Feasibility Study of 4G Cellular Antennas for Eyewear Communicating Devices

• Published in: IEEE antennas and wireless propagation letters Vol. 12; pp. 1704 - 1707
• Main Authors: Cihangir, Aykut, Whittow, Will G., Panagamuwa, Chinthana J., Ferrero, Fabien, Jacquemod, Gilles, Gianesello, Frederic, Luxey, Cyril
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-01-2013; The Institute of Electrical and Electronics Engineers, Inc. (IEEE); Institute of Electrical and Electronics Engineers
• Subjects: Antennas; Bands; Cellular; Circuit boards; Coupling element; Electromagnetism; Engineering Sciences; Eyewear; Feasibility studies; GSM; LTE; Mobile antennas; Mobile handsets; Phantoms; Printed circuits; Prototypes; SAR; Specific absorption rate; PCS; human-head model; SAR; Mobile antennas; printed circuits; Mobile handsets; capacitive coupling element; reflection coefficient; Prototypes; Phantoms; electromagnetic wave reflection; UHF antennas; Long Term Evolution; GSM; PCB substrate; frequency 700 MHz to 960 MHz; Coupling element; eyewear; WLAN2400 standard; printed circuit board; Specific absorption rate; wirelessly connected eyewear; Standards; 4G mobile communication; DCS; SAR value; eyewear communicating device; 1-g standard; frequency 1.7 GHz to 2.7 GHz; 4G cellular antenna; LTE; wireless LAN; cellular radio
• ISSN: 1536-1225; 1548-5757
• DOI: 10.1109/LAWP.2013.2287204

A feasibility study of 4G cellular antennas operating in the LTE, GSM, DCS, PCS, and WLAN2400 standards for wirelessly connected eyewear is presented. The target bands are 700-960 MHz and 1.7-2.7 GHz. The antenna designs are capacitive coupling element types, with simple layout printed on one side of the printed circuit board (PCB) substrate. Three different antennas are examined in terms of obtainable bandwidth potential, reflection coefficient, and specific absorption rate (SAR) values considering two human-head models (SAM and Visible Human). The best antenna is -6 dB matched and has radiation efficiencies around 14% and 36% in respectively low and high frequency bands. Based on simulation data, SAR values could be above the 1-g standards.