Design and Experimental Study of Triangular Grid Rectangular Radial Wire Helical Array Antenna: The working principle of the triangular grid rectangular radial wire helical array antenna is introduced, and the triangular grid rectangular radial wire helical array antenna with a center frequency of 4.0 GHz is designed and numerically simulated, and the array antenna is experimentally studied. The experimental results show that at the center frequency of 4.0 GHz, the array antenna has a gain of 15.3 dB, an axial ratio of 1.58, a standing wave ratio of 1.3, and an aperture efficiency of 86%; in the frequency range of 3.8 to 4.2 GHz, circularly polarized directional radiation can be achieved, with a gain greater than 14.9 dB, an axial ratio less than 1.7, and a standing wave ratio less than 1.6.
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