Circularly Polarized Slots in T-Shape based Substrate Integrated Waveguide PIFA Antenna for 5G Applications

摘要

In this paper, circularly polarized substrate integrated waveguide (SIW) planar inverted-F antenna (PIFA) with slots in T-shape is presented. The main focus of this work is to achieve polarization diversity. The basic proposed PIFA antenna is linearly polarized with low gain. In order to obtain a low profile, compactness, high gain, the planar inverted-F antenna is integrated with SIW. The gain of the antenna is increased by inserting inductive metallic posts with different orientation into the substrate of the PIFA antenna. The transformation of linear polarization to circular polarization is done by deploying slots in T-shape on the upper surface of the substrate in a specific pattern. The dimension of the repeated slots is 0.02λ0 × 0.02λ0. The vertical shorting plate of the antenna acts as a dipole whose length is less than λ0/10. Besides that, a shorting plate is used to balance the polarization as well as maintained the bandwidth. The proposed antenna shows good performance over the frequency range for 5G applications.