A WIDE-BAND MULTIPORT PLANAR POWER-DIVIDER DESIGN USING MATCHED SECTORIAL COMPONENTS IN RADIAL ARRANGEMENT

This paper proposes a new multiport planar power-divider design by rad ially combining the sectorial components and the input and output matc hing networks. This design can achieve good input match over a wide ba ndwidth without resorting to transformer sections of high-impedance li nes, which are difficult to realize. This approach is applied to the d esign of 4- and 14-way center-fed power dividers in microstrip structu res with good input match (voltage standing-wave ratio (VSWR) <1.5) ov er a bandwidth of 30% and 15%, respectively. The return loss of output ports and the isolation among them in the 14-way divider are less tha n -13 dB, A simple analysis method using the radial transmission-line theory to model the microstrip sectorial components is employed to cha racterize the power dividers, The calculated scattering parameters are found to be in good agreement with the measured data.