Analysis and Design of Cavity-Backed Probe-Fed Hybrid Microstrip Antennas on FR4 Substrate

Table 4

Comparisons between CBHM and SIW antenna characteristics.

	CBHM	-1	-2	-3	-4
Bandwidth MHz	110	109	109	107	101
Directivity dB	7.4	7.4	7.1	6.8	6.5
Radiation efficiency %	69.2	69.3	68.6	67.3	66.2
CPLH-P dB	−41.6	−37.5	−32.5	−31.6	−29.2
ΔCPLH-P dB	−43.5 to −39.0	−39.8 to −34.7	−34.7 to −29.7	−33.4 to −28.8	−31.4 to −26.0