Study on Sequential Feeding Networks for Subarrays of Circularly Polarized Elliptical Dielectric Resonator Antenna

SCRLH-TL Based Sequential Rotation Feed Network for Broadband Circularly Polarized Antenna Array

“…When the SR techniques are used, the radiated polarization type of the element cannot be considered and the overall bandwidth performances of CP antenna arrays can be significantly improved. Until now, many CP antenna arrays using SR feed networks have been reported [4][5][6][7][8][9][10]. In [4], CP antenna array with wide axial ratio (AR) bandwidth was obtained by rotating linearly polarized elements sequentially.…”

“…The serial feed SR technique improved the bandwidth, radiation pattern, and polarization purity over a wider frequency band compared with the coplanar corporate feed network. In [10], three different types of wideband feeding networks, including parallel feeding network, series feeding network and hybrid ring feeding network, were studied to optimize the CP bandwidth. For the CP dielectric resonator antenna subarray with hybrid ring feeding network, the impedance matching bandwidth (|S 11 | < 10 dB) and 3-dB AR bandwidth achieved were 44% and 26%, respectively.…”

Wide-Beamwidth Circularly Polarized Antenna and Its Application in a Sequential-Rotation Array With Enhanced Bandwidth

“…Due to its simple structure with single-fed and single-layered construction, the proposed CP asymmetric microstrip antenna can be easily employed as an array element. Furthermore, four asymmetric microstrip antennas are used to constitute a sequential-rotation array (SRA) [12][13][14][15], the 3-dB AR bandwidth of which is improved from 1.5% to 7.8% (1.524-1.648 GHz, which covers the GPSband and CNSS-band) with the wide-beamwidth property. In addition, 1-dB the gain variation is achieved by properly optimizing the radii of the fan-shaped notches within the operating bandwidth.…”

Axial Ratio Bandwidth of a Circularly Polarized Microstrip Antenna

“…The previous reference books discussed the axial ratio bandwidth less, always said that the axial ratio bandwidth of a circularly polarized microstrip antenna was limited, and it was less than the impedance bandwidth of a linearly polarized microstrip antenna (Lin & Nie, 2002). The group of Professor Ahmed A. Kishk has done a lot of research work on the circularly polarized microtrip antenna recently ; (Yang et al, 2007); (Yang et al, 2006); ; . We adopt theoretical analysis and simulation by CST Microwave Studio to give out the method of improving the axial ratio bandwidth of the circularly polarized microstrip antenna.…”