Bandwidth Enhancement of U-Slot Rectangular Antenna for 5G Base Station Communication System at 3.5 GHz

The antenna is one of the components of the Base Transceiver Station (BTS). The function of the antenna on the transmitter is as a device that can convert electrical energy from the transmission line into electromagnetic waves into free space. BTS is an important device that supports 5G wireless technology. Massive MIMO as the main technology of 5G. To support that a wideband designs using U-slot consists of slot cut in the patch center with the symmetric position has been designed and combined with rectangular microstrip antenna (RMSA). The advantage of U-slot position governs which higher order resonant modes contribute to the bandwidth enhancement. The performance of a microstrip patch antenna is highly dependent on the feeding technique. By using proximity coupled feed, we can have a larger thickness substrate, but we can trade this with excellent return loss values. This antenna design works at a frequency of 3.5 GHz, uses FR4 material, return loss is smaller than -10 dB and the detailed resonant mode-based study is presented. A bandwidth greater than 800 MHz (>30%) is obtained. With these results, it is hoped that this antenna design will be able to support the implementation of massive MIMO.