학술논문
Design of a Dual-Band Antenna System for LTE-M and LTE-MIMO by Exploiting the Characteristic Mode Theory
Document Type
Report
Source
Progress In Electromagnetics Research M. June 2020, Vol. 93 , p11, 11 p.
Subject
Language
English
ISSN
1937-8726
Abstract
In this article, a compact dual-band antenna system for LTE-M (700-900 MHz) and LTE-2500 dedicated to mobile handsets is presented. The system consists of a dual-band Planar Inverted-F Antenna (PIFA) for LTE-M and LTE-2500 bands where this designed PIFA is frequency reconfigurable in the LTE-M band. Additionally, another PIFA is designed to cover the LTE-2500 band to enable Multiple-Input-Multiple-Output (MIMO) communication for this band. Frequency reconfiguration between 700 MHz and 900 MHz is performed by a varactor diode biased from the RF port using a decoupling circuit to separate DC and RF signals. The compactness of the system and the good isolation between the two antennas were obtained thanks to the study of the characteristic modes of the mobile phone chassis, where the ideal positions of the antennas can be easily obtained. A prototype of our system was fabricated where good frequency reconfiguration and good MIMO performance (TARC and envelope correlation) were achieved.
1. INTRODUCTION Since the advent of the internet-of-things (IoT) around 2009 [1], this Machine-to-Machine technology which operates in sub-1 GHz frequency bands [2] and using Low-Power Wide-Area (LPWA) networks has [...]
1. INTRODUCTION Since the advent of the internet-of-things (IoT) around 2009 [1], this Machine-to-Machine technology which operates in sub-1 GHz frequency bands [2] and using Low-Power Wide-Area (LPWA) networks has [...]