Ultra broadband network of fixed or switched frequency selective filters

摘要

An extensible filter structure is disclosed allowing realizable effective filtering over many decades in frequency. Multiple devices operating with mismatched frequency ranges can be multiplexed together with or without switching.

主权项

1. An electrical circuit comprising:
a first diplexer comprising:
a first low pass filter comprising a first input and a first output, wherein the first low pass filter defines a first low pass cutoff frequency; anda first high pass filter comprising a second input and a second output, wherein the first high pass filter defines a first high pass cutoff frequency and the first and second inputs are directly electrically coupled together; and a second diplexer comprising:
a second low pass filter comprising a third input and a third output, wherein the second low pass filter defines a second low pass cutoff frequency; anda second high pass filter comprising a fourth input and a fourth output, wherein the second high pass filter defines a second high pass cutoff frequency; wherein:
the first output, the third input, and the fourth input are directly electrically coupled together;the first low pass cutoff frequency and the first high pass cutoff frequency are substantially the same;the second low pass cutoff frequency is less than the first low pass cutoff frequency;the second high pass cutoff frequency is less than the first high pass cutoff frequency; andthe second low pass cutoff frequency and the second high pass cutoff frequency are substantially the same.