Errors in Shortened Far-Field Gain Measurement Due to Mutual Coupling

In this study, errors in shortened far-field gain measurement caused by mutual coupling were investigated. In addition, an averaging technique was evaluated to enhance the accuracy of gain measurement. Numerical simulation of an analysis model comprising two half-wavelength dipole antennas was performed for verification. Discrepancies were observed in the calculated distance and gain because of mutual coupling between the two antennas. These differences reduce as the distance between the antennas increases. The proposed averaging technique was shown to enhance the accuracy of gain measurement.