Wide-band 2–18 GHz receiver front end with input limiter, switch, three LNA stages, switched 25 dB attenuator and equalizer.
| Overview | |
|---|---|
| Frequency range | 2 – 18 GHz |
| Signal chain | Input limiter, switch, LNA, switched attenuator, LNA, equalizer, LNA |
| Input / output impedance | 50 Ω |
| Electrical Specifications | |
| Gain over frequency | 39 dB @ 18 GHz; 31 dB @ 2 GHz |
| Noise figure | 6 dB max @ 2 GHz; 5 dB max @ 18 GHz |
| VSWR (in / out) | 2:1 typ; 2.2:1 max |
| Equalizer | 1 dB max @ 18 GHz; 3 dB max @ 2 GHz |
| Gain variation over temperature | ±1 dB (±0.5 dB design goal) |
| Gain matching between units | ±0.5 dB (per 8 units) |
| Attenuator mode | 25 dB ±1 dB below the main channel |
| Gain variation between main and BIT channel | ±0.75 dB |
| Input P1dB | With attenuator: -2 dBm; without attenuator: -12 dBm @ 18 GHz, -5 dBm @ 2 GHz |
| Input Limiter | |
| Pulse power handling | 100 W min (pulse width 1 µs max, duty cycle 0.1% max) |
| CW power handling | 1 W |
| Recovery time | 50 ns |
| Limiting threshold | +7 dBm min |
| Leakage power | +20 dBm max |
| Switching & Filtering | |
| Switch isolation | > 60 dB |
| Switch termination | Non-reflective |
| Switching time | 200 ns max |
| Video leakage at module output | < -73 dBm for frequency components above 1.5 GHz |
| Switch PRF | 0.1 MHz max |
| High-pass filter | Pass band 2 – 18 GHz; rejection > 40 dB min at DC – 1.5 GHz |
| Control & Power | |
| Control | 4 TTL lines (E1–E4): “0” (low) = closed / low loss, “1” (high) = open / isolated |
| Path selection | E1 = 0: BIT input; E2 = 0: main input (J1); E3 = 0: 25 dB attenuator on; all lines = 1: all off |
| Power consumption | 4.5 W max |
| Supply voltage options | +5 V, +8 V, +10 V, -5 V, -12 V |
| Supply ripple | 200 mV p-p max (50 Hz to 200 MHz) |
| Protection | Over-current (+20%), over-voltage (+20%), under-voltage, reverse polarity |
| Environmental | |
| Operating temperature | 0°C to +50°C |
| Storage temperature | -30°C to +70°C |
| Shock | 22 g half-sine, 20 ms (functional); 40 g half-sine, 20 ms (crash hazard) |
| Humidity | 95% RH (operating) |
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