1. Integrated 6-bit photonic true-time delay unit for lightweight 3–6GHz radar beamformer;Ackerman;IEEE Int. Microwave Symp. Digest,1992
2. Programmable fiber optic delay line;Ball;IEEE Photonics Technol. Lett.,1994
3. Ultra-wideband microwave beamforming technique;Cardone;Microwave J.,1985
4. Optically controlled serially fed phased array transmitter;Chang;IEEE Microwave Guided Wave Lett,1997