HASThighly-accelerated life testThe "pressure cooker" of qual tests!
HHenryA unit of inductance, named after a dead American, Joseph Henry.
HBharmonic balanceA method of analyzing circuits with non-linear behavior.
HBThetero-junction bi-polar transistorA good competitor to pHEMT, and requires only one power supply polarity.
HDPEhigh density poly-etheleneAlso known as PEHD in countries such as France, HDPE is number 2 in the recycling categories. Chances are your milk jug is made of it. It is also a useful dielectric, with DK of 2.3 and DF of 0.003.
HEMThigh electron mobility transistorDeveloped in the 1990s, provides better microwave performance compared to MESFETs.
HEPAhigh efficiency particulate air (filter)The type of filters used to filter out particles down to 0.3 micron in a clean room.
HEXFEThexagonal field-effect transistorA trademark of International Rectifier for their MOSFET line.
HFETheterostructure field-effect transistor--
HFSSHigh-Frequency Structural SimulatorAnsoft's 3D EM simulation tool.
HPAhigh-power amplifier--
HPIBHewlett Packard instrument busToo late to rename it "Agilent instrument bus"
HPFhigh pass filterA two-port network that rejects signals below a certain frequency band.
HPINhorizontal PIN diode--
HPBWhalf-power beamwidthUsed to describe an antenna pattern.
HPMhigh-power microwaveGenerally refers to a source module that is a combination of a solid-state driver circuit and a TWT.
H-POLhorizontal polarization--
HSMhigh-side mixingRefers to the condition that the LO frequency is above the RF frequency.
HTCChigh-temperature co-fired ceramicA method of fabricating circuit traces embedded in ceramic.
HTShigh-temperature superconductor--
HZHertzUnit of cycles-per-second, named after a dead German. Not to be confused with the dead Austrian who started that rental car company.
Author: Unknown Editor