GB579567A - Improvements in frequency controlling and stabilising means in radio-apparatus and the like - Google Patents

Improvements in frequency controlling and stabilising means in radio-apparatus and the like

Info

Publication number
GB579567A
GB579567A GB16450/43A GB1645043A GB579567A GB 579567 A GB579567 A GB 579567A GB 16450/43 A GB16450/43 A GB 16450/43A GB 1645043 A GB1645043 A GB 1645043A GB 579567 A GB579567 A GB 579567A
Authority
GB
United Kingdom
Prior art keywords
frequency
oscillator
transmitting
changer
multiplied
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
GB16450/43A
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph 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 filed Critical Marconis Wireless Telegraph Co Ltd
Priority to GB16450/43A priority Critical patent/GB579567A/en
Priority to US579994A priority patent/US2460781A/en
Publication of GB579567A publication Critical patent/GB579567A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/54—Circuits using the same frequency for two directions of communication
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/02—Details

Abstract

579,567. Automatic tuning correction. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., and CANTELO, H. R. Oct. 7, 1943, No. 16450. [Class 40 (v)] [Also in Group XXXV] In a combined transmitting and receiving radio apparatus, the transmitting oscillator is stabilized in frequency by association with a standard oscillator, a discriminator and a frequency-controlling device ; and during reception, the transmitting oscillator is associated with the standard oscillator to produce a resultant oscillation for mixing with the received waves to produce an intermediate frequency which, when varied from its normal value, exerts a correcting action on the transmitting oscillator. As shown in the drawing, applied to a frequency-modulated system, the transmitting oscillator O1 is modulated by the signal AF in the reactance valve CV, and is multiplied in frequency at M1 before passing to an amplifier A1 and aerial AT. A standard oscillator 02 feeds a multiplier or harmonic selector M2 the output of which is combined in a frequency changer FCl with the output of the oscillator O1. When the switch S is on the transmitting contact T, the difference frequency from FC1 is fed to an amplifier IFA and to a limiter discriminator DL, which supplies a correcting voltage to the reactance valve CV should the oscillator O1 depart from normal. During reception, the multiplied frequency from O1 and M1 is mixed in the frequency-changer FC2 with the multiplied frequency from 02 and M2 and a resultant frequency is mixed in the frequency-changer FC3 with the received wave from AR. The beat passes through the switch S and amplifier IFA to the discriminator DL, and any drift in the incoming frequency is compensated by applying the D.C. component of its output to the reactance valve CV to shift the frequency of the source O1, whilst the A.C. component passes to the signal receiver af. The above arrangement is only applicable to systems using a single operating frequency, but in a modified arrangement, Fig. 2 (not shown) provision is made for the use of any selected frequency within a wide band. Specication 551,472 is referred to.
GB16450/43A 1943-10-07 1943-10-07 Improvements in frequency controlling and stabilising means in radio-apparatus and the like Expired GB579567A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB16450/43A GB579567A (en) 1943-10-07 1943-10-07 Improvements in frequency controlling and stabilising means in radio-apparatus and the like
US579994A US2460781A (en) 1943-10-07 1945-02-27 Circuit for stabilizing frequencies of transmitter-receiver systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB16450/43A GB579567A (en) 1943-10-07 1943-10-07 Improvements in frequency controlling and stabilising means in radio-apparatus and the like

Publications (1)

Publication Number Publication Date
GB579567A true GB579567A (en) 1946-08-08

Family

ID=10077533

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16450/43A Expired GB579567A (en) 1943-10-07 1943-10-07 Improvements in frequency controlling and stabilising means in radio-apparatus and the like

Country Status (2)

Country Link
US (1) US2460781A (en)
GB (1) GB579567A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2505670A (en) * 1947-11-28 1950-04-25 Raytheon Mfg Co Transceiver for multichannel radio communication systems
US2618744A (en) * 1949-04-30 1952-11-18 Rca Corp Frequency modulation radar systems with directional couplers or the like
US2653315A (en) * 1951-02-20 1953-09-22 Rca Corp Frequency control system for microwave relay terminal stations
NL83989C (en) * 1951-09-27
DE1271787B (en) * 1962-05-25 1968-07-04 Siemens Ag Relay amplifier for a radio link
US3230453A (en) * 1962-06-12 1966-01-18 Radiation Inc System for maintaining fixed phase between a pair of remotely located stations
US3518546A (en) * 1966-12-12 1970-06-30 Microlab Fxr Harmonic communication and navigation system
US3916412A (en) * 1974-08-29 1975-10-28 United Technologies Corp Frequency stabilized single oscillator transceivers
US3925729A (en) * 1974-08-29 1975-12-09 United Technologies Corp Skirt-tuned single oscillator transceiver
US4411018A (en) * 1981-10-20 1983-10-18 United Technologies Corporation Rapidly stabilized Gunn oscillator transceiver

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE473378A (en) * 1940-01-12
CA411423A (en) * 1940-01-27 1943-03-30 M. Deerhake Franklin Frequency conversion system
GB551472A (en) * 1941-08-20 1943-02-24 James White Dalgleish Improvements in modulated high frequency carrier wave signalling systems
US2317547A (en) * 1941-09-06 1943-04-27 Don C Mcrae Communication system
US2333719A (en) * 1942-02-28 1943-11-09 Rca Corp Two-way radio communication system
US2380288A (en) * 1942-04-27 1945-07-10 Bligh Norman Richard Multichannel radio signaling system
US2407212A (en) * 1942-06-16 1946-09-03 Rca Corp Radio relaying
US2363835A (en) * 1943-04-01 1944-11-28 Gen Electric Frequency conversion
US2408826A (en) * 1943-06-21 1946-10-08 Galvin Mfg Corp Combined frequency modulation radio transmitter and receiver
US2408791A (en) * 1943-06-21 1946-10-08 Galvin Mfg Corp Radio communication system
US2379395A (en) * 1944-05-05 1945-06-26 Hartford Nat Bank & Trust Co Fm transceiver

Also Published As

Publication number Publication date
US2460781A (en) 1949-02-01

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