Abstract: A radio frequency (RF) phased array transmitter system comprises a phased array for generating an RF signal. The phased array comprises conductive patches formed in an array, separation gaps, and active sources. Each of the separation gaps is formed between two adjacent ones of the conductive patches, and each of the active sources is formed across its associated one of the separation gaps. The system further comprises an optical source for generating an optical signal and an RF source for generating an RF signal. In addition, the system comprises an optical modulator coupled to the optical source and the RF source. The optical modulator receives an optical signal and an RF signal, and produces an RF modulated optical signal based on the received optical signal and the received RF signal.

Abstract: A radio frequency signal receiver having a plurality of serially coupled frequency converter stages adapted to convert the frequency of a signal having a frequency within a first predetermined band of frequencies to a frequency within a second, smaller predetermined band of frequencies. Each one of the frequency converter stages includes a plurality of bandpass filters, each one thereof being adapted to pass signals within a different portion of a predetermined band of frequencies, and heterodyning means for converting the frequency of a signal passed by any one of the plurality of bandpass filters to a frequency within a smaller predetermined band of frequencies.