GB583161A - Improvements in apparatus for simultaneously or alternately transmitting and receiving radio signals of very high frequency - Google Patents

Improvements in apparatus for simultaneously or alternately transmitting and receiving radio signals of very high frequency

Info

Publication number
GB583161A
GB583161A GB49/41A GB4941A GB583161A GB 583161 A GB583161 A GB 583161A GB 49/41 A GB49/41 A GB 49/41A GB 4941 A GB4941 A GB 4941A GB 583161 A GB583161 A GB 583161A
Authority
GB
United Kingdom
Prior art keywords
wave
loop
lines
transmitter
receiver
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
GB49/41A
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB49/41A priority Critical patent/GB583161A/en
Priority to US425431A priority patent/US2424156A/en
Publication of GB583161A publication Critical patent/GB583161A/en
Expired legal-status Critical Current

Links

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
    • 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
    • H01P5/19—Conjugate devices, i.e. devices having at least one port decoupled from one other port of the junction type
    • H01P5/22—Hybrid ring junctions

Landscapes

  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Near-Field Transmission Systems (AREA)
  • Train Traffic Observation, Control, And Security (AREA)

Abstract

583,161. Duplex wireless signalling ; filter circuits. GENERAL ELECTRIC CO., Ltd., and ESPLEY, D. C. Jan. 2, 1941, No. 49. [Classes 40 (iii) and 40 (v)] Apparatus for preventing transmitted signals from entering the receiving circuit in a duplex short-wave radio system comprises a closed loop PRQS, Fig. 2, of concentric transmission line with the aerial A connected at P, the transmitter T at R, a balancing impedance at Q, and the receiver RE at S. The concentric lines constituting the loop, the aerial feed, and the feed to the balancing impedance have each a characteristic impedance Zo, while the transmitter and receiver are each connected to the loop by quarter-wave lines of characteristic impedance Zo/#2. The loop is so dimensioned that the path PRQ differs from the path PSQ by half a wave-length or an odd multiple thereof; and the points R, S are so chosen that RPS differs from RQS by the same amount. In a constructional example shown in Fig. 3, the concentric lines are formed by inserting axial rods in cylindrical holes 19 drilled in a metal block 1, the connections to the aerial, transmitter, balance and receiver, being made at 2, 3, 4, 5 respectively. The loop thus comprises a rectangle 14, 15, 16, 17 with one side a half-wave and the other a quarter-wave in length. Concentric lines 6, 7, 8 with movable bridges 21, 22, 23 are provided for adjustment; the line 6 for eliminating the effects bf the right-angled junctions, and the lines 7, 8 to serve as a transformer and resonator by which the effective resistance of the carbon plate 13, may be varied. Specification 491,359 is referred to.
GB49/41A 1941-01-02 1941-01-02 Improvements in apparatus for simultaneously or alternately transmitting and receiving radio signals of very high frequency Expired GB583161A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB49/41A GB583161A (en) 1941-01-02 1941-01-02 Improvements in apparatus for simultaneously or alternately transmitting and receiving radio signals of very high frequency
US425431A US2424156A (en) 1941-01-02 1942-01-02 Apparatus for transmitting and receiving radio signals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB49/41A GB583161A (en) 1941-01-02 1941-01-02 Improvements in apparatus for simultaneously or alternately transmitting and receiving radio signals of very high frequency

Publications (1)

Publication Number Publication Date
GB583161A true GB583161A (en) 1946-12-11

Family

ID=9697478

Family Applications (1)

Application Number Title Priority Date Filing Date
GB49/41A Expired GB583161A (en) 1941-01-02 1941-01-02 Improvements in apparatus for simultaneously or alternately transmitting and receiving radio signals of very high frequency

Country Status (2)

Country Link
US (1) US2424156A (en)
GB (1) GB583161A (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2666132A (en) * 1941-01-28 1954-01-12 Wilmer L Barrow Ultrahigh-frequency bridge circuit and apparatus
NL94033C (en) * 1942-12-31
US2534624A (en) * 1943-05-29 1950-12-19 Hartford Nat Bank & Trust Co Transmitting device
US2544842A (en) * 1943-06-23 1951-03-13 James L Lawson Overload protection of highfrequency receivers
US2552489A (en) * 1943-06-24 1951-05-08 James L Lawson Method and apparatus for adjusting radio echo detection systems
US2681987A (en) * 1946-06-05 1954-06-22 Us Navy Transmission system for radio echo detection systems
US2587590A (en) * 1946-07-26 1952-03-04 Sperry Corp Ultrahigh-frequency apparatus
US2507915A (en) * 1946-08-28 1950-05-16 Rca Corp Coupling circuit
US2500795A (en) * 1946-11-02 1950-03-14 Raytheon Mfg Co Combined transmitter-receiver for radio communication systems
US2614170A (en) * 1947-10-04 1952-10-14 Fr Sadir Carpentier Soc Directional coupler for polyphase networks
US2856599A (en) * 1948-04-22 1958-10-14 Gen Precision Lab Inc Pulsed magnetron system
US2699548A (en) * 1949-12-31 1955-01-11 Motorola Inc Wave guide structure for microwave radio systems
US4103237A (en) * 1955-12-15 1978-07-25 International Telephone & Telegraph Corp. Radio jamming system
US3467919A (en) * 1967-08-30 1969-09-16 Andrew Alford Apparatus for unequal power division exhibiting hybrid properties
US4051475A (en) * 1976-07-21 1977-09-27 The United States Ofamerica As Represented By The Secretary Of The Army Radio receiver isolation system
US5023866A (en) * 1987-02-27 1991-06-11 Motorola, Inc. Duplexer filter having harmonic rejection to control flyback
DE4119631A1 (en) * 1991-06-14 1992-12-17 Rohde & Schwarz CIRCUIT TO SPLIT OR MERGE HIGH FREQUENCY POWER
JP4373954B2 (en) * 2005-04-11 2009-11-25 株式会社エヌ・ティ・ティ・ドコモ 90 degree hybrid circuit

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2229078A (en) * 1938-04-01 1941-01-21 Rca Corp Radio relaying system

Also Published As

Publication number Publication date
US2424156A (en) 1947-07-15

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