Improved Design of a Broadband Dielectric Resonator Antenna with Wide Beam

Table 1

Comparisons of different wide-beam antennas.

Antenna structures	BW (%)	Maximum 3 dB beam width	Size ()
Proposed antenna	35	214°	0.42 × 0.18 × 0.16
Reference [1] (metal antenna)	22.4	185°	0.61 × 0.61 × 0.22
	33	136°	0.89 × 0.89 × 0.32
Reference [2] (metal antenna)	59	165°	0.64 × 0.64 × 0.16
Reference [3] (metal antenna)	4	180°	0.32 × 0.31 × 0.03
Reference [8] (DRA)	10	86°	3 × 3 × 0.25
Reference [9] (DRA)	5	130°	0.79 × 0.79 × 0.15