Q.1.
In microwave oscillators, negative resistance transistors and diodes are used in order to generate oscillations in the circuit.
Q.2.
If SWR=1.5 with a wavelength of 4 cm and the distance between load and first minima is 1.48cm, then the reflection coefficient is:
Q.3.
The klystron tube used in a klystron amplifier is a                    type beam amplifier.
Q.4.
In crossed field tubes, the electron beam traverses the length of the tube and is parallel to the electric field.
Q.5.
A major disadvantage of klystron amplifier is:
Q.6.
Magnetrons are microwave devices that offer very high efficiencies of about 80%.
Q.7.
Klystron amplifiers have high noise output as compared to crossed field amplifiers.
Q.8.
2 IMPEDANCE MATCHING
Q.9.
High gain is not achievable at microwave frequencies using BJT amplifiers because:
Q.10.
The transfer function of an RF oscillator is given by:
Q.11.
A major advantage of differential amplifiers is:
Q.12.
Along with a differential amplifier,hybrid is used both at the input and output.
Q.13.
is a non linear circuit that converts DC power to an AC waveform of desired frequency based on the oscillator design.
Q.14.
In conventional amplifiers, a flat gain response is achieved at the cost of reduced gain. But this drawback can be overcome by using:
Q.15.
The criterion on which oscillations are produced in the oscillator circuit is called: