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

Table 4

Comparisons to other reported low-sidelobe-level DRA arrays.

Reference	Jin et al. [15]	Lin et al. [16]	Nikkhah et al. [17]	Gupta et al. [20]	This work
Type	DRA array using DIIG	Series microstrip feeding network	Series microstrip feeding network	Parallel substrate integrated waveguide	Series microstrip feeding network
Experiment verification	Yes	Yes	No	No	Yes
Element number	2 × 10	1 × 8	2 × 8	1 × 8	1 × 6
Impedance bandwidth	>28.6%	38.1%	22.4%	13.3%	33.1%
Design objective of SLL	−20 dB	−25 dB	−24 dB	Not given	−20 dB
Obtained SLL	−17.5 dB	−23.01 dB	−22.6 dB	−21.4 dB	−19.23 dB
Peak gain	15.8 dBi	15.7 dBi	17.4 dBi	13.41 dBi	13.43 dBi
3 dB axial ratio bandwidth					12.4%