초록 ▼

To implement a high-gain amplifier in a microwave frequency band, it is proposed to interconnect amplification circuits and to cover the housing that contains them with a lid. In the space between the lid and the amplification circuits, inside the housing, waveguides are provided whose cutoff freque

To implement a high-gain amplifier in a microwave frequency band, it is proposed to interconnect amplification circuits and to cover the housing that contains them with a lid. In the space between the lid and the amplification circuits, inside the housing, waveguides are provided whose cutoff frequency is such that it allows none of the modes that can be present at the frequencies of the working band to propagate. It is shown that, by forming such waveguides in said space, instead of filling it with absorbents, much better radio isolation is obtained between the output and the input to avoid interfering reinjections. As a result, in the same housing, it is possible to achieve amplification of up to 90 dB, whereas, hitherto, the limit of 45 dB per housing could not be exceeded.

대표청구항 ▼

[ What is claimed is:] [1.] A high-gain amplifier for amplifying electrical signals distributed in a high-frequency band, the amplifier comprising:a support;an amplification circuit mounted on the support, the amplification circuit comprising an input on a first side and an output on a second side o

[ What is claimed is:] [1.] A high-gain amplifier for amplifying electrical signals distributed in a high-frequency band, the amplifier comprising:a support;an amplification circuit mounted on the support, the amplification circuit comprising an input on a first side and an output on a second side opposite from said first side;a cover disposed over the amplification circuit; andsubdivision means for subdividing into a plurality of auxiliary waveguides a space situated between the cover and the support, the characteristics of the auxiliary waveguides being unsuitable for enabling a signal whose frequency is situated in the high-frequency band of the amplifier to propagate between the output and the input of the amplification circuit, wherein the subdivision means comprises a bar having a conductive outside surface, aligned in a direction going from the input to the output of the amplification circuit, and disposed between the support and the cover, on edges of integrated circuits forming the amplification circuit.