Low-loss ultra-wideband double-sided parallel-strip line transition and power divider
T.W. Eubanks, K. Chang
Volume: 56, Issue: 1, Jan. 2010
93 - 94
The double-sided parallel-strip line (DSPSL) transitions and circuits demonstrated in  inspired the planar ultra-wideband (UWB) antenna design in . After building and measuring the designed
antenna in , the authors decided to redesign the coaxial-to-DSPSL transition described in  to reduce the losses associated with the transition. After reducing the transition’s losses, the authors designed and measured a connectorised power divider over the UWB range capable of facilitating a differentially fed UWB antenna array. Other applications for the DSPSL are given in  and , and  gives the equations necessary to calculate the characteristic impedance of a DSPSL for impedance matching. This Letter describes a low-loss transition from a coaxial transmission line to
a DSPSL, and it also describes a power divider that uses this transition to achieve good results across the entire UWB range (3.1–10.6 GHz). Both circuits were designed on 31 mil Duroid 5880 substrate.
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