High gain multiband circular loop antenna with ring resonators reflectors by using FSS technique

A multiband circular loop antenna with parasitic C‐strip line and FSS ring resonator reflectors for WLAN and WiMAX applications

“…Specifically, the presented antenna can reduce the size of the overall dimension by about 16% compared with the proposed antenna in Ref. because the antenna in Ref. did not consider the parameters of ϕ g1 in (2) and ϕ g1 + ϕ g2 in (3), resulting in the incomplete in‐phase.…”

“… because the antenna in Ref. did not consider the parameters of ϕ g1 in (2) and ϕ g1 + ϕ g2 in (3), resulting in the incomplete in‐phase. In addition, the presented antenna considers these parameters to approach a higher accuracy in‐phase.…”

“…The presented antenna design is divided into two parts, including radiator and FSS reflector. Using the radiator design , the method includes the circular loop, parasitic strip line, and C‐strip line. The circular loop on the top layer has a circumference ( L 1 ) of one wavelength equal to 63.15 mm at 3.5GHz.…”

“…In addition, the antenna with three FSS layer was proposed to improve the antenna gain as reviewed in Ref. . Nevertheless, the antenna still had a large dimension because it did not consider the occurring transmission coefficient phase angle of each reflector, resulting in the incomplete in‐phase of the antenna.…”