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Microwave Acronyms - D

Updated May 3, 2012

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DAC digital to analog convertor  

DAD

not an acronym

The guy who used to fill your gas tank while you were in college studying to be a microwave big shot. Don't wait until father's day to call him.

DAMPS digital advanced mobile phone system  

dB

decibel

Refers to relative RF power levels on a logarithmic scale. Used to express any ratio logarithmically. “I love you 1 dB more than yesterday” means a 20 percent increase.

dBc

dB below carrier

Measurement of how much less power a signal at one frequency has with respect to the signal at the carrier frequency.

dBm

decibel relative to one milliwatt

Log scale that refers to absolute RF power levels. For example, 0 dBm refers to 1 mW, 30 dBm refers to 1 Watt.

DBM

double balanced mixer

One of many cases of acronym reuse!

DBS

direct broadcast satellite

The thing out in space that transmits all of those cartoons to your kids. The link between the satellite and your house is done with microwave signals.

DC

direct current

What Edison incorrectly thought you'd use in your home.

DCS

digital communication system

Analog cell phone standard.

DCXO digitally-compensated crystal oscillator  

DECT

digital enhanced cordless telephone

Digital cordless phone standard.

DF dissipation factor The reciprocal of quality factor (Q) for a capacitor.
DFW dielectrically-filled waveguide See substrate-integrated waveguide (SIW)
DHBT double-heterojunction bipolar transistor  
DLVA detector log video amplifier  
DOE design of experiments A more impressive way of saying, "I tried a lot of sh*t, and this seems to work the best, now pass the donuts"
DPDT double-pole, double throw A pair of SPDT switches that are ganged together (thanks, Micah!)
DPLL digital phase-locked loop  
DPQSK differential quadrature phase shift keying  
DRC design rule checking Software that verifies that you didn't do something really stupid in your layout.
DRO dielectric resonator oscillator  
DSA digital step attenuator  
DSB double sideband A receiver or downconverter that uses both sidebands.
DSBSC double sideband carrier suppression  

DSP

digital signal processor

What the nerds do with your IF output signal.

DSR double-selective recess A highly-repeatable way to make pHEMT gates.
DSS digital satellite system  

DUT

device under test

That thing you just blew up out in the lab.

 


 
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