Study on Horizontally Polarized Omnidirectional Microstrip Antenna

Table 3

Comparison of gain variations.

	Physical length		By formula (dBi)	By HFSS (dBi)
Patch number 1	61.5 mm	0.323 λ	11.1	7.0
Patch number 2	44.1 mm	0.232 λ	5	3.1
Patch number 3	31.4 mm	0.165 λ	2.4	1.0
Patch number 4	25.2 mm	0.132 λ	1.54	0.8