Dual-Frequency Miniaturized Substrate Integrated Waveguide Quarter-Mode Cavity-Backed Antenna Based on Minkowski Fractal Gap with Orthogonal Polarization Radiation Characteristics

Table 2

Effect of ground size on radiation performance of antenna.

Size of the ground		Mode		Mode
L (mm)	W (mm)	Gain (dBi)	Radiation efficiency (%)	Gain (dBi)	Radiation efficiency (%)
27	23.	4.18	85.2	3.63	78.5
37	23	4.14	84.9	4.35	84.7
47	23	4.30	84.2	4.42	84.6
42	23	4.23	84.6	4.44	84.3
42	33	4.72	84.8	4.99	83.8
42	43	4.95	84.4	5.26	83.6