LTE MIMO antenna using unbroken metallic rim and non resonant CCE element

Abstract

This paper presents a new two-element multiple input multiple output (MIMO) antenna for LTE application using an unbroken metallic rim as the primary antenna and a non-resonant capacitive coupling element (CCE) as a diversity antenna. The primary antenna covers 698-960 MHz and 1710-2690 MHz and the diversity antenna cover 1710-2690 MHz Average efficiencies above 70% and 50% have been achieved by the metallic rim antenna and non-resonant CCE respectively. A trapezoidal shaped feed is used to improve the high band performance. The unbroken metallic rim provides extra mechanical stability to mobile phones and saves the antenna space. Good isolation between the antenna elements has also been achieved. Both antennas are optimized by efficient matching circuits and conform to the requirements of ultra slim modern mobile phones. Index Terms-4G, MIMO, CCE, non-resonant antenna, characteristic mode,.I.

Metal-Covered Handset With Lte Mimo, Wi-Fi Mimo, and GPS Antennas

“…Problems caused by the increased amount of metal have been countered by new type of antennas that are integrated into the housing structure [1][2][3][4][5][6][7]. Previous studies have shown promising performance with different antenna configurations.…”

“…The first solutions include only metallic side frame. Grounding the frame from few locations creates a dual-loop antenna [1,2], which excites several resonant modes. Loop antennas generally have been a popular choice as presented in [3][4][5]9].…”