GB156654A - Improvements in wireless antenna systems - Google Patents

Improvements in wireless antenna systems

Info

Publication number
GB156654A
GB156654A GB638/21A GB63821A GB156654A GB 156654 A GB156654 A GB 156654A GB 638/21 A GB638/21 A GB 638/21A GB 63821 A GB63821 A GB 63821A GB 156654 A GB156654 A GB 156654A
Authority
GB
United Kingdom
Prior art keywords
aerial
waves
wave
tuned
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
GB638/21A
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.)
Telefunken AG
Original Assignee
Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
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 Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH filed Critical Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
Publication of GB156654A publication Critical patent/GB156654A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements

Landscapes

  • Radio Transmission System (AREA)
  • Radio Relay Systems (AREA)

Abstract

156,654. Ges. f³r Drahtlose Telegraphie. Oct. 11, 1919, [Convention date]. Diplex, duplex, and multiplex signalling; secret and selective signalling systems. -In a system for duplex working, the aerial is branched below the coupling to the transmitter, and the receiver is connected to points where the potential due to the transmitted wave is substantially zero. In an example the aerial is branched below the transmitter S and microphone M and the receiver is coupled to the branch a at R. Rejector circuits tuned respectively to the sending and receiving waves are included in the branches a, b. The sending branch b is tuned as a whole to the sending wave, and the branch a together with the aerial, to the receiving wave. The Specification as open to inspection under Sect. 91 (3) (a) also describes various arrangements for multiplex transmission or reception or both depending on the use of different wavelengths, the antenna being divided into as many branches as the wavelengths employed, each being tuned with the aerial to its particular wave, and containing rejector circuits tuned to each of the other waves. A method of diplex on this principle is described which is stated to be specially applicable for a method in which two waves are needed to actuate a receiver, or two interfering waves are transmitted to produce a directly audible signal. This subject-matter does not appear in the Specification as accepted. Reference has been directed by the Comptroller to Specification 135,895.
GB638/21A 1919-10-11 1921-01-06 Improvements in wireless antenna systems Expired GB156654A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE156654X 1919-10-11

Publications (1)

Publication Number Publication Date
GB156654A true GB156654A (en) 1922-05-08

Family

ID=5677998

Family Applications (1)

Application Number Title Priority Date Filing Date
GB638/21A Expired GB156654A (en) 1919-10-11 1921-01-06 Improvements in wireless antenna systems

Country Status (1)

Country Link
GB (1) GB156654A (en)

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