A Transmitted Cross-Polarization Converter Based on the Stripline Filter

In this paper, a transmitted cross-polarization converter based on the stripline filter is proposed. The cross-polarization convert can transmit Y-polarization linear waves to X-polarization linear waves and transmit X-polarization linear waves to Y-polarization linear waves with high frequency selectivity. The high frequency selectivity is realized by the structures of the stripline filters, which are two same 90°transmission lines for the unit cell with second-order filter response and two same half-wavelength transmission lines for the unit cell with third-order filter response. The simulation results show that the unit cell with third-order filter response has a more excellent frequency selectivity than the unit cell with second-order filter response. The electrical field distribution of the incident and transmitted waves can directly show the function of the cross-polarization converter. It is evident that the stripline filter is effective in improving frequency selectivity. The transmitted cross-polarization converter is a potential alternative in some wireless communication systems.