Thomson-csf

Bernard Le Clerc

Alain Bert

Bernard Epsztein

Yves Archambault

Jean-Jacques Godart

A device using a dielectric resonator with a very low temperature coefficient in a very high frequency transistor oscillator (3 to 10 GHz) so as to benefit both from the very high power available and the maximum frequency stabilization due to the resonator. In the case of a FET, the gate is connected to one end of a line coupled to a dielectric resonator at a point along the line situated at a quarter wavelength from the other end of the line, which in turn is connected through a discrete resistor to a half wavelength open circuit line. Thus, the oscillation is damped when the frequency varies from the resonant frequency of the resonator.

Microstrip transistor oscillator with dielectric resonator stabilization

Stabilization on a desired frequency fo of a solid-state oscillator is obtained by means of an additional damping load 6 preventing oscillations outside a narrow band about this frequency. In order to prevent losses in said load, the load in question is cut out at frequency fo by a stop band filter 7 mounted in the transmission line to which is connected the oscillator, a negative resistance diode 4, arranged in series with the load and terminated on a reactive impedance. Realization may be carried out by way of microband technology for devices operating at 10 gigahertz with an output power of several watts.

Microwave, solid-state, stabilized oscillator means

Parametric coupling device for traveling-waves, comprising a first signal wave, a second idler wave and a third pump wave, wherein a transmission line for said traveling-waves is formed on a substrate of dielectric material, which comprises a virtually continuous network of non-linear interaction elements, modulated by the pump wave, and so modulating the conduction properties of the transmission line and enabling intermodulation to be set up between the various traveling-waves. The virtually continuous network of non-linear interaction elements is a substantially plane network, each non-linear interaction element being at a distance a, or pitch of the network, from a neighbouring non-linear element, the distance a being less than the smallest of the wavelength of the signal, idler and pump waves and the plane network being disposed in the neighborhood of the upper surface of the transmission line.

Growing community of inventors

Paris, France

Bernard Le Clerc