Microstrip FET oscillator with dielectric resonator

A microwave oscillator comprising:

• a planar substrate;
• a field effect transistor having a gate electrode, a drain electrode and a source electrode and disposed on the substrate;
• an elongated gate transmission line connected to the gate electrode of the field effect transistor and disposed on the substrate;
• a matching impedance for terminating said gate transmission line;
• an elongated drain transmission line connected to the drain electrode of the field effect transistor and disposed on the substrate at a predetermined angle to the gate transmission line, said angle being substantially a right angle;
• a source transmission line connected to the source electrode and disposed on the substrate and producing the oscillating output;
• a dielectric resonator disposed within said angle formed between the gate transmission line and the drain transmission line;
• and
• a resistance connected between the source transmission line and the gate transmission line.

A microwave oscillator comprising;

• a planar substrate;
• a field effect transistor having a gate electrode, a drain electrode and a source electrode and disposed on the substrate;
• an elongated gate transmission line connected to the gate electrode of the field effect transistor and disposed on the substrate;
• a matching impedance for terminating said gate transmission line;
• an elongated drain transmission line connected to the drain electrode of the field effect transistor and disposed on the substrate at a predetermined angle to the gate transmission line, said angle being substantially a right angle;
• an elongated source transmission line connected to the source electrode and disposed on the substrate and producing the oscillating output;
• a first dielectric resonator disposed within said angle formed between the gate transmission line and the drain transmission line;
• and
• a second dielectric resonator disposed within an angle formed between the drain transmission line and the source transmission line.