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How does a TRAPATT diode work?
TRAPATT Diode. The full form of TRAPATT diode is TRApped Plasma Avalanche Triggered Transit diode. A microwave generator which operates between hundreds of MHz to GHz. The electrons and holes trapped in low field region behind the zone, are made to fill the depletion region in the diode.
What is meant by IMPATT diode and TRAPATT diode?
trapped plasma avalanche triggered transit
A microwave oscillator device with a similar structure to the IMPATT diode is the TRAPATT diode, which stands for “trapped plasma avalanche triggered transit”. This mode of operation produces relatively high power and efficiency, but at lower frequency than a device operated in IMPATT mode.
What is the principle of IMPATT diode?
IMPATT diode operates in reverse bias. It exhibits a negative resistance region due to the impact of avalanche and transit time effects. The phase difference between voltage and current is 180°. Here 90° phase delay is due to the avalanche effect, and the remaining 90° is due to transit time effect.
What is the advantage of the TRAPATT diode over the IMPATT diode?
The TRAPATT diode is normally used as a microwave oscillator. It has the advantage of a greater level of efficiency when compared to an IMPATT microwave diode.
What are the applications of Trapatt diode?
BARITT Diode
| Properties | IMPATT Diode | TRAPATT Diode |
|---|---|---|
| Applications | · Voltage controlled Impatt oscillators · Low power radar system · Injection locked amplifiers · Cavity stabilized impatt diode oscillators | · Used in microwave beacons · Instrument landing systems • LO in radar |
How many types of IMPATT diode are?
The classification of IMPATT diodes can be done by two types namely single drift and double drift. Single drift devices are P+NN+, P+NIN+, N+PIP+, N+PP+.
What is the major disadvantage of IMPATT diode?
Following are the disadvantages of IMPATT diode: ➨It has high noise figure due to avalanche process & higher operating current. The shot noise is generated in the device due to high operating current. ➨It produces spurious noise (AM and FM) with higher levels compare to klystron and Gunn diodes.