Endwave Defense Systems’ 44 GHz frequency multiplier subsystem is designed for Milstar Satcom uplink applications. The design is a frequency quadrupler (X4), which includes various buffer, driver, and output power amplifier functionality in one integrated module. The multiplier module receives an X-band input signal and multiplies the frequency up to fully cover the unclassified K-band Milstar uplink operating bandwidth.

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Typical performance specifications for the three output power options are as follows: input F_in = X-Band, 11 GHz center frequency; P_in = +14.25 to +18.25 dBm; input VSWR = 2.0-to-1; output F_out = K-band, 44 GHz center frequency; output phase noise degradation: < 13 dB; output VSWR = 2.5-to-1; non-harmonically related spurs = -65 dBc; harmonically related spurs = -25 dBc.

Output power is available as follows: +14 to +18 dBm (-1 model); +16 to +20 dBm (-2 model); +18 to +22 dBm (-3 model); dc power at +5 VDC = 410 mA maximum.

Milstar is a joint service satellite communications system that provides worldwide security, jam resistance and a low probability of detection of nuclear-event resistant communications for all forces across the spectrum of conflict. Each Milstar satellite serves as a switchboard in space, directing traffic from terminal to terminal anywhere on Earth. Milstar provides interoperable communications among users of Army, Navy, and Air Force Milstar terminals.