Beamwidth-Enhanced Low-Profile Dual-Band Circular Polarized Patch Antenna for CNSS Applications

Table 2

Comparisons between our design and previous dual-band CP antennas.

Antenna	Overall size ()	Impedance bandwidth (%)	3 dB AR bandwidth (%)	HPBW^a
Ref. [9]	0.483 × 0.483 × 0.015	2.3	0.62	100°
		3.1	0.69	114°
Ref. [10]	0.524 × 0.524 × 0.224	≥10	≥10	135°
		≥10	≥10	112°
Ref. [11]	0.211 × 0.211 × 0.057	5.5	4.2	120°
		6.1	2.6	116°
Ref. [12]	0.573 × 0.573 × 0.296	46.3	13.0	103°
			30.2	111°
Ref. [13]	0.368 × 0.368 × 0.105	6.5	Not given	108°
		8.2	Not given	107°
Ref. [14]	0.38 × 0.38 × 0.024	9.1	1.5	<60°
		5.1	1.1	<60°
This work	0.523 × 0.523 × 0.018	32.7	4.1	103°
			6.5	113°

λ₀ is the wavelength in air at the lower center frequency. ^aThe lower value in the xoz and yoz planes.