An optical adjunct add-on millimeter-wave (MMW) radar is being considered by the army for ranging to incoming reentry vehicles and decoy discrimination because of the long range, limited antenna aperture, and low target cross section, a large transmitted energy is required to achieve acceptable signal-to-noise ratios. Limitations on the peak power achievable at millimeter wavelengths leads to a requirement for a high power MMW pulse compression system capable of pulse compression ratios in excess of 200,000
