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Impedance level of Impatt diodes is generally lower than that of Gunn diodes

Correct Answer: True

Explanation:

An Impatt diode has n+ - p - i - p + structure and is used with reverse bias.


It exhibits negative resistance and operates on the principle of avalanche breakdown.


Impatt diode circuits are classified as broadly tunable circuit, low Q circuit and high Q circuit.


The impedance of Impatt diode is a few ohms. The word Impatt stands for Impact Avalanche Transit Time diode.


The features of Impatt diode oscillator are : frequency 1 to 300 GHz, Power output (0.5 W to 5 W for single diode circuit and upto 40 W for combination of several diodes), efficiency about 20%.


Its applications include police radar systems, low power microwave transmitter etc.


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