GB490485A - Superheterodyne radio receiving systems for receiving two signals with a single antenna - Google Patents

Superheterodyne radio receiving systems for receiving two signals with a single antenna

Info

Publication number
GB490485A
GB490485A GB26963/37A GB2696337A GB490485A GB 490485 A GB490485 A GB 490485A GB 26963/37 A GB26963/37 A GB 26963/37A GB 2696337 A GB2696337 A GB 2696337A GB 490485 A GB490485 A GB 490485A
Authority
GB
United Kingdom
Prior art keywords
signals
receiving
coupling
coupled
aerial
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
GB26963/37A
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.)
Alcatel Lucent Deutschland AG
C Lorenz AG
Original Assignee
Standard Elektrik Lorenz AG
C Lorenz AG
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 Standard Elektrik Lorenz AG, C Lorenz AG filed Critical Standard Elektrik Lorenz AG
Publication of GB490485A publication Critical patent/GB490485A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L15/00—Apparatus or local circuits for transmitting or receiving dot-and-dash codes, e.g. Morse code
    • H04L15/24—Apparatus or circuits at the receiving end
    • H04L15/26—Apparatus or circuits at the receiving end operating only on reception of predetermined code signals, e.g. distress signals, party-line call signals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61G—COUPLINGS; DRAUGHT AND BUFFING APPLIANCES
    • B61G11/00—Buffers
    • B61G11/14—Buffers absorbing shocks by mechanical friction action; Combinations of mechanical shock-absorbers and springs
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/26—Circuits for superheterodyne receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems

Abstract

490,485. Wireless signalling. LORENZ AKT.-GES., C. Oct. 5, 1937, No. 26963. Convention date, Oct. 7, 1936. [Class 40 (v)] To enable a superheterodyne receiver to receive signals simultaneously on two wavelengths, the intermediate frequency is arranged to be the same frequency as that of the wanted transmission and a single aerial is coupled to both the heterodyning part of the receiver and the i.f. amplifier. As shown the heterodyning part 1 of the receiver is coupled to aerial A by coupling 4, the i.f. signals being fed to the i.f. amplifier 2. The aerial is also coupled to the i.f. amplifier directly by coupling 5 through rejector device 3 which is provided to prevent back-coupling. The apparatus is intended to be used for the receipt of distress signals, the intermediate frequency being equal to that on which distress signals are broadcast.
GB26963/37A 1936-10-07 1937-10-05 Superheterodyne radio receiving systems for receiving two signals with a single antenna Expired GB490485A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE750716T 1936-10-07

Publications (1)

Publication Number Publication Date
GB490485A true GB490485A (en) 1938-08-16

Family

ID=6544118

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26963/37A Expired GB490485A (en) 1936-10-07 1937-10-05 Superheterodyne radio receiving systems for receiving two signals with a single antenna

Country Status (6)

Country Link
US (1) US2195888A (en)
BE (1) BE382543A (en)
DE (1) DE750716C (en)
FR (1) FR827205A (en)
GB (1) GB490485A (en)
NL (1) NL47611C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE764713C (en) * 1938-11-12 1953-06-08 Aeg Method for transmitting a call signal to a receiver for frequency-modulated oscillations that is already connected to another transmitter

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE392979C (en) * 1922-06-25 1924-03-31 Erwin Kindler Transmitter and receiver circuit for multiple telegraphy and telephony on one wave
FR699825A (en) * 1930-07-18 1931-02-20 Device for adapting a radio receiver to receiving waves that it cannot receive directly
DE600193C (en) * 1932-07-02 1935-09-28 Telefunken Gmbh Device for displaying both the flight target direction by means of reception on longer waves and the landing field strength by means of reception of ultrashort waves
CH169877A (en) * 1933-09-07 1934-06-15 Komet Radio A G Additional device for radio receivers to expand the waveband to include long waves.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE764713C (en) * 1938-11-12 1953-06-08 Aeg Method for transmitting a call signal to a receiver for frequency-modulated oscillations that is already connected to another transmitter

Also Published As

Publication number Publication date
US2195888A (en) 1940-04-02
NL47611C (en) 1940-01-15
FR827205A (en) 1938-04-21
DE750716C (en) 1945-01-26
BE382543A (en) 1931-10-31

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