A Single-Layer S/X- Band Shared Aperture Antenna with MIMO Characteristics at X-Band for Airborne Synthetic Aperture Radar Applications

Table 3

Dimensions of the antenna design prototype of the S/X antenna.

S/X antenna parameters
Parameters	Description	Value (mm)
HG	Height of the ground	0.035
HS	Height of the substrate	1.6
SPL	Patch length	21
SPW	Patch width	21
LG	Substrate length	100
WG	Substrate width	100
R1	Inner pin	0.65
R2	Outer pin	2.17
XVF	X-coordinate of vertical polarization (SV-PORT)	0
YVF	Y-coordinate of vertical polarization (SV-PORT)	−4.5
XHF	X-coordinate of horizontal polarization (SH-PORT)	4.5
YHF	Y-coordinate of horizontal polarization (SH-PORT)	0
XPL	Patch length of array	6.85
XPW	Patch width of the array	6.85
SFW	Connection feed width-1	2.5
QTW	Connection feed width-2	0.28
MTW	Connection feed width-3	2.46
SFL	Connection feed length-1	4.85
QTL	Connection feed length-2	2
MTL	Connection feed length-3	10.25