Non-Reflective Transmission-Line Filters for Gain Slope Equalization

In this paper we present several topologies of simple non-reflective filters using transmission lines and resistive elements. These filters are well-matched at all frequencies, making them especially suitable for gain slope equalizers without the need for external attenuators or isolators. The application of these filters to a 2-4 GHz, plusmn15 dB selectable-slope equalizer for the expanded very large array is described with measured results that are in good agreement with theory.