Design and construction Wireless communication systems 23 Antennas (Electronics) 6 Equipment and supplies 5 Wireless LANs 4 Frequency synthesizers 3 Metal oxide semiconductors, Complementary 3 Signal processing 3 Amplifiers, Radio frequency 2 Data processing 2 IEEE 802.11 (Standard) 2 Mobile communication systems 2 Mobile computing 2 Portable computers 2 Wireless metropolitan area networks 2 Access control 1 Ad hoc networks (Computer networks) 1 Artificial satellites in navigation 1 Automatic tracking 1 Body area networks (Electronics) 1 Broadband amplifiers 1 Broadband communication systems 1 Cache memory 1 Cell phones 1 Computer networks 1 Digital techniques 1 Electronic noise 1 Human-computer interaction 1 IEEE 802.16 (Standard) 1 Local area networks (Computer networks) 1