| Summary: | The future of 5G New Radio development has many significant concerns. We present and investigate a frequency-reconfigurable antenna based on a PIN diode to overcome the working frequency band issue. The dimensions are 30 mm × 20 mm × 1.6 mm, built on material substrate (FR-4) with a relative permittivity of εr{\varepsilon }_{{\rm{r}}} = 4.4. Two switches allow frequency reconfiguration in the antenna, giving us three operation modes. The design in mode 1 (SW1 = Off and SW2 = Off) covers a 4.6 GHz band. The proposed design in mode 2 resonated at 2.7 and 4.8 GHz (SW1 = On, SW2 = Off or SW1 = Off, SW2 = On), while the design in mode 3 operated at 3.6 GHz (SW1 = On, SW2 = On). Before fabrication, the proposed design is simulated by the Computer Simulation Technology microwave studio software. The presentation and discussion of the radiated pattern and S parameter demonstrate the practicability of the proposed design. The design module’s dimensions and performance are both precisely appropriate. The results indicate a good agreement between both simulation and experimental findings.
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