A Circularly Polarized Cylindrical Dielectric Resonator Antenna Using a Helical Exciter

Bandwidth enhancement of helix excited cylindrical dielectric resonator antennas by means of stacking

“…The concept was also experimentally verified. In this paper we show that the 3 dB axial ratio bandwidth of the antenna reported in [15] can be enhanced up to 11% by means of stacking. The stacking method has been used to enhance the impedance bandwidth of the linearly polarized DRAs [16], [17].…”

“…In our previous work [15] we introduced an efficient method to produce circular polarization in a cylindrical DRA. The exciter was a coaxial line fed mono-filar tape helix that two orthogonal HE 11δ modes in phase quadrature on a cylindrical DRA that leads to circular polarized radiation.…”

Circularly Polarized Dielectric Resonator Antennas: Design and Developments

“…Due to these numbers of attractive features, the CP system is widely used in satellite communications, mobile communication, navigation systems, radar system and global positioning system [26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45]. To obtain more information from targets, the polarization used in radar system is circular [46]. Circular polarization is especially used in satellite communications since the polarization of a signal may change during its propagation [17].…”

High Gain Circularly Polarized Rectangular Dielectric Resonator Antenna Array With Helical-Like Exciter

“…There are different mechanisms, by which a circularly polarized DRA can be obtained, such as dual coaxial probe [13], dual conformal strip [14], with parasitic strips [15], rotated sequential feed [16], aperture feed [17], spiral slot [18], and special shaped DRA. The method of producing circular polarized radiation using cylindrical DRA with helical exciter has been reported in [19] recently. In this paper, the helix feed excites two orthogonal HE 11δ modes in phase quadrature in the DRA, resulting in a circular polarized wave.…”