High-Gain Textile Antenna Array System for Off-Body Communication

Figure 21

S-parameter measurements after acclimatization of the array, measured in a nonanechoic environment: reflection coefficients at port 1 of the array and mutual coupling between port 1 of the array and the other three ports.

(a) Reflection coefficients at port 1

(b) Mutual coupling between port 1 and 2

(c) Mutual coupling between port 1 and 3

(d) Mutual coupling between port 1 and 4