Power amplifiers Design and construction 4 Amplifiers, Radio frequency 3 Broadband communication systems 2 Microwave amplifiers 2 Wireless communication systems 2 Brillouin scattering 1 Broadband amplifiers 1 Frequency selective surfaces 1 Hybrid integrated circuits 1 Lasers 1 Long-Term Evolution (Telecommunications) 1 Microwave circuits 1 Optical amplifiers 1 Phase distortion (Electronics) 1 Radio frequency 1 Wireless power transmission 1 monolithic microwave 1