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A Ka-band left-hand circularly polarized crank-line microstrip antenna is designed by HFSS. The operating frequency of antenna is 29.4–31GHz, using microstrip series-fed mode, the input impedance is 50Ω. The maximum gain of the center frequency of 30.2GHz is 11.8 dB, and 3-dB axial-ratio bandwidth is up to 10.9% (28.5–31.8GHz). The results show a better axis ratio of 2dB and VSWR of less than 1.25...
We propose an antenna gain pattern estimation method for broad band antennas. We have already reported a method for estimating the far field gain using an amplitude center modified Friis transmission formula. This equation can estimate the far field gain using near field S21(ω) measurement for two difference antenna distance. In this paper, we propose a far field gain pattern estimation method using...
A broadband circularly polarized (CP) omnidirectional antenna employing circular open-loops is investigated. The proposed antenna consists of four circular open-loop elements that have been printed around a hollow cylinder, each element has a main open-loop and a parasitic open-loop, a broadband feed network is used to excite four main open-loops, a metal reflection column is introduced in the center...
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