the magnetic field component is excluded. The vaporization of the electric field perpendicular to the resistance threads is also practically irrelevant. So that the resistance threads do not themselves give rise to the excitation of an undesired oscillation mode, they have to be parallel to and at a sufficient distance from the possibly exciting part of the desired electric field.
  • the mode of operation of the resistance filaments is largely frequency-independent, but it is very selective with regard to the type of electromagnetic oscillation.
  • FIG. 1 shows an exemplary embodiment with a microwave-carrying substrate 1 which is arranged within a chamber 2.
  • a microwave-carrying substrate 1 which is arranged within a chamber 2.
  • an undesired odd mode between strip line 3 and chamber wall and between strip lines 3 is to be suppressed or locally mismatched.
  • the desired quasi TEM mode of the stripline should not be influenced.
  • the distance between the resistance threads4, which run between the strip lines 3 and between the strip lines 3 and the walls of the chamber 2 perpendicular to the strip lines 3 and to the chamber walls hm, is, for example, from a 50 ⁇ line the stripline is larger than the ground plane spacing.
  • FIG. 2 shows a cavity resonator 5 m in two sectional side views, in which an undesired cavity resonance is to be suppressed.
  • resistance threads 7 are applied to the chamber lid 6 parallel to the E-field of the room resonance on an insulating carrier 8 arranged perpendicular to the inside of the lid.
  • the carrier plate 10 of which consists of a dielectric substrate resting on the floor 11 of a metal housing 12 a high-frequency oscillation is to be damped by a fixed value.
  • the resistance threads 13 are arranged in the vicinity of the electromagnetic wave to be vaporized, again parallel to an E-field component.
  • a special application is e.g. a heavy-duty attenuator with a low-pass characteristic at low frequencies.
  • the distance of the resistance threads 13 from the strip line is smaller than the ground plane spacing.
  • the resistance threads can also touch the transmission line, whereby a low-pass filter with an absorbent stop band is obtained.
  • the limit frequency of such a low-pass filter depends on the length L and the width B of the arrangement.
  • the mutual distances and the width of the resistance threads can be of different sizes.
  • a different dimension solution brings advantages in the fine structure of a desired characteristic.
  • resistance threads 18 are arranged perpendicular to the two coupling lines 16, 17 with a parallel course, and end on both sides at a distance from the coupling lines.
  • FIG. 6 shows a partial representation of a circuit board with integrated circuits (image re ⁇ ection mixer suppressing mirror waves), in which resistance threads are applied to the substrate in a different arrangement near the conductor tracks.
  • the resistance threads of different areas are labeled A, B and C. They serve the odd
  • Mode vaporization at A as a low-pass filter with cut-off frequencies at approximately 200 MHz at B or the vaporization of the generated undesired second harmonics at C.
  • a surface resistance of, for example, 40 ⁇ 2 has been selected as a prophylactic measure against other modes.
  • FIG. 7 A similar representation of an integrated circuit (doubler with power coupler) is shown in FIG. 7, in which the resistance threads at A serve to vaporize the undesired second harmonics, at B to improve the coupler properties and at C to suppress the odd mode with the cam merwand and prophylactically against other undesirable modes are provided.

Abstract

En vue d'une atténuation de modes oscillatoires électromagnétiques haute fréquence et de résonances, des matériaux de résistance de structure filiforme sont appliqués sur un support isolant. Les fils de résistance sont parallèles les uns aux autres et à la composante de champ électrique. Leur largeur et la distance qui les sépare sont réduites par rapport à la longueur d'onde de l'oscillation électromagnétique à atténuer.
PCT/DE1996/002135 1995-11-23 1996-11-08 Systeme pour attenuer des modes oscillatoires electromagnetiques haute frequence WO1997019484A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19543842 1995-11-23
DE19543842.6 1995-11-23

Publications (2)

Publication Number Publication Date
WO1997019484A2 true WO1997019484A2 (fr) 1997-05-29
WO1997019484A3 WO1997019484A3 (fr) 1997-06-26

Family

ID=7778322

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1996/002135 WO1997019484A2 (fr) 1995-11-23 1996-11-08 Systeme pour attenuer des modes oscillatoires electromagnetiques haute frequence

Country Status (1)

Country Link
WO (1) WO1997019484A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1777775A1 (fr) * 2004-06-28 2007-04-25 Mitsubishi Denki Kabushiki Kaisha Substrat de ligne de transmission et boîtier de semiconducteur

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2821687A (en) * 1946-04-12 1958-01-28 William O Smith Grid-type wave guide attenuator
DE1035224B (de) * 1953-12-17 1958-07-31 Gen Electric Co Ltd Elektrisches Daempfungsglied
US3155929A (en) * 1962-12-06 1964-11-03 Polytechnic Inst Brooklyn H-guide attenuator

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51126741A (en) * 1975-04-28 1976-11-05 Nippon Telegr & Teleph Corp <Ntt> Non-return filter.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2821687A (en) * 1946-04-12 1958-01-28 William O Smith Grid-type wave guide attenuator
DE1035224B (de) * 1953-12-17 1958-07-31 Gen Electric Co Ltd Elektrisches Daempfungsglied
US3155929A (en) * 1962-12-06 1964-11-03 Polytechnic Inst Brooklyn H-guide attenuator

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
IEE PROCEEDINGS H MICROWAVES, ANTENNAS & PROPAGATION., Bd. 129, Nr. 3, Juni 1982, STEVENAGE GB, Seiten 94-98, XP002030606 A. JENKINS ET AL.: "Resistive 4-port directional coupler" *
PATENT ABSTRACTS OF JAPAN vol. 1, no. 32 (E-76) [1404] , 29.März 1977 & JP 51 126741 A (NIPPON DENSHIN DENWA KOSHA), 5.November 1976, *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1777775A1 (fr) * 2004-06-28 2007-04-25 Mitsubishi Denki Kabushiki Kaisha Substrat de ligne de transmission et boîtier de semiconducteur
EP1777775A4 (fr) * 2004-06-28 2009-04-15 Mitsubishi Electric Corp Substrat de ligne de transmission et boîtier de semiconducteur
EP2463952A1 (fr) * 2004-06-28 2012-06-13 Mitsubishi Electric Corporation Substrat de ligne de transmission et boitier de semiconducteur
EP2463953A1 (fr) * 2004-06-28 2012-06-13 Mitsubishi Electric Corporation Substrat de ligne de transmission et boitier de semiconducteur
EP3229310A3 (fr) * 2004-06-28 2018-01-10 Mitsubishi Electric Corporation Substrat de ligne de transmission et boitier de semiconducteur

Also Published As

Publication number Publication date
WO1997019484A3 (fr) 1997-06-26

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