Compact MMW dual-polarized array antenna

A compact dual-polarized millimeter wave (MMW) microstrip array antenna was designed. Firstly, the antenna element was designed. The antenna element was fed by coplanar microstrip line and coupling slot. The high polarized-isolation could be obtained by the mixed feed points and reversed phase technology. The antenna array was designed by shunt fed. Finally, this antenna array was fabricated and measured. The measured data shows that the antenna VSWR is less than 2.0 and the polarized-isolation is 35 dB. And the antenna gain of horizontal polarization beam is over 12 dB while that of vertical polarization beam is over 11.5 dB.