by minicircuitsadmin | Apr 12, 2023 | Amplifiers, Engineering Resources, Filters, Frequency Mixers, Modulators / Demodulators, VCOs
An Introduction to the History, Principles and Applications of AM Radio When you think of advancements in signal modulation, your mental time machine might go back to the turn of the 21st century and LTE which was proposed by NTT DOCOMO as “Super 3G” in early...
by minicircuitsadmin | Nov 30, 2022 | Engineering Resources, Frequency Mixers, Modulators / Demodulators
Radha Setty, Technical Advisor Introduction In superheterodyne receivers and transmitters, frequency mixers perform the vital function of frequency translation. In down-converters, the incoming radio frequency (RF) signal is down-converted to an intermediate frequency...
by minicircuitsadmin | Nov 15, 2015 | Engineering Resources, Modulators / Demodulators
Mini-Circuits offers QPSK (quadrature phase-shift keying) and I&Q modulators from 10% bandwidth to as much as 5:1 octave span. So there’s no longer any need to gather double-balanced mixers and 0° and 90° hybrids to assemble “in-house” QPSK or...
by minicircuitsadmin | Nov 12, 2015 | Engineering Resources, Modulators / Demodulators, Q/A
QPSK Modulators Q: What is the difference between a bi-phase modulator and a quadrature (QPSK) modulator? A. The bi-phase modulator has two phase states, 0° and 180°, modulated by switching polarity of the dc voltage at the control ports. The basic elements in a QPSK...
by minicircuitsadmin | Mar 13, 2015 | Engineering Resources, Modulators / Demodulators, Terms
QPSK Quadrature phase shift keying modulator Quadrature phase-shift-keying (QPSK) modulators are four-port devices with RF-in, RF-out, and two data input ports. A bipolar pulse signal is applied at data ports to produce an RF output signal phase-modulated by 0...
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