GB1408968A - Radio frequency switch employing reed units and a quarter wave line - Google Patents

Radio frequency switch employing reed units and a quarter wave line

Info

Publication number
GB1408968A
GB1408968A GB3664473A GB3664473A GB1408968A GB 1408968 A GB1408968 A GB 1408968A GB 3664473 A GB3664473 A GB 3664473A GB 3664473 A GB3664473 A GB 3664473A GB 1408968 A GB1408968 A GB 1408968A
Authority
GB
United Kingdom
Prior art keywords
antenna
quarter wave
line
units
impedance
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.)
Expired
Application number
GB3664473A
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.)
Motorola Solutions Inc
Original Assignee
Motorola Inc
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 Motorola Inc filed Critical Motorola Inc
Publication of GB1408968A publication Critical patent/GB1408968A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/28—Relays having both armature and contacts within a sealed casing outside which the operating coil is located, e.g. contact carried by a magnetic leaf spring or reed
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/10—Auxiliary devices for switching or interrupting
    • H01P1/12—Auxiliary devices for switching or interrupting by mechanical chopper

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

1408968 Radio signalling MOTOROLA Inc 1 Aug 1973 [7 Sept 1972] 36644/73 Heading H4L [Also in Division H1] A system 1 for switching an antenna 10 between a transmitter 18 and receiver 20 has normally open reed contact units 12, 24 and an impedance inverting network, such as a quarter wave transmission line 14. In the normal condition shown the antenna 10 is connected to the receiver 20 through the line 14 but when an electromagnetic coil 30 is energized to close the contacts of units 12, 14 the transmitter 18 is connected to the antenna 10 and the earth connection provided through a capacitor 26 and the contact unit 24 is of such low impedance as to ensure a high impedance will appear at the other terminal of the line 14. Alternatively the impedance inverting network may be a wave guide, lumped circuit element network of a transmission line having a length equal to an odd integral number of quarter wavelengths.
GB3664473A 1972-09-07 1973-08-01 Radio frequency switch employing reed units and a quarter wave line Expired GB1408968A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00287129A US3800222A (en) 1972-09-07 1972-09-07 Radio frequency switch employing reed switches and a quarter wave line

Publications (1)

Publication Number Publication Date
GB1408968A true GB1408968A (en) 1975-10-08

Family

ID=23101579

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3664473A Expired GB1408968A (en) 1972-09-07 1973-08-01 Radio frequency switch employing reed units and a quarter wave line

Country Status (4)

Country Link
US (1) US3800222A (en)
AU (1) AU470950B2 (en)
CA (1) CA977046A (en)
GB (1) GB1408968A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991012598A1 (en) * 1990-02-19 1991-08-22 Karsten Gyde Pilested A security system for surveilling the passage of commodities through defined zones
GB2336477A (en) * 1998-04-14 1999-10-20 Motorola Gmbh Antenna coupler for hand-held radio
CN117133592A (en) * 2023-10-27 2023-11-28 嘉准传感科技（湖南）有限公司 Magnetic induction proximity switch

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5048116A (en) * 1989-05-24 1991-09-10 Motorola, Inc. Signal routing system
US5060293A (en) * 1989-10-20 1991-10-22 Motorola, Inc. Antenna switch for transmit-receive operation using relays and diodes
WO1994015408A1 (en) * 1992-12-22 1994-07-07 Motorola Inc. Rf antenna switch and method of operating the same
DE4336929A1 (en) * 1993-10-29 1995-05-04 Deutsche Aerospace High frequency circuit breakers
CA2147410A1 (en) * 1995-04-20 1996-10-21 Robert L. Romerein Circuitry for use with coaxial cable distribution networks
CA2160854A1 (en) * 1995-10-18 1997-04-19 Robert L. Romerein Top exit coupler
JP3082841B2 (en) * 1997-09-11 2000-08-28 日本電気株式会社 Broadcaster output signal distribution and synthesis device
JP2002050980A (en) * 2000-08-04 2002-02-15 Matsushita Electric Ind Co Ltd High frequency switch and radio communication apparatus using the switch
US20030148794A1 (en) * 2002-02-01 2003-08-07 Wilson Charles M. Cellular communications tower connection device
US20050128039A1 (en) * 2003-12-16 2005-06-16 Kung-Hua Weng Structure of coil inductor wave filter magnet core

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2485606A (en) * 1944-06-27 1949-10-25 Standard Telephones Cables Ltd Protective coupling circuit
BE569688A (en) * 1957-07-25
US3327215A (en) * 1964-09-18 1967-06-20 Motorola Inc Electronic circuit for selectively connecting a transmitter and a receiver to a single antenna
US3562597A (en) * 1969-09-10 1971-02-09 Motorola Inc Rf coaxial relay

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991012598A1 (en) * 1990-02-19 1991-08-22 Karsten Gyde Pilested A security system for surveilling the passage of commodities through defined zones
US5471196A (en) * 1990-02-19 1995-11-28 Pilested; Karsten G. Security system for surveilling the passage of commodities through defined zones
GB2336477A (en) * 1998-04-14 1999-10-20 Motorola Gmbh Antenna coupler for hand-held radio
GB2336477B (en) * 1998-04-14 2000-03-29 Motorola Gmbh Antenna coupler
CN117133592A (en) * 2023-10-27 2023-11-28 嘉准传感科技（湖南）有限公司 Magnetic induction proximity switch
CN117133592B (en) * 2023-10-27 2024-01-16 嘉准传感科技（湖南）有限公司 Magnetic induction proximity switch

Also Published As

Publication number Publication date
AU470950B2 (en) 1976-04-01
AU5951273A (en) 1975-02-27
US3800222A (en) 1974-03-26
CA977046A (en) 1975-10-28

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee