Patent ID: 6087906
Filing Date: 2000-07-11
Classification: H03G

Abstract:
An amplitude filter for high frequency signals, said amplitude filter having an input port and an output port having a circuit path therebetween, comprising:a reflective amplitude filter having:a first .lambda./4 line having an input side and an output side in said circuit path, said output side coupled to said output port;a first diode connected between said input side of said first .lambda./4 line and a reference potential; anda second diode connected between said output side of said first .lambda./4 line and said reference potential; andan absorption circuit for absorbing a high power signal received at said input port having:a second .lambda./4 line in said circuit path, said second .lambda./4 line being connected between said input port and said input side of said first .lambda./4 line;a third diode connected in series between said input port and a load resistor being in turn connected to said reference potential; andan HF block connected in parallel to said load resistor.