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 frequencyInfo
- 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
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.
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2229078A (en) * | 1938-04-01 | 1941-01-21 | Rca Corp | Radio relaying system |
-
1941
- 1941-01-02 GB GB49/41A patent/GB583161A/en not_active Expired
-
1942
- 1942-01-02 US US425431A patent/US2424156A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US2424156A (en) | 1947-07-15 |
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