A Design of Broadband Circularly Polarized C-Shaped Slot Antenna With Sword-Shaped Radiator and Its Array for L/S-Band Applications

A Design of Broadband Circularly Polarized C-Shaped Slot Antenna With Sword-Shaped Radiator and Its Array for L/S-Band Applications

Blog Article

In this paper, a novel wideband circularly polarized (CP) slot antenna and its array are presented.The antenna element consists of a C-shaped slot and a 50-Ω microstrip-fed port to achieve left-hand circular polarization.Both the impedance bandwidth (IBW) and the Wooden Dollhouse Accessories 3-dB axial ratio bandwidth (ARBW) are greatly broadened by off-center microstrip-fed sword-shaped structure.

A 2 × 2 array prototype based on the proposed CP element is also designed.Sequential rotation microstrip-feeding structure is used to excite four antennas and to Decorative Cushion realize good symmetric unidirectional radiation.To verify this design, both the CP antenna element and 2×2 array are fabricated and measured.

The measured results of the antenna element exhibit an IBW of 132% (0.85-4.15 GHz) and an ARBW of 95.

7%(1.20-3.40 GHz).

The measured ARBW and IBW of the 2×2 antenna array are about 108.3% (1.10-3.

70 GHz) and 100%(1.15-3.45 GHz), respectively.

And the measured peak gain of the antenna array reaches 13.4 dBic.The proposed antenna is very suitable for CP applications in L/S bands.