Skip to main content

A Compact and Low Profile Loop Antenna with Six Resonant Modes for LTE Smart phone

Xu, Hang, Wang, Hanyang, Gao, Steven, Zhou, Hai, Huang, Yi, Xu, Qian, Cheng, Yujian (2016) A Compact and Low Profile Loop Antenna with Six Resonant Modes for LTE Smart phone. IEEE Transactions on Antennas and Propagation, 64 (9). pp. 3743-3751. ISSN 0018-926X. (doi:10.1109/TAP.2016.2582919) (KAR id:55775)

PDF Author's Accepted Manuscript
Language: English

Download (1MB) Preview
[thumbnail of A Compact and Low Profile Loop Antenna with Six Resonant Modes for LTE Smart phone_H Xu.pdf]
This file may not be suitable for users of assistive technology.
Request an accessible format
Official URL


In this paper, a novel six-mode loop antenna covering 660-1100 MHz, 1710-3020 MHz, 3370-3900 MHz, and 5150-5850 MHz has been proposed for the application of Long Term Evolution (LTE) including the coming LTE in unlicensed spectrum (LTE-U) and LTE-Licensed Assisted Access (LTE-LAA). Loop antennas offer better user experience than conventional Planar Inverted-F Antennas (PIFA), Inverted-F Antennas (IFA), and monopole antennas because of their unique balanced modes (1?, 2?, …). However, the bandwidth of loop antennas is usually narrower than that of PIFA/IFA and monopole antennas due to these balanced modes. To overcome this problem, a novel monopole/dipole parasitic element, which operates at an unbalanced monopole-like 0.25? mode and a balanced dipole-like 0.5? mode, is first proposed for loop antennas to cover more frequency bands. Benefiting from the balanced mode, the proposed parasitic element is promising to provide better user experience than conventional parasitic elements. To the authors’ knowledge, the balanced mode for a parasitic element is reported for the first time. The proposed antenna is able to provide excellent user experience while solving the problem of limited bandwidth in loop antennas. To validate the concept, one prototype antenna with the size of 75×10×5 mm3 is designed, fabricated and measured. Both simulations and experimental results are presented and discussed. Good performance is achieved.

Item Type: Article
DOI/Identification number: 10.1109/TAP.2016.2582919
Uncontrolled keywords: Loop antennas, handset antennas, mobile antennas, multi-band antenna, LTE antenna, LTE-Unlicensed (LTE-U), LTE-Licensed Assisted Access (LTE-LAA),parasitic element.
Subjects: T Technology
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Engineering and Digital Arts
Depositing User: Tina Thompson
Date Deposited: 02 Jun 2016 13:39 UTC
Last Modified: 16 Feb 2021 13:35 UTC
Resource URI: (The current URI for this page, for reference purposes)
Xu, Hang:
Gao, Steven:
Cheng, Yujian:
  • Depositors only (login required):


Downloads per month over past year