Design of Filtering Coupler Based on Patch Resonator with High Selectivity

Figure 7

Simulated and measured results of filtering coupler. (a) , , and (red and blue lines represent the curves of and , respectively); (b) , , and (red and blue lines represent the curves of and , respectively); (c) , , and (red and blue lines represent the curves of and , respectively); (d) 0° and 180° phase differences between port 2 and port 3.

(a)

(b)

(c)

(d)