Characteristic mode analysis has proven useful in the design of multi-input multi-output antennas. By identifying characteristic current modes associated with a conductive structure, the designer can place ports to re...
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Characteristic mode analysis has proven useful in the design of multi-input multi-output antennas. By identifying characteristic current modes associated with a conductive structure, the designer can place ports to replicate those current modes, which should generate orthogonal far fields with high isolation from one another. An algorithm that uses characteristic mode analysis is proposed to synthesise multi-input multi-output antennas from a conductive structure by determining port placement and excitations without visual inspection. Our algorithm uses a correlation metric to determine the proper excitation from a particular port, and uses a global optimisation algorithm to determine the optimal port placement. Given a particular structure and a domain of possible port locations, our algorithm places ports and generates excitations to synthesise the desired multi-input multi-output antenna. Our algorithm is used to synthesise and simulate a simple 3D cell phone model with a metal ground plane, metal rim, and dielectric. The result is an antenna with the desired six isolated channels at 2.5 GHz.
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