What is Gunn Diode Oscillator?
A Gunn Diode Oscillator is a source of microwave power and comprises a Gunn diode or transferred electron device (TED) as its major component. In Gunn oscillators, the Gunn diode will be placed in a resonant cavity. A Gunn oscillator consists of two major components: a DC bias and a tuning circuit.
The Gunn diode along with its timing properties causes it to behave as an oscillator provided an optimum value of current flows through it.
Important parameters when looking for a Gunn Diode Oscillator:
Frequency: Operating frequency range is the range of frequencies at which a Gunn DIode can oscillate.
Output Power: Output power is the maximum power that can be radiated by a Gunn Diode Oscillator.
Impedance: It is the total resistance a Gunn diode oscillator presents to the electrical current passing through it.
Waveguide Size: Waveguide cross-section is the size of the feed line for the signal to pass through. It is relative to the wavelength of the signal. If the wavelength of the signal is too long (Frequency is too low) compared to the cross-section of the waveguide, the electromagnetic fields cannot propagate. Cross Section is represented as “WR” followed by a number. The ‘WR’ means rectangular and the number represents the size in inches.
