The concept of ultra-wideband (UWB) reconfigurable mmWave/THz microstrip antenna with a newfangled gold radiating patch with two PIN diodes installed on a benzocyclobutene (BCB) polymer is presented. The reconfigurable types of the proposed antenna are frequencies, bandwidths (BWs), and beams reconfigurations. This reconfigurable antenna was designed and simulated with the time-domain based on a FIT solver at the CST MWS solver, while the comparison was with the frequency-domain based onthe FEM solver at the CST MWS solver. The simulation results obtained from both solvers were in fair agreement, supporting the proposed antenna design. These antennas may be used in cellular communication at mmWave/THz band for beyond 5G.
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