- harmonic analyser
- harmonic antenna
- harmonic attenuation
- harmonic bands
- harmonic components
- harmonic content
- harmonic frequency
- harmonic interference
- harmonic mixer
- harmonic order
- harmonic rejection
- harmonic separation
- hash total
- head assembly
- head compartment
- head slot
- head unit
- header record
- heat rejection
- heat shield
- hazard rate
- head switch
- header byte
- header card
- Header Extension
- header field
- header message
- header segment
- heading
- heading code
- heading frame
- hearing device
- heat balance
- heat barrier
- heat cap
- heat coil
- heating load
- heavy-duty
- heliacal antenna
- helical antenna
- helical filter
- helical scanning
- height control
- helical heater
- helix antenna
- helix waveguide
- hemispherical coverage
- heptode
- hertz antenna
- hertzian wave
- heterodyne repeater
- heterodyne technique
- heterodyne whistle
- heterogeneous orbit
- heterojunction FET
- HF signal
- hetero-sphere
- heterodyne beat
- heterodyne receiver
- heterodyne reception
- HF spectrum
- hidden field
- hierarchical level
- hierarchical network
- high loss
- highspeed skip
- hoghorn antenna
- Hohmann orbit
- hold control
- high performance
- highway
- holder
- holding signal
- high correlation
- high impedance
- highlight
- hold acknowledge
- hold circuit
- hold latch
- holding time
- hole pattern
- hollow dipole
- hologram
- homo-sphere
- homogeneous cladding
- homogeneous grading
- homogeneous orbit
- horizon scanner
- horizontal amplifier
- horizontal format
- host exchange
- home loop
- home receiver
- home telephone
- home window
- homing antenna
- homing head
- homocentric beam
- homodyne oscillator
- homology theory