JPS5480694A - Frequency agile unit - Google Patents

Frequency agile unit

Info

Publication number
JPS5480694A
JPS5480694A JP14832477A JP14832477A JPS5480694A JP S5480694 A JPS5480694 A JP S5480694A JP 14832477 A JP14832477 A JP 14832477A JP 14832477 A JP14832477 A JP 14832477A JP S5480694 A JPS5480694 A JP S5480694A
Authority
JP
Japan
Prior art keywords
frequency
circuit
demultiplication
locked loop
local signal
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.)
Pending
Application number
JP14832477A
Other languages
Japanese (ja)
Inventor
Naoyuki Minami
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP14832477A priority Critical patent/JPS5480694A/en
Publication of JPS5480694A publication Critical patent/JPS5480694A/en
Pending 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
    • G01S13/24—Systems for measuring distance only using transmission of interrupted, pulse modulated waves using frequency agility of carrier wave

Landscapes

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

Abstract

PURPOSE:To enable to select arbitrarily and momentarily by using digital phase locked loop DPLL, in the frequency agile system in which the transmission and reception frequency of the coherent pulse radar is controlled for the random selection within a given frequency range every radar period. CONSTITUTION:The local signal generating circuit 10 provides the voltage controlled frequency oscillator 20 generating local signal, programmable variable frequency demultiplication circuit 29 inputting the oscillated frequency and outputting after demultiplication in the designated frequency dividing ratio, frequency selection and control circuit 32 designating the said frequency dividing ratio according to the specified program or at random, and the phase locked loop detecting the phase difference to the reference frequency of the output of the programmable variable frequency dividing circuit 29 and feedback-controlling the voltage controlled frequency oscillator 20.
JP14832477A 1977-12-09 1977-12-09 Frequency agile unit Pending JPS5480694A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14832477A JPS5480694A (en) 1977-12-09 1977-12-09 Frequency agile unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14832477A JPS5480694A (en) 1977-12-09 1977-12-09 Frequency agile unit

Publications (1)

Publication Number Publication Date
JPS5480694A true JPS5480694A (en) 1979-06-27

Family

ID=15450226

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14832477A Pending JPS5480694A (en) 1977-12-09 1977-12-09 Frequency agile unit

Country Status (1)

Country Link
JP (1) JPS5480694A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02216079A (en) * 1989-02-15 1990-08-28 Nec Corp Frequency switching type strategic navigation system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02216079A (en) * 1989-02-15 1990-08-28 Nec Corp Frequency switching type strategic navigation system

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