Performance Enhancement of a mmWave Antenna using Modified Series-Fed Array Structure

In this paper, a modified series-fed array antenna with wideband characteristics is presented for the 5G mmWave applications. Additional loaded patches in both the E-plane and H-plane of the proposed antenna offer wider bandwidth and high gain with side lobe suppression of the conventional rectangular series-fed antenna. The proposed antenna is simulated and fabricated on a 0.787 mm thick Rogers RT5880 substrate with an overall size of 16 mm × 16 mm. According to the results of both simulations and measurements, the suggested antenna has a broad operational bandwidth that ranges from 24.62 – 30.64 GHz, which corresponds to 21.78% of the central frequency. The antenna also offers unidirectional radiation patterns with a peak gain of 12.4 dBi. The proposed antenna is a viable option for 5G mmWave communications due to its complete set of performance features.