Microwaves 82 Microwaves, RF and Optical Engineering 82 Optical engineering 82 Electrical engineering 40 Communications Engineering, Networks 37 Image processing 19 Signal processing 19 more ... Signal, Image and Speech Processing 19 Speech processing systems 19 Electronic circuits 18 Electronics 18 Electronics and Microelectronics, Instrumentation 18 Microelectronics 18 Circuits and Systems 17 Lasers 14 Optics, Lasers, Photonics, Optical Devices 14 Photonics 14 Electronic materials 13 Optical and Electronic Materials 13 Optical materials 13 Computer Communication Networks 10 Computer communication systems 10 Electrical Engineering 8 Classical Electrodynamics 6 Electrodynamics 6 Optics 6 Control engineering 5 Magnetic materials 5 Magnetism 5 Magnetism, Magnetic Materials 5 less ...