EP0715368A1 - Waveguide-coaxial converter - Google Patents

Waveguide-coaxial converter Download PDF

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Publication number
EP0715368A1
EP0715368A1 EP95118368A EP95118368A EP0715368A1 EP 0715368 A1 EP0715368 A1 EP 0715368A1 EP 95118368 A EP95118368 A EP 95118368A EP 95118368 A EP95118368 A EP 95118368A EP 0715368 A1 EP0715368 A1 EP 0715368A1
Authority
EP
European Patent Office
Prior art keywords
waveguide
passage
low
pass filter
cavity
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.)
Withdrawn
Application number
EP95118368A
Other languages
German (de)
English (en)
French (fr)
Inventor
Keiichi c/o NEC Engineering Ltd. Umezu
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.)
NEC Corp
Original Assignee
NEC 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.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Publication of EP0715368A1 publication Critical patent/EP0715368A1/en
Withdrawn legal-status Critical Current

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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
    • H01P5/08—Coupling devices of the waveguide type for linking dissimilar lines or devices
    • H01P5/10—Coupling devices of the waveguide type for linking dissimilar lines or devices for coupling balanced lines or devices with unbalanced lines or devices
    • H01P5/103—Hollow-waveguide/coaxial-line transitions

Definitions

  • the present invention relates to a waveguide-coaxial converter used in connecting a coaxial line and a square waveguide used in a communication device, and particularly to waveguide-coaxial converter provided with a connector for a coaxial line connection at a prescribed portion of a square waveguide.
  • Waveguide-coaxial converters having a low-pass filter for eliminating higher harmonics are known in the art.
  • the configuration of one example of such a waveguide-coaxial converter is shown in Fig. 1, which shows a coaxial low-pass filter 8 connected by means of a connector 2 to a wide outer wall portion in the vicinity of the terminal portion of a square waveguide 1, or as shown in Figs. 2A and 2B, which show a waveguide low-pass filter 9 having fine sorted blocks 10 provided on the inner wall of the waveguide.
  • waveguide-coaxial converters of the above-described prior art having an independent coaxial low-pass filter 8 provided on the wide outer wall surface of the waveguide-coaxial converter results in a bulky shape, and this presents difficulties in miniaturization.
  • waveguide low-pass filter 9 shown in Figs. 2A and 2B the necessity for precise machining of the fine blocks 10 results in difficulties in manufacturing.
  • the object of the present invention is to provide a waveguide-coaxial converter having low-pass filter functions that features simple and compact construction.
  • the present invention proposes a waveguide-coaxial converter wherein a passage is formed penetrating the side wall of a square waveguide and communicating with a cavity of the square waveguide; a connector is provided in a portion of the passage such that a core conductor passes through the passage and is directed toward the cavity; a low-pass filter made up of a plurality of joined conductors of differing impedance is provided at a portion of the core conductor within the passage; and the core conductor which extends through the low-pass filter, protrudes from the inner wall of the square waveguide and into the cavity a distance matching a pass band.
  • a low-pass filter is constructed by sequentially joining conductors of high-impedance form and conductors of low-impedance form to the core conductor of the connector, this structure being secured to the wall of the square-wave waveguide by covering (holding) it with, for example, an insulative support member.
  • the core conductor extending from the low-pass filter matches the pass band, and therefore, possesses low-pass filter functions as well as probe functions without causing interference with the pass band. In this way, manufacturing is far easier and significantly less expensive than a construction having an added low-pass filter or a construction in which a plurality of conductors or dielectrics are arranged on the inner wall of a waveguide.
  • an insulative columnar support having the same outer diameter as the passage passes through the passage and is secured to the square waveguide, and the core conductors and low-pass filter of the connector are fixed in the interior of the insulative support.
  • a construction is possible by which the end surface on the cavity side of the insulative support directly contacts the inner wall of the square-wave waveguide.
  • a connector 2 for connection to an unshown exterior coaxial line is arranged at a prescribed position on the outer wall of a square-waveguide 1, the waveguide at the position of arrangement of this connector having a greater wall thickness, and a passage being formed that communicates with a cavity 12 in the square waveguide 1.
  • a columnar insulative support for example a Teflon support 5 made from PTFE (Polytetrafluoroethylene; commercial name: Teflon) having an outer diameter equal to the diameter of the passage 11 is inserted into the passage 11 and secured to the square waveguide 1.
  • One end surface portion of the Teflon support 5 is directed toward the connector 2, the other end surface portion directly contacts the inner wall of the square waveguide opposing the passage 11, and in the interior of the Teflon support 5 are secured a low-pass filter 3 and an antenna conductor 4 protruding from the inner wall of the square waveguide and into the waveguide cavity 12 a distance exactly matching the pass band, the low-pass filter 3 and the antenna conductor 4 being formed in a unit with the core conductor of the connector 2.
  • the antenna conductor 4 extracts those microwaves propagated inside the square waveguide 1 that are in the pass band of the low-pass filter 3, and the position, shape and material of the antenna conductor 4 are matched to the above-described pass band.
  • the low-pass filter 3 is constructed by connecting alternating high-impedance portions 6 and low-impedance portions 7 arranged in the axial direction of the coaxial line in the passage position of the core conductor of the connector 2.
  • the difference between the high-impedance portions 6 and low-impedance portions 7 is determined by the shape and construction of the conductor for their employed frequencies, and can be freely set in accordance with the pass band.
  • a waveguide-coaxial converter of this type of configuration is more compact overall and has a simpler structure and fewer parts than the construction shown in Fig. 1 in which a low-pass filter is added. In addition, this construction is easier to manufacture than a waveguide-type low-pass filter such as is shown in Fig. 2.
  • the present invention is not limited to the above-described embodiment and allows a variety of modifications.
  • the insulative support may be formed from materials that do not affect microwaves other than that of the Teflon support 5, and the shape and construction shown in Fig. 3 and Fig. 4 need not be adopted as long as the material of the support is strong and secure.
  • the structure of the low-pass filter 3 joined to the core conductor of the connector 2 is not necessarily restricted to the structure shown in the figures.

Landscapes

  • Control Of Motors That Do Not Use Commutators (AREA)
  • Waveguides (AREA)
EP95118368A 1994-11-28 1995-11-22 Waveguide-coaxial converter Withdrawn EP0715368A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP29252494A JPH08154008A (ja) 1994-11-28 1994-11-28 導波管同軸変換器
JP292524/94 1994-11-28

Publications (1)

Publication Number Publication Date
EP0715368A1 true EP0715368A1 (en) 1996-06-05

Family

ID=17782928

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95118368A Withdrawn EP0715368A1 (en) 1994-11-28 1995-11-22 Waveguide-coaxial converter

Country Status (6)

Country Link
EP (1) EP0715368A1 (https=)
JP (1) JPH08154008A (https=)
CN (1) CN1041583C (https=)
AU (1) AU706590B2 (https=)
CA (1) CA2163323C (https=)
TW (1) TW301815B (https=)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1443589A1 (en) * 2003-01-31 2004-08-04 Thomson Licensing S.A. Transition between a microstrip circuit and a waveguide and outside transmission reception unit incorporating the transition
WO2008130865A3 (en) * 2007-04-19 2011-07-14 Raytheon Company Spring loaded microwave interconnector
DE102011106568A1 (de) * 2011-06-28 2013-01-03 Krohne Messtechnik Gmbh Schwimmkörper zur Anzeige eines Füllstandes
CN105244575A (zh) * 2015-10-30 2016-01-13 成都天奥电子股份有限公司 一种新型介质腔体滤波器
RU2634334C1 (ru) * 2016-07-07 2017-10-25 Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом" (Госкорпорация "Росатом") Устройство возбуждения квадратного волновода

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2429119A (en) * 2005-08-10 2007-02-14 Marconi Comm Gmbh Waveguide junction with angular offset
CN106877097A (zh) * 2017-02-27 2017-06-20 上海航天科工电器研究院有限公司 一种双联的波导转同轴电缆组件
CN111063973B (zh) * 2019-11-28 2021-11-30 京信通信技术(广州)有限公司 射频器件及同轴端口与波导端口的转换装置
JP7596838B2 (ja) * 2021-02-17 2024-12-10 株式会社デンソー アンテナ装置
CN116487845A (zh) * 2023-04-28 2023-07-25 河南星桥源电子科技有限公司 一种基于波导微带转换的中等功率滤波器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57204605A (en) * 1981-06-12 1982-12-15 Nec Corp Transducer
JPS62172802A (ja) * 1986-01-27 1987-07-29 Fujitsu Ltd 同軸−導波管変換器
JPS6373702A (ja) * 1986-09-16 1988-04-04 Fujitsu Ltd 同軸導波管変換器
JPS63260301A (ja) * 1987-04-17 1988-10-27 Nec Corp 同軸導波管変換器
FR2646562A1 (fr) * 1989-04-28 1990-11-02 Alcatel Transmission Transition guide-coaxial pour guide d'ondes apte a propager deux ondes en mode te11

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2829348A (en) * 1952-04-02 1958-04-01 Itt Line-above-ground to hollow waveguide coupling

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57204605A (en) * 1981-06-12 1982-12-15 Nec Corp Transducer
JPS62172802A (ja) * 1986-01-27 1987-07-29 Fujitsu Ltd 同軸−導波管変換器
JPS6373702A (ja) * 1986-09-16 1988-04-04 Fujitsu Ltd 同軸導波管変換器
JPS63260301A (ja) * 1987-04-17 1988-10-27 Nec Corp 同軸導波管変換器
FR2646562A1 (fr) * 1989-04-28 1990-11-02 Alcatel Transmission Transition guide-coaxial pour guide d'ondes apte a propager deux ondes en mode te11

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 012, no. 304 (E - 646) 18 August 1988 (1988-08-18) *
PATENT ABSTRACTS OF JAPAN vol. 12, no. 13 (E - 573) 14 January 1988 (1988-01-14) *
PATENT ABSTRACTS OF JAPAN vol. 13, no. 81 (E - 719) 23 February 1989 (1989-02-23) *
PATENT ABSTRACTS OF JAPAN vol. 7, no. 58 (E - 163) 10 March 1983 (1983-03-10) *
R.B. QUINN: "Waveguide-to-coax transition/low-pass filter", NASA TECH BRIEFS, vol. 1, no. 2, WASHINGTON US, pages 160, XP001366281 *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1443589A1 (en) * 2003-01-31 2004-08-04 Thomson Licensing S.A. Transition between a microstrip circuit and a waveguide and outside transmission reception unit incorporating the transition
FR2850793A1 (fr) * 2003-01-31 2004-08-06 Thomson Licensing Sa Transition entre un circuit micro-ruban et un guide d'onde et unite exterieure d'emission reception incorporant la transition
US7148766B2 (en) 2003-01-31 2006-12-12 Thomson Licensing Transition between a microstrip circuit and a waveguide including a band stop filter and outside transmission reception unit incorporating the transition
WO2008130865A3 (en) * 2007-04-19 2011-07-14 Raytheon Company Spring loaded microwave interconnector
DE102011106568A1 (de) * 2011-06-28 2013-01-03 Krohne Messtechnik Gmbh Schwimmkörper zur Anzeige eines Füllstandes
DE102011106568B4 (de) * 2011-06-28 2013-09-19 Krohne Messtechnik Gmbh Schwimmkörper zur Anzeige eines Füllstandes
US8881589B2 (en) 2011-06-28 2014-11-11 Krohne Messtechnik Gmbh Float for displaying a fill level
CN105244575A (zh) * 2015-10-30 2016-01-13 成都天奥电子股份有限公司 一种新型介质腔体滤波器
CN105244575B (zh) * 2015-10-30 2019-01-22 成都天奥电子股份有限公司 一种新型介质腔体滤波器
RU2634334C1 (ru) * 2016-07-07 2017-10-25 Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом" (Госкорпорация "Росатом") Устройство возбуждения квадратного волновода

Also Published As

Publication number Publication date
TW301815B (https=) 1997-04-01
AU3794695A (en) 1996-06-06
CN1127435A (zh) 1996-07-24
CN1041583C (zh) 1999-01-06
AU706590B2 (en) 1999-06-17
CA2163323A1 (en) 1996-05-29
JPH08154008A (ja) 1996-06-11
CA2163323C (en) 1999-12-28

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