Design and experiment of S-band multiport radial line power divider

A novel radial line power divider using single-circled probe coupling is proposed to realize the equalamplitude in-phase multiport power division of the high power microwave. An S-band 16-port power divider is designed by analyzing the coupling characteristics of the new probe. Numerical simulation and experimental measurement are conducted for the power divider. The experiment result shows that in the frequency range of 2.55 to 3.15 GHz, the voltage standing wave ratio (VSWR) is below 1.4, the insertion loss is below 0.3 dB, the amplitude imbalance is within ±0.5 dB, and the phase imbalance is within ±5°, which proves that the power divider can realize the equal-amplitude inphase power division over a wide frequency range．