GB1398318A - Radio signal receivers - Google Patents

Radio signal receivers

Info

Publication number
GB1398318A
GB1398318A GB4381072A GB4381072A GB1398318A GB 1398318 A GB1398318 A GB 1398318A GB 4381072 A GB4381072 A GB 4381072A GB 4381072 A GB4381072 A GB 4381072A GB 1398318 A GB1398318 A GB 1398318A
Authority
GB
United Kingdom
Prior art keywords
amplifier
diodes
voltage
output
channels
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
GB4381072A
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.)
Thales SA
Original Assignee
Dassault Electronique SA
Electronique Marcal Dassault SA
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 Dassault Electronique SA, Electronique Marcal Dassault SA filed Critical Dassault Electronique SA
Publication of GB1398318A publication Critical patent/GB1398318A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver
    • H03G3/3073—Circuits generating control signals when no carrier is present, or in SSB, CW or pulse receivers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/42—Simultaneous measurement of distance and other co-ordinates
    • G01S13/44—Monopulse radar, i.e. simultaneous lobing
    • G01S13/4436—Monopulse radar, i.e. simultaneous lobing with means specially adapted to maintain the same processing characteristics between the monopulse signals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/28—Details of pulse systems
    • G01S7/285—Receivers
    • G01S7/34—Gain of receiver varied automatically during pulse-recurrence period, e.g. anti-clutter gain control
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
    • H03G1/0035—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements
    • H03G1/0052—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements using diodes
    • H03G1/0058—PIN-diodes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Circuits Of Receivers In General (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)

Abstract

1398318 Automatic gain control; monopulse radar ELECTRONIQUE MARCEL DASSAULT SA 21 Sept 1972 [24 Sept 1971] 43810/72 Headings H4R and H4D An agc. for an amplifier includes a pair of P-I-N diodes associated with the amplifier which are arranged such that the attenuation in decibels introduced in the amplifier by the diodes varies linearly as a function of the output voltage of said amplifier. The invention is described as applied to a monopulse radar receiver (Fig. 1) which, as is known, comprises three amplification channels, a channel 12 for receiving a sum signal # of the signals transmitted by an associated monopulse radar antenna, and channels 9 and 10 for receiving the difference signals #X and #Y respectively corresponding to the components of the azimuther elevation # of the direction of the echo with respect to the direction of the radio axis of the radar antenna. There is coupled to the output of the I.F. amplifier 13 in one of the channels an age. arrangement which is coupled to the amplifiers 13, 43, 44 in all three channels so that their gains are varied equally in dependence on the output voltage of the one channel, thereby sensing that the gains of all three channels remain equal to one another at all times. The age. arrangement includes an amplifier filter 16 which derives a voltage u, from the I.F. amplifier output, which is proportional to the amplifier voltage output. This voltage u is used to drive two function generators 21, 22 which produce voltage outputs V, V<SP>1</SP> where V=f(u) and V<SP>1</SP>=f<SP>1</SP>(u) the forms of V and V<SP>1</SP> as a function of u being illustrated in Figs. 4 and 5 (not shown). The voltages V, V<SP>1</SP> are then used to control current generators 28, 37 associated with P-I-N diodes connected to amplifier 13 and current generators associated with P-I-N diodes connected to amplifiers 43 and 44. Fig. 3 shows the arrangement associated with amplifier 13 which is a two stage amplifier comprising integrated circuit amplifier stages 53 and 62. The first current generator 28 driven by voltage V feeds current to P-I-N- diodes 32 and 33 connected at the inputs of respective amplifier stages 53 and 62 and current generator likewise feeds currents to P-I-N diodes 41 and 42 associated with the output circuitry of the respective stages. Identical arrangements are used for the amplifiers 43, 44. The form of the functions f(u) and f<SP>1</SP>(u) are chosen to give the required relationship between output voltage and the attenuation in decibels introduced, by taking into account the known characteristics of P-I-N diodes.
GB4381072A 1971-09-24 1972-09-21 Radio signal receivers Expired GB1398318A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7134376A FR2153194B1 (en) 1971-09-24 1971-09-24

Publications (1)

Publication Number Publication Date
GB1398318A true GB1398318A (en) 1975-06-18

Family

ID=9083420

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4381072A Expired GB1398318A (en) 1971-09-24 1972-09-21 Radio signal receivers

Country Status (13)

Country Link
JP (1) JPS4857591A (en)
AU (1) AU473578B2 (en)
BE (1) BE789148A (en)
CH (1) CH563688A5 (en)
DE (1) DE2246757A1 (en)
ES (1) ES406985A1 (en)
FR (1) FR2153194B1 (en)
GB (1) GB1398318A (en)
IT (1) IT967794B (en)
NL (1) NL7212923A (en)
NO (1) NO132975C (en)
SE (1) SE373955B (en)
ZA (1) ZA726438B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4677392A (en) * 1985-12-16 1987-06-30 Hughes Aircraft Company Cascaded internal impedance dependent amplifier with accurate variable gain control

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3378843A (en) * 1966-11-29 1968-04-16 Rca Corp Monopulse tracking radar system capable of locating a plurality of unresolved targets

Also Published As

Publication number Publication date
NL7212923A (en) 1973-03-27
FR2153194B1 (en) 1976-09-03
NO132975B (en) 1975-11-03
NO132975C (en) 1976-02-11
FR2153194A1 (en) 1973-05-04
IT967794B (en) 1974-03-11
CH563688A5 (en) 1975-06-30
DE2246757A1 (en) 1973-03-29
JPS4857591A (en) 1973-08-13
ZA726438B (en) 1973-06-27
BE789148A (en) 1973-01-15
AU4703772A (en) 1974-04-11
AU473578B2 (en) 1976-06-24
ES406985A1 (en) 1975-09-16
SE373955B (en) 1975-02-17

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee