Coupling between wire antennas: analytic solution, FDTD, and measurements

The investigation of mutual coupling is of great importance and can contribute to the development of improved and reliable communication systems. In this paper, the coupling between wire antennas, e.g., monopoles, "towel-bar" and inverted-L antennas is analytically computed. Furthermore, the finite-difference time-domain (FDTD) method is used to calculate the coupling between these antennas. Both analytical and FDTD results are validated by comparison with measurements. Finally, the mutual coupling between wire antennas mounted on helicopter airframes is computed using FDTD and compared with measurements.