NJT 1959 X-Band Radar Front End NJT1959 is designed for the front end of radar system. It features a small size and a light weight operable at any frequency between 9.345GHz and 9.475GHz This front end module consists of HEMT low noise amplifier. image rejection mixer. local VCO with buffer amplifier. FET monitoring circuit is included to monitor FET drain current. The stability of the local VCO frequency by the input RF power is increased effectively by the buffer amplifier which is located between image rejection mixer and local VCO. The gain compression level of the RF input port is improved. --- ELECTRICAL --- < at 25 °C > Operating Voltage ···················· Operating current ···················· Local frequency VT = 4V ··············· VT = 24V ·············· Noise figure ························· Conversion gain ······················ 1dB Gain compression point(RF Port) ·· Monitor voltage ······················ RF single pulse burnout(Note1) ······· RF repetitive Pulse burnout(Note2) ··· Min Typical 4.8 5.0 9.56 3.5 0 2.0 -3.0 0 50 - Max Unit 5.2 V 80 mA 9.38 GHz GHz 4.0 dB dB dBm mV 600 mW 400 mW Note1, f=9.41GHz Pd10nsec NOte2, f=9.41GHZ Pd=1µs Duty=0.001 --- BLOCK DIAGRAM --- For further information on the use of the front end, please contact New JRC. New JRC reserves the right to change the specification of goods without notice. 95-11 Technical Information NJT1959 X-band Radar Front End (1) Input power level vs. output power level characteristic (P1dB) (dBm) 10 5 fLO=9470 MHz fRF=9410 MHz fIF= 60 MHz OUTPUT POWER 0 -5 -10 -15 -20 -20 -15 -10 -5 INPUT POWER 0 5 10 (dBm) (2) Tuning frequency characteristic LOCAL FREQUENCY (MHz) 9600 9550 9500 9450 9400 9350 0 5 10 15 TUNE VOLTAGE (V) 20 25