Antenna Design with Fiber Optics

Dr. Akhileshwar Kumar is president of AK Electromagnetique, Inc., Quebec, Canada. He earned his Ph.D. at the University of Strathclyde, UK. A senior member of the IEEE, Dr. Kumar has published more than 115 technical papers and is the author of two books from Artech House: Fixed and Mobile Terminal Antennas (1991) and Microwave Cavity Antennas (1989).

• Introduction: Background and History of Optical Fiber Technology. General Performance Considerations. Comparison of Losses. Applications and Reasons. Conclusions. Optical Fiber Types, Fabrication, Radiation, and Reliability: Introduction. Fiber Types. Advantages of Single-Mode Fiber Over Multi-Mode Fiber. Materials in the Fabrication. Fabrication Techniques. Nuclear Radiation Hardened Fibers. Mechanical Reliability and Fatigue for Silica Glass Fiber. Radio Frequency Beamforming/Scanning Techniques: Introduction. Lens-Based Beamforming/Scanning Techniques. Circuit Beamformers. Imaging Reflector Antennas. RF Electronic Beam Steering Techniques for Optical Fibers. References. Acousto-Optics Time-Delays for Phased Array Antennas: Introduction. Background of the Acousto-Optics. Delay Line Concept. Theory of the Delay Line. Time Delays arrangement for Phase Array Antennas. Experimental Results on Delay Lines and Phased Array Antennas. Two-Dimensional Array Antenna Beam Steering. Discussions and Conclusions. References. Optically Controlled Beam Scanning of Active Phased Array Antennas: Introduction. Application of Phase Shifters. Methods of Injection Locking. References. Hardware-Compressive Fiber Optical Delay Line for Steering of Phased Array Antennas: Introduction. Development of Binary Optical Delay Lines. Delay-Compressive Fiber Optical Delay Lines. Binary Fiber Optical Delay Line (BIFODEL) Architecture. Design of a Single BIFODEL Segment. Delay-Compressive Fiber Optic Delay Line. Conclusions. References. Optical Beam Steering of Antenna Array Using Two Lasers: Introduction. Concept of Optically Controlled Array. Pinhole Image Mask. Design of a Fiber-Optic Shutter Switch. Signal-to-Noise Ratio and Laser Output. Radiation Patterns and Reduction in Sidelobe Level. References.