WMicrowave
WAntenna array
WAttenuator (electronics)
WAZUSA
WBackward-wave oscillator
WCavity magnetron
WCirculator
WCommensurate line circuit
WCoplanar waveguide
WCrossed-field amplifier
WDistributed-element circuit
WDistributed-element filter
WGoubau line
WGunn diode
WGyrotron
WHigh-electron-mobility transistor
WInverted-F antenna
WIsolator (microwave)
WKlystron
WMagic tee
WMaser
WMicrostrip
WMicrostrip antenna
WMicrowave cavity
WMicrowave radiometer
WMicrowave transmission
WMonolithic microwave integrated circuit
WMTT-S Geographic activities
WNegative resistance
WMicrowave oven
WPatch antenna
WPhase shift module
WPlanar transmission line
WPower dividers and directional couplers
WPulse-Doppler radar
WRadar
WRat-race coupler
WRF switch
WSlotted line
WSlow-wave coupler
WSolar sail
WCavity magnetron
WStripline
WSubstrate integrated waveguide
WSusceptor
WSutton tube
WTellurometer
WTraveling-wave tube
WVircator
WWaffle-iron filter
WWaveguide (radio frequency)
WWaveguide filter
WWaveguide flange
WWilkinson power divider
WY-factor
WYIG sphere