Design and construction Wireless communication systems Antennas (Electronics) 6 Equipment and supplies 4 Wireless LANs 4 Frequency synthesizers 3 Metal oxide semiconductors, Complementary 3 Signal processing 3 Amplifiers, Radio frequency 2 IEEE 802.11 (Standard) 2 Mobile computing 2 Wireless metropolitan area networks 2 Access control 1 Ad hoc networks (Computer networks) 1 Artificial satellites in navigation 1 Automatic tracking 1 Broadband amplifiers 1 Cell phones 1 Data processing 1 Digital techniques 1 Electronic noise 1 Local area networks (Computer networks) 1 Location-based services 1 Low voltage integrated circuits 1 Management 1 Mobile communication systems 1 Noise pollution 1 Online library catalogs 1 Oscillators, Microwave 1 Portable computers 1