GB530407A - Improvements in or relating to radio and like systems - Google Patents

Improvements in or relating to radio and like systems

Info

Publication number
GB530407A
GB530407A GB18251/39A GB1825139A GB530407A GB 530407 A GB530407 A GB 530407A GB 18251/39 A GB18251/39 A GB 18251/39A GB 1825139 A GB1825139 A GB 1825139A GB 530407 A GB530407 A GB 530407A
Authority
GB
United Kingdom
Prior art keywords
phase
inductance
coils
branch
variable condenser
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
GB18251/39A
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.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi Co Ltd
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 Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Publication of GB530407A publication Critical patent/GB530407A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
    • H01Q1/525—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas between emitting and receiving antennas
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/18—Networks for phase shifting
    • H03H7/20—Two-port phase shifters providing an adjustable phase shift

Landscapes

  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

530,407. Wireless signalling; phase-changing networks. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. June 22, 1939, No. 18251. Convention date, July 30, 1938. [Class 40 (v)] [Also in Group XXXV] A phase splitting network comprises a pair of input terminals 1, 2 between which are connected in series a variable condenser K and a closed circuit formed of two parallel branches. One branch comprises a fixed condenser C<SP>1</SP>, resistance r, inductance L and variable condenser C. The other branch comprises an inductance L<SP>1</SP> and elements r, L, C identical with the corresponding elements in the first branch. The two coils L are wound on formers at right-angles to produce a rotating field. By manipulating a pick-up coil R mounted on the common axis of coils L1, L, a voltage of desired phase is produced at output terminals 3, 4. By suitably choosing the valves of L<SP>1</SP> and C<SP>1</SP> the desired splitting action is approximately obtained over a wide frequency range. Fig. 3 shows a network N of the above kind used to inject into the aerial circuit of a receiver RC a voltage equal and opposite to that received by interference from a nearby transmitter T.
GB18251/39A 1938-07-30 1939-06-22 Improvements in or relating to radio and like systems Expired GB530407A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US530407XA 1938-07-30 1938-07-30

Publications (1)

Publication Number Publication Date
GB530407A true GB530407A (en) 1940-12-11

Family

ID=21981539

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18251/39A Expired GB530407A (en) 1938-07-30 1939-06-22 Improvements in or relating to radio and like systems

Country Status (1)

Country Link
GB (1) GB530407A (en)

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