The design and performance of a continuous wave dual-frequency multifunction lidar system is presented. The system is based on the use of the nonlinear dynamics of an optically injected semiconductor laser. Under proper operating conditions, the laser emits a dual-frequency beam with a broadly tunable microwave separation. The two optical lines are coherently locked to each other using an exter...

ii ACKNOWLEDGEMENTS It has been a great privilege to be a graduate student in the Electrical and Computer Engineering department at the Texas Tech University and work closely with my advisor Prof. Dr. Kwong S. Chao. His keen insight into system and integrated circuit design is the key factor in the success of this research. I would also like to thank Prof. Dr. Sunanda Mitra, for her willingness...

Dual-hequency patch antennas may provide an alternative to large-bandwidth planar antennas, in applications in which large bandwidth is really needed for operating at two separate transmitreceive bands. When the two operating frequencies are far apart, a dual-frequency patch structure can be conceived to avoid the use of separate antennas. In this paper, a critical overview of possible solution...