Design of Reconfigurable Planar Inverted F Antenna for 5G Implementation

5G technology is expected to be the future of wireless communication to replace its predecessors. Some countries already did some researches to find suitable frequency bands for the 5G. Frequency around 3.5GHz and 4.8GHz are considered to implement 5G. To support the technology, a suitable antenna is needed. The antenna needs to work at 5G frequency bands and need to be as small as possible to be mounted at the rear of the mobile handset. Planar inverted F Antenna is a common type of antenna for mobile handset because of its compactness and low profile. The objective of this paper is to design a planar inverted F antenna that works at 5G frequency bands. It is designed on FR4 substrate with h = 1.6mm and dielectric constant ε _r = 4.3. The patch is placed 5mm above the ground plane and connected by the shorting plate at the edge of the patch and ground plane. An extended V patch is added to get the lower frequency band. The main patch and extended patch is connected by a lumped element which represents the PIN diode which will work as a switch to achieve the reconfigurable state of the antenna. After simulated, the antenna is fabricated and measured. The results show that the antenna works fine at both 3.5GHz and 4.8GHz while radiation pattern shows a unidirectional pattern that mainly aimed at the top of the patch. The antenna design, return loss, radiation pattern, and gain are presented in this paper.