Decoupling Network for Closely Spaced Tx/Rx Antennas Using a Directional Coupler and Transmission Lines

Table 1

Dimensions of the array antenna.

Parameters	Descriptions	Values (mm)
PL	Length of the patch	3.12
PW	Width of the patch	4.1
ITL	Impedance transformer length	1.2
ITW	Impedance transformer width	0.64
SFL	Length of the series-fed line	4
SFW	Width of the series-fed line	0.25
D	Distance between elements	2
SUBL	Length of the substrate	20.74
SUBW	Width of the substrate	20.2
SUBH	Height of the substrate	0.254