Research Article
Investigation of Planar Isolators for Mutual Coupling Reduction in Two-Dimensional Microstrip Antenna Arrays
Table 1
S-parameters of isolators in the 2 × 2 antenna array.
| | Antenna array | S21 (dB) | S31 (dB) | S34 (dB) | S24 (dB) | Gain (dBi) | Radiation efficiency (%) |
| | Reference antenna array | −21.6 | −22.9 | −23.2 | −23.0 | 3.48 | 52.6 | | Case 1 | −26.9 | −28.1 | −27.4 | −30.0 | 3.23 | 46.9 | | Case 2 | −28.7 | −29.0 | −29.3 | −29.1 | 3.05 | 48.1 | | Case 3 | −23.6 | −27.8 | −23.9 | −29.6 | 3.42 | 53.5 | | Case 4 | −26.3 | −28.6 | −25.8 | −29.2 | 3.42 | 54.2 |
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