Improvement of a Circular Microstrip Antenna Excited by Four Feeds and Suspended with Artificial Magnetic Conductors

Table 3

Simulated results of the circular microstrip antenna with AMC structures at the operating frequency of 2.45 GHz.

Model	Model-S	Model-C	Model-O	Reference antenna
Maximum dimension (mm)	67.50	86.25	83.10	90.00
Diameter of the patch of the microstrip antenna (mm)	36.12	41.63	39.80	55.71
Impedance bandwidth (%)	11.63	17.76	17.14	8.67
Directivity (dBi)	7.479	8.264	8.154	9.164
Gain (dBic)	6.818	7.332	7.317	6.045
Total efficiency (dB)	−0.661	−0.932	−0.836	−3.119
Half-power beamwidth (deg)	80	70.6	71.7	64.9
Axial ratio beamwidth (deg)	197.43	220.38	228.34	156.76
Polarization	LHCP or RHCP