Printed dual‐feed triangular patch antenna disposed in a small notch in the handheld device system ground plane for LTE/WWAN operation

Abstract

A printed triangular patch antenna disposed in a small notch at one corner of the system ground plane of the handheld communication device such as the smartphone, tablet computer, and phone tablet for long term evolution/wireless wide area network (LTE/WWAN) operation is presented. The small notch has a size of 10 × 20 mm2 only, and two tips of the triangular patch disposed therein are in close proximity to two adjacent perpendicular edges of the notch. The two tips are the antenna's two feeds for achieving LTE/WWAN operation. Each tip can be connected to an ON/OFF switch (e.g., a PIN diode) such that the antenna can be controlled to be fed at either the first or the second tip. When fed at the first tip, the antenna will operate in a high‐frequency band (1710–2690 MHz) to cover the GSM1800/1900/UMTS/LTE2300/2500 operation. When fed at the second tip and aided by a matching circuit, the antenna will operate at a low‐frequency band (824–960 MHz) to cover the GSM850/900 operation. Design considerations of the proposed antenna are described. Parametric studies and experimental results of the antenna are presented and discussed. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2767–2773, 2013

Small-Size LTE/WWAN Tablet Device Antenna With Two Hybrid Feeds

“…The matching network in the direct feed also includes a series inductor which can compensate for large capacitance of the proposed antenna with a resonant length (about 40 mm, corresponding to about 0.1 wavelength at 750 MHz) much less than 0.25 wavelength in the lower band (698-960 MHz), thus resulting in a much reduced size for the antenna [10], [19]- [24].…”