Compact and Broadband Rectangular Waveguide Power Divider/Combiner Using Microstrip-Fed Antisymmetric Tapered Probe

In this paper, a compact and broadband rectangular waveguide power divider using the T-junction with antisymmetric tapered probe is proposed. The power divider is compact due to the adoption of the microstrip-fed antisymmetric tapered probe. In addition, the power divider has a broadband performance that the transmission coefficients of the two output ports are around -3.2 dB and the reflection coefficient of the input port is smaller than -15 dB from 8.48 to 12.04 GHz, almost covering the whole X-band (8.2-12.4 GHz). To advance this power divider as a power divider/combiner, a Wilkinson power divider is used to replace the T-junction. The power divider/combiner using the Wilkinson power divider with antisymmetric tapered probe is compact and has a broadband performance that shows equal power division, small reflection, and good isolation for all ports in the whole X-band. The transmission coefficients of the two output ports are around -3.3 dB and the reflection coefficient of the input port is smaller than -15 dB. In addition, the reflection coefficients of the two output ports are smaller than -12.6 dB and the isolation between the two output ports is smaller than -17.5 dB.