Radiation Efficiency Improvement Method for Multifeed Circular Polarization Antenna Array with Mutual Coupling Effect

Table 3

Dimensions of the improved antennas.

Stub	11	21	31	41	51	61	71
Length (mm)	0.3	0.3	0.1	0.1	0.1	0	0.1
Stub	12	22	32	42	52	62	72
Length (mm)	0.2	0	−0.1	−0.2	0	0.2	0.3