A compact planar inverted-F antenna with U-shaped strip for all-metal-shell handset application

Abstract

A compact dual‐band planar inverted‐F antenna (PIFA) with U‐shaped strip is proposed in this work for all‐metal‐shell mobile telephone application. As metal‐shell handsets are getting more and more popular nowadays, it raises a big challenge in antenna design as the metal‐shell associated with surrounding electronic components like front‐back‐cameras and telephone receiver would affect the antenna performance. This work provides an optional solution to alleviate this problem, where the metal shell of the handset and a U‐shaped strip are utilized as part of the antenna. The proposed antenna is able to generate radiation at 2.4 GHz for Wi‐Fi application with the help of the metal shell while using the U‐shaped strip can achieve a resonance at 1.575 GHz for GPS application. A prototype has been fabricated to verify the radiation performance in a practical handset test environment.

Multiband multiple‐input multiple‐output antenna with high isolation for future 5G smartphone applications

“…In this article, an eight‐port multiband 5G MIMO antenna with a high isolation is proposed for future 5G smartphone applications. High isolation is achieved by simultaneously using two decoupling techniques, that is, balanced mode excitation and neutralization line. The operation bands of the MIMO antenna array with S 11 lower than −6 dB are 2300 to 2400 MHz (low band) and 3300 to 3600 MHz (high band), which can fully cover the LTE bands 40 (2300‐2400 MHz)/42 (3400‐3600 MHz) and Chinese 5G band (3300‐3400 and 3400‐3600 MHz).…”