Circularly Polarized Spidron Fractal Slot Antenna Arrays for Broadband Satellite Communications in Ku-Band

Abstract

Abstract-In this paper, a novel circularly polarized Spidron fractal slot antenna array developed for broadband satellite communication in the Ku-band is discussed. A Spidron fractal slot configuration was utilized as a single radiating element to achieve circularly polarized radiation. The effects of altering the feeding position on the resonance behavior and the radiative characteristics were assessed.As a consequence, the design was expanded from a single element to a 2×2 subarray and further to a 4×4 array in order to enhance the bandwidth performance of the antenna when integrated with a sequential feeding network. Two prototype arrays were fabricated and tested, and measurements revealed that the 2×2 subarray has a 10-dB reflection coefficient bandwidth between 10 and 14.28 GHz, 3 dB axial ratio bands between 10.15 and 11.15 GHz and between 11.75 and 13.92 GHz, and a maximum gain of 11.4 dB at 13 GHz. The results for the 4×4 array indicated that both the 10-dB reflection coefficient and 3 dB axial ratio bandwidths cover the entire operating frequency from 10 to 15 GHz in the Ku-band. The maximum gain for the 4×4 array was 15.63 dB at 12.6 GHz.

Single-Feed Triple-Band Circularly Polarized Spidron Fractal Slot Antenna

“…The triple-band CP operation can be realized by utilizing a Spidron fractal slot, a Z-shaped slit, and two L-shaped slits, which are etched from the ground plane. One of the present authors previously proposed a Spidron fractal slot antenna with single band CP operation [24,25]. In this work, a Spidron fractal system is formed from a series of contiguous right-angled triangles with identical angular factor (α).…”

Siw 2d Planar Array With Four Cross Slots Radiator and Tuning Vias

“…On the other hand, slots are widely used as radiating elements in waveguide array antennas in the whole microwave range [4][5][6][7][8][9].…”

Study on the Planar Circularly Polarized Antennas With Swastika Slot

“…Alternative research [11,12] has produced bent slot and wide slot antennas with parasitic patch. Single-fed wideband circularly polarized slot antennas have also been reported [8,13,14], but the acquired gain is only about 3.5 dB. Besides patch antenna, printed slot antenna can also work in a wider bandwidth.…”