Circularly Polarized Dielectric Resonator Antenna Arrays with Fractal Cross-Slot-Coupled DRA Elements

Table 2

Comparisons to other reported DRAAs.

Reference	Yang et al. [3]	Pang et al. [13]	Akbari et al. [14]	Rana and Parui [19]	This work
Type of array element	Rectangular-slot coupled elliptical DRA	Cross-slot coupled-cylindricalDRA	Cross-slot-coupled rectangular DRA	Microstrip line-fed rectangular DRA (dual feeds)	Fractal cross-slot-coupled rectangular DRA
Type of feeding network	Sequential feeding network	Parallel feeding network	Sequential feeding network	Series feeding network	Sequential feeding network
Experiment verification	Yes	Yes	No	Yes	Yes
Element number	2 × 2	2 × 2	2 × 2	1 × 4	2 × 2
Impedance bandwidth	43.9%	19%	48.31%	17%	51.5%
3 dB axial ratio bandwidth	26.1%	16%	21.67%	10%	38.3%
Effective AR bandwidth	26.1%	16%	21.67%	10%	38.3%
Peak gain	About 12 dBi	About 12 dBi	12.6 dBi	13.6 dBi	12.17 dBi