Compact SIDGS Filtering Power Divider With Three-Port 10-GHz Reflectionless Range

In this brief, a compact high isolation filtering power divider (FPD) with wide stopband and wide-band three-port reflectionless operation is proposed. Such FPD consists of trigonometric substrate-integrated defected ground structure (SIDGS) based resonator three absorptive networks. The good performance achieved by using the SIDGS. Meanwhile, networks on common-gate topology capable absorbing out-of-band reflected signals are connected to SIDGS resonator, which provides wideband in all ports FPD. To verify mechanisms mentioned above, operated at 2.10 GHz (i.e., $\boldsymbol {f_{0}}$ ) fabricated, exhibits 42 dB rejection level up 20 notation="LaTeX">$9.5\boldsymbol ). measured range return loss lower than −10 10 ports. core size about notation="LaTeX">$0.36\,\,\boldsymbol {\lambda _{g}} \times 0.38\,\,\boldsymbol _{g}}$ , where microstrip guided wavelength center frequency.