Compact planar ultra-wideband power dividers with frequency range up to 67 GHz for multichannel receivers

This paper presents two ultra-wideband power dividers, based on a Wilkinson divider, with ranges of operating frequencies 2-12 GHz and 8-67 GHz. These dividers have been designed for equal splitting a local oscillator signal in four-channel measurement receiver of a vector network analyzer. For 8-67 GHz divider a novel input circuit, based on a resistive splitter and coupled lines was proposed. Using this circuit occupied area of the topology was greatly reduced, and outstanding value of isolation (more than 20 dB from 8 GHz to 67 GHz and above) was obtained.