Design and Experimental Measurement of RF Power Splitter Based on Cohn Topology

Power splitter/divider is essential components in radio frequency (RF) sections that function to divide or combine power according to the required ratio in an RF circuit. The addition of resistors or modifications to the power splitter circuit is addressed to obtain better performance. This paper discusses the design and experimental measurement of an RF power splitter using Cohn topology which is fabricated using a Roger RO4003C dielectric material with the size of
$33\ \text{mm} \times 51$
mm. The proposed 3-port RF power splitter intended to work at the frequency range of 1.5 GHz to 3.5 GHz which can be used in RF power amplifiers. The measurement results of realized RF power splitter for isolation parameter are ≤ −15 dB, while the average transmission coefficient is around −3.6 dB. The bandwidth produced for the reflection coefficient ≤ −10 dB reaches up to 2 GHz. The measurement results show good performance, so that the Cohn topology can be used as an alternative configuration on RF power splitter.