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GB1095842A - Improvements in radars with pulse compression - Google Patents

Improvements in radars with pulse compression

Info

Publication number
GB1095842A
GB1095842A GB5145864A GB5145864A GB1095842A GB 1095842 A GB1095842 A GB 1095842A GB 5145864 A GB5145864 A GB 5145864A GB 5145864 A GB5145864 A GB 5145864A GB 1095842 A GB1095842 A GB 1095842A
Authority
GB
United Kingdom
Prior art keywords
pulse
duration
sub
supplementary
frequency
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
GB5145864A
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.)
CIE FRANCAISE THOMSON IIOUSTON
Original Assignee
CIE FRANCAISE THOMSON IIOUSTON
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 CIE FRANCAISE THOMSON IIOUSTON filed Critical CIE FRANCAISE THOMSON IIOUSTON
Publication of GB1095842A publication Critical patent/GB1095842A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01S13/08—Systems for measuring distance only
    • G01S13/10—Systems for measuring distance only using transmission of interrupted, pulse modulated waves
    • G01S13/26—Systems for measuring distance only using transmission of interrupted, pulse modulated waves wherein the transmitted pulses use a frequency- or phase-modulated carrier wave
    • G01S13/28—Systems for measuring distance only using transmission of interrupted, pulse modulated waves wherein the transmitted pulses use a frequency- or phase-modulated carrier wave with time compression of received pulses
    • G01S13/282—Systems for measuring distance only using transmission of interrupted, pulse modulated waves wherein the transmitted pulses use a frequency- or phase-modulated carrier wave with time compression of received pulses using a frequency modulated carrier wave
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/01—Shaping pulses
    • H03K5/04—Shaping pulses by increasing duration; by decreasing duration
    • H03K5/06—Shaping pulses by increasing duration; by decreasing duration by the use of delay lines or other analogue delay elements
    • H03K5/065—Shaping pulses by increasing duration; by decreasing duration by the use of delay lines or other analogue delay elements using dispersive delay lines

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

1,095,842. Pulse radar. COMPAGNIE FRANCAISE THOMSON HOUSTONHOTCHKISS BRANDT. Dec. 17, 1964 [Dec. 17, 1963], No. 51458/64. Heading H4D. In a pulse compression radar wherein the transmitter produces a radio frequency pulse of constant amplitude and relatively long duration # which is linearly modulated in frequency as a function of time with a deviation much greater than 1/# and equal to 1/ #2 , where # 2 is the duration of the compressed pulse, a supplementary modulation is added within duration T by a modulating signal of which a parameter is caused to vary as a function of time and the transmitter output signal is fed to a filter of bandwidth 1/# 2 or the receiver incorporates such a filter. The modulating signal may include a train of sub-pulses of variable duty factor (by variation of sub-pulse duration, by variation of sub-pulse repetition rate, or by both) or may produce a supplementary frequency modulation at a rate of the order of 1/# 2 and of variable index. It is stated that the time side-lobes in the compressed pulse are reduced and that the effects of Doppler frequency shifts are compensated. With a supplementary frequency modulation, Fig. 5c, the rate is greater than 1/# 2 and the index is a minimum at the ends of the long pulse. The transmitter may utilize klystrons and a gain-controlled amplifier.
GB5145864A 1963-12-17 1964-12-17 Improvements in radars with pulse compression Expired GB1095842A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR957402A FR1387285A (en) 1963-12-17 1963-12-17 Pulse Compression Radar Improvements

Publications (1)

Publication Number Publication Date
GB1095842A true GB1095842A (en) 1967-12-20

Family

ID=8818995

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5145864A Expired GB1095842A (en) 1963-12-17 1964-12-17 Improvements in radars with pulse compression

Country Status (2)

Country Link
FR (1) FR1387285A (en)
GB (1) GB1095842A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4161732A (en) * 1976-11-12 1979-07-17 Westinghouse Electric Corp. Gated pulse compression radar
US4626855A (en) * 1980-09-27 1986-12-02 The Marconi Company Limited Radar, sonar and similar systems

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4161732A (en) * 1976-11-12 1979-07-17 Westinghouse Electric Corp. Gated pulse compression radar
US4626855A (en) * 1980-09-27 1986-12-02 The Marconi Company Limited Radar, sonar and similar systems

Also Published As

Publication number Publication date
FR1387285A (en) 1965-01-29

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