|국가/구분||United States(US) Patent 등록|
|국제특허분류(IPC7판)||F41G-007/00 H01Q-001/28 G01S-013/00|
|미국특허분류(USC)||24/400.314 ; 34/370.8 ; 34/375.6 ; 34/206.2|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 4 인용 특허 : 7|
Circuitry for adjusting the resonant frequency of an Yttrium-Iron-Garnet (YIG) filter in the first local oscillator of a receiver carried on a guided missile is shown to include the combination of a crystal oscillator which produces a pilot signal for tuning the YIG filter to a corresponding resonant frequency and a frequency adjusting arrangement for offsetting the resonant frequency of the YIG filter by a predetermined amount.
[ What is claimed is:] [1.] In a radar receiver wherein the frequency of the first local oscillator corresponds with the resonant frequency of an Yttrium-Iron-Garnet (YIG) filter, circuitry for adjusting such resonant frequency to a frequency offset by a predetermined amount from the frequency of a control radar, such circuitry comprising:(a) a crystal oscillator for producing a pilot signal at a frequency approximating the frequency of the control radar and applying such pilot signal to the radar receiver;(b) means for detecting the pilot signal to form...