An ultrawide-band fiber-optic true time-delay millimeter-wave array transmi
tter is fully characterized and demonstrated in this paper. The beamformer
is based on dispersive-prism optical-delay lines and exhibits squint-free /- 60 degrees steering in azimuth across the entire Ka-band (26.5-40 GHz).
This is believed to be the first fully functioning demonstration of a photo
nically controlled wide-band millimeter-wave transmitter system.