Patent ID: 6380815
Filing Date: 2002-04-30
Classification: G01S,H03B

Abstract:
A microwave pulse generator for generating microwave pulses having a pulse duration in the nanosecond range, comprising:a pulse generator for generating control pulses, and a microwave oscillator for generating microwave oscillations, the microwave oscillator including an active semiconductor amplifier which includes a resonant circuit determining a frequency, and an ohmic device which reduces the resonant Q-value of the resonant circuit, with a first terminal of the ohmic device connected to a reference potential and a second terminal of the ohmic device connected to a source terminal of the semiconductor amplifier, wherein a control pulse of the pulse generator supplied to an input terminal of the semiconductor amplifier produces a microwave oscillation that can be tapped at an output terminal of the microwave oscillator, wherein the microwave oscillation at least approximately follows the temporal course of the control pulse, and wherein the microwave pulses are coupled out at a source/emitter terminal of a transistor, wherein the semiconductor amplifier is formed by said transistor and the resonant circuit determining the frequency is formed by an internal capacitance of said transistor and an inductance connected to the gate terminal of said transistor, and wherein the microwave oscillator comprises a series resonant circuit with an inductance and the gate/base-drain/collector path of said transistor.