Low current GaAs MMIC family with a miniaturized band-stop filter for Ku-band broadcast satellite applications

A low-current GaAs MMIC (monolithic microwave integrated circuit) family has been designed, fabricated, and tested for broadcast satellite receivers operating in the 11.7 to 12.2 GHz range. There are three kinds of MMICs: a low noise amplifier, a filter-type image rejection mixer, and an intermediate frequency amplifier. The total current dissipation of the three MMICs is only 35 mA. A single chip image rejection downconverter, in which the three circuits are integrated, has been successfully fabricated. The downconverter has no external hybrids and exhibits a noise figure of 3.5 dB, a conversion gain of 37 dB, and an image rejection of 40 dB. >