Decoupling of Multifrequency Dipole Antenna Arrays for Microwave Imaging Applications

Figure 4

Coupling coefficients calculated from the S-parameters measurements: Left column without superstrate (free space) and right column with superstrate. (a), (b) Coupling between dipoles operating at 𝑓₁=  HRF. (c), (d) Coupling between dipoles operating at 𝑓₂ = LRF. (e), (f) Coupling between dipoles operating at different frequencies 𝑓₁₂ (cross-frequency coupling).

(a)

(b)

(c)

(d)

(e)

(f)