What is a vector modulator?
new AD8340 and AD8341 vector modulators are single- chip RFICs that enable manufacturers of high power amplifiers and radio transceivers for cel- lular base station equip- ment to adjust both amplitude and phase of their RF carriers.
What is meant by phase shifters?
Phase Shifters are a critical component in many RF and Microwave systems. Applications include controlling the relative phase of each element in a phase array antenna in a RADAR or steerable communications link and in cancelation loops used in high linearity amplifiers.
What is phase shifter in microwave?
Microwave phase shifters are devices that alter the phase of the electromagnetic oscillations at the output of a microwave transmission line, with respect to the phase of the oscillations at the input of the line.
What is SVM in power electronics?
Space vector modulation (SVM) is an algorithm for the control of pulse-width modulation (PWM). It is used for the creation of alternating current (AC) waveforms; most commonly to drive 3 phase AC powered motors at varying speeds from DC using multiple class-D amplifiers.
What is space vector modulation technique?
Space Vector Modulation is a modulation technique that calculates duty cycles of switches to synthesize a desired output voltage on average, without the use of a carrier waveform.
What is the importance of phase shift?
It affords the ability to measure anywhere along the horizontal zero axis in which each wave passes with the same slope direction, either negative or positive. This is important because it affords the ability to describe the relationship between a voltage and a current sine wave within the same circuit.
What is a waveguide phase shifter?
Waveguide Phase Shifters: A phase shifter is a two-port component that provides a fixed or variable change in the phase of the traveling wave. An ideal phase shifter is lossless and matched. It only shifts the phase of the output wave. Example: Phase shifters are used in phased antenna arrays.
What is phase control module?
A phase shift module is a microwave network module which provides a controllable phase shift of the RF signal. Phase shifters are used in phased arrays.
Why is space vector modulation used?
What is the advantage of space vector modulation?
Space vector modulation technique has advantage of an optimal output and also reduces harmonic content of the output voltage/current [4]. Space vector PWM (SVPWM) has the advantages of lower harmonics. of Vt. Amplitude is controlled by the peak of Va.
What is meant by phase shift oscillator?
A phase-shift oscillator is a linear electronic oscillator circuit that produces a sine wave output. It consists of an inverting amplifier element such as a transistor or op amp with its output fed back to its input through a phase-shift network consisting of resistors and capacitors in a ladder network.
What is ferrite phase shifter?
Rotary Field Ferrite Phase Shifter The twin toroid is a latching, nonreciprocal device; the dual-mode is a latching, reciprocal device and the rotary-field is a non-latching reciprocal device. All are constructed from ferrite materials which have a square hysteresis loop.