An RF fitter, which is applied to C-band receiver RF front and designed with the coupling micros - trip line, is introduced.

The subcircuits consist of the low noise amplifier, RF filter, mixer, driver amplifier, image filter, power amplifier, transmit-receive switch and if filter and so on.

The author's solution to this problem is to use a tuneable RF preamplifier which also acts as a low pass filter when tuning the low end of the 88-108 MHz band where most of the exotic channels lie.