- pulse envelop
- pulse generation
- pulse interval
- pulse method
- pulse modulation
- pulse phase
- pulse profile
- pulse rate
- pulse regenerator
- pulse sequence
- pulse spacing
- pulse stagger
- pulse tilt
- pulse-modulated
- pulsed interference
- pulsed maser
- pulsed mode
- pulsed oscillator
- punch hole
- purchase value
- pushup list
- put through
- Q channel
- Q switching
- quadrature carrier
- quadrature modulation
- quadrature signal
- quadripod
- quadruple diversity
- qualification required
- quantization noise
- queue message
- queue scanner
- queuing device
- queuing time
- pyramidal horn
- quad helices
- quadrantal angle
- quadrature distortion
- quadrature phase
- qualification
- quantization interval
- quantum device
- quantum limit
- quantum plasma
- quasi-peak
- quick reference
- R-wire
- raceway
- racon
- radar altimetry
- radar antenna
- radar astronomy
- radar camouflage
- radar cell
- radar equation
- radar interference
- radar picket
- radar reflectivity
- radar resolution
- radar target
- radar tracking
- radar transmitter
- radar tube
- radar-map
- radargraphy
- radial
- radial transfer
- radial web
- radiated field
- radiated time
- radiated wave
- radiating cable
- radiating system
- radiation association
- radiation balance
- radiation belt
- radiation characteristics
- radiation coupling
- radiation hardness
- radiation losses
- radiation resistance
- radiation rocket
- radiation shield
- radiator
- radio
- radio altimeter
- radio amateur
- radio bearing
- radio blackout
- radio buoy
- radio button
- radio channel
- radio command
- radio contact
- radio detector
- radio emission
- radio energy
- radio homing
- radio horizon