Abstract: A synthesizer incorporating voltage tunable capacitors, comprising at least one resonator coupled into a base circuit of a bipolar transistor, the at least one resonator including at least one voltage tunable capacitor; the bipolar transistor including a collector which terminates in a radial micro strip stub and an emitter which produces an output via an impedance matching circuit, a buffer amplifier and an RF filter; a frequency divider, programmable phase locked loop and loop filter receiving the output of the RF filter and providing the input to a controller; an integral switch mode power supply providing power to the base circuit via a first power supply filter, and the controller via a second power supply filter. The controller scales the user-selected control voltage range to the levels required by the voltage tunable capacitors associated with the at least one resonator.