Local oscillator arrangement for a monopulse receiver in a semiactive missile guidance system
For use in a radar receiver for a guidance system on board a missile, such receiver is described including an intermediate frequency amplifier and a phase detector for demodulating signals out of such amplifier, an improved local oscillator arrangement comprising: (a) a voltage controlled crystal oscillator for producing an output signal; (b) frequency control means, responsive to the demodulated signals out of the phase detector, for changing the frequency of the output signal of the voltage controlled crystal oscillator; (c) frequency conversion means, responsive to the output signal of the voltage controlled crystal oscillator, for converting such signal into a comb of signals around a harmonic of the output signal of the voltage controlled crystal oscillator; (d) means for selecting one signal in the comb of signals; and (e) means, responsive to the selected signal, for generating the local oscillator signal for the intermediate frequency amplifier.
- Assignee:
- Raytheon Co., Lexington, MA (United States)
- Patent Number(s):
- US 5233351; A
- Application Number:
- PPN: US 7-607989
- OSTI ID:
- 6195078
- Resource Relation:
- Patent File Date: 26 Aug 1975
- Country of Publication:
- United States
- Language:
- English
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