Wideband Dual-Polarized Differential-Fed Filtering Microstrip Patch Antenna with High Suppression and Wide Stopband

Figure 2

The design procedure from antenna I to antenna II to antenna III to antenna IV to proposed antenna. The geometric dimensions of each antenna are as follows (unit: mm): , , and for antenna I; , , , and for antenna II; , , , , and for antenna III; and , , , , , , , and for antenna IV.