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January 24, 2017
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Microwave Acronyms - I

IC integrated circuit  
ICD interconnect diagram A type of block diagram.
ICP Insane Clown Posse.
No, just kidding, inductively-coupled plasma
A musical group that you don't want your daughter to be a groupy for? actually, a great way to etch via holes in GaAs substrates.
ID inside diameter The inside dimension of a cylinder.
IDS drain-source current The channel current in an FET.
IDSS saturated drain source current logical people think this should be abbreviated"SDSC"
IEC an international standards group  
IEEE Institute of Electrical and Electronics Engineers The subgroup MTT-S hosts an annual gathering of all things microwaves, publishes a lot of excellent but often hard-to-read microwave-related papers, and is helping to review some of our MW101 articles. 
IF intermediate frequency The output frequency of a down converter.
IIP2, IIP3 input third order intercept point The intercept points, referenced to the input.
IL insertion loss  
ILFD injection locked frequency divider  
IMAX maximum current for a FET Maximum FET channel current,typically measured at +0.5 volts VGS and +1 volt VDS.
IM intermodulation  
IMD intermodulation distortion Often refers to "TOI".
IMN input matching network, inter-stage matching network  
IMP intermodulation products  
IMR intermodulation ratio The difference in magnitude of observed during two-tone IMD measurements.
IMPATT impact avalanche and transit time A nearly forgotten diode technology that offered great promise for supplying high power at millimeter wavelengths.
InP indium phosphide A III-V compound semiconductor suitable for frequencies up to and beyond 100 GHz.
IIP3 input third order intercept point Same as ITOI.
I/O input/output  
IP intellectual property What you try to protect with a patent.
IP2 second order intercept point  
IP3 third order intercept point  
I/Q in-phase/quadrature As in "I/Q modulator", not the intelligence quotient of your colleagues.
IRM image reject mixer A mixer that removes the image frequency contribution from the IF.
ISV individual source vias The best possible grounding scheme for power FETs, usually required 2-mil substrates.
ITAR international traffic in arms regulations A set of regulations in the United States that controls the export of data that is critical to military programs.
ITOI input third order intercept Same as IIP3.
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