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NJS4310D is designed for the front end of radar system. It features a small size and a light weight operable at any frequency between 3.02GHz and 3.08GHz This front end module consists of GaAs FET 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.
| Feature / Category | System Specification |
| Primary Function | S-Band Marine Radar Front-End Module |
| RF Operating Frequency | 3.02 GHz to 3.08 GHz |
| IF (Intermediate Frequency) | 60 MHz (Typical) |
| Noise Figure (NF) | 3.0 dB Max (Delivers clear tracking in heavy sea/rain clutter) |
| Conversion Gain | 6.0 dB Min (8.0 dB Typical) |
| Waveguide Interface | WR284 (Standard S-band physical flange sizing) |
| Operating Voltage | +12.0V DC Nominal ($\pm$0.2V variance allowed) |
| VCO Tuning Voltage | +4.0V DC (yields ~3.05 GHz) to +24.0V DC (yields ~3.17 GHz) |
| Current Consumption | 75 mA Typical / 100 mA Maximum |
| RF Pulse Burnout Protection | Single Pulse: 600 mW ($P_d=10\text{ns}$) | Repetitive: 400 mW ($$P_d=1\mu\text{s$, Duty=0.001) |
| Physical Weight | 0.62 kg (approx. 1.37 lbs) |
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