Integrated lossy low-pass filter

摘要

An apparatus for filtering a signal is disclosed. The apparatus includes a conductive line affixed to a surface of a substrate. For a signal received at an end of the conductive line, the apparatus is configured to filter at least a portion of the frequency components of the signal. First and second resistive films are adjacent to a respective side of the conductive line along a first side of each of the first and second resistive films, respectively. The first and second resistive films have a first resistivity. Third and fourth resistive films adjacent to a respective one of the first and second resistive films along a second side of each of the first and second resistive films. Each second side of the first and second resistive films extends beyond the third and fourth resistive films. The third and fourth resistive films have a second resistivity.

主权项

1. An apparatus for filtering a signal, the apparatus comprising:
a substrate; a conductive line affixed to a surface of the substrate; first and second resistive films affixed to the surface of the substrate, wherein each of the first and second resistive films is adjacent to a respective side of the conductive line along a first side of each of the first and second resistive films, respectively, wherein the first and second resistive films exhibit a first resistivity; and third and fourth resistive films affixed to the surface of the substrate, wherein each of the third and fourth resistive films is adjacent to a respective one of the first and second resistive films along a second side of each of the first and second resistive films, wherein each second side of the first and second resistive films extends beyond the third and fourth resistive films along a long axis of the conductive line, wherein the third and fourth resistive films exhibit a second resistivity; wherein the conductive line is a tapered conductive line and a sum of respective widths of the tapered conductive line and the first and second resistive films is constant; wherein, for a signal received at an end of the conductive line, the apparatus is configured to filter at least a portion of the frequency components of the signal.