RWR

Man Portable Radar Warning Receiver For Covert and U.A.V. Applications Figure 1 RWR Unit Introduction The unit is designed for Radar Warning Receiver (RWR) applications where small size and low power consumption are of prime importance, with filtering, amplification, detection and frequency measurement being combined into one multi-function unit. Figure 2 shows a block diagram of the RWR and its three integral RF modules. Two amplitude measurement channels allow direction finding by amplitude comparison between adjacent antennas. One of these channels is also used in standby mode for detecting the presence of signals by polling round the antennas. A two-tier discriminator, fed from one of the amplitude channels via an SPDT switch, performs frequency measurement. Frequency resolution is nominally 160 MHz over an 8 to 18 GHz band. Linear Amplifier N S Video Output Limiting Amplifier Trigger Inputs E DLVA W Bandpass Filter Video Output IFM Digital Data Out Figure 2: Radar Warning Receiver Block Diagram Filtronic Components Ltd., Airedale House, Royal London Industrial Estate, Acorn Park, Shipley, West Yorkshire, BD17 7SW, United Kingdom. Tel: +44 (1274) 531602 Fax:+44 (1274) 539724 Email: sales@fcl.com Page 1 of 1 Man Portable Radar Warning Receiver Electrical Specifications Operating temperature range 0ºC to 70ºC Characterised at 25ºC. Table 1: Electrical Specifications Parameter Operating Frequency Operating Dynamic Range Frequency Measurement Resolution Frequency Measurement Accuracy Minimum Pulse Width Triggering Trigger to Data Delay Out of Band Rejection Tangential Signal Sensitivity (8 dB Video SNR) Logging Range Frequency Flatness (Video) Amplitude Tracking (Between any Two Modules at the Same Frequency and Temperature) Video Rise Time Video Output Slope Logging Linearity Video Coupling Maximum Duty Cycle RF Input Switch Isolation RF Input Switch Speed RF Input Switch Control Insertion Gain RF Input to RF Output Insertion Ripple Input Return Loss Power Supply Current (operating - no rf) Power Supply Current (standby) Power-up Time (standby to on) Power-up Time (cold start) Dimensions W eight 2 Microwave Input Connector 1 2 not including amplitude module gain plus 10 grams for the interconnect module Amplitude Module 8 to 18 GHz -73 to 0dBm d.c. to 7 GHz > 60 dB 20 to 26 GHz > 30 dB -73 dBm -70 to -30 dBm ±2.5 dB ±1 dB Typical 30ns Typ 70 ns Max 50 mV/dB ±1 dB Active d.c. restored 50 % >30 dB Typ