Abstract
A shorted monopole antenna with coupled feed for LTE/WWAN mobile handset applications is described. The basic resonance of the shorted monopole combines with the resonance formed by the coupling between the coupling strip and the feeding pad to cover the LTE700, GSM850, and GSM900 bands. Both the feeding pad and the coupling strip operate with the shorting strip as a loop antenna. The resonance of the loop antenna and the harmonics of the shorted monopole combine to cover the GSM1800, GSM1900, UMTS, and LTE2300 bands. A stable and omnidirectional radiation pattern with reasonable gain has been observed over the operating bandwidth.
Highlights
Technological advancements and the diversity of needs in wireless communication are leading to the development of antennas for smaller, lighter, and more multifunctional mobile handsets [1]
Coupled-fed shorted monopoles covering the WWAN band and the LTE band have been developed. e LTE band covers LTE700 (698–798 MHz), LTE2300 (2300–2400 MHz), and LTE2500 (2500–2690 MHz) [5, 6]. ese monopoles operating in the WWAN/LTE bands are, respectively, a monopole with a tuning stub [5] and a monopole with a chip inductorloaded shorted strip [6]
A shorted monopole antenna with coupled feed for LTE/WWAN bands is proposed. e base resonance of the shorted monopole combines with the resonance formed by the coupling between the feeding pad and the coupling strip to include the LTE700, GSM850, and GSM900 bands. e loop antenna is formed by both the coupled feed structure and the shorting strip. e loop resonance and a harmonic element combine to cover the GSM1800, GSM1900, UMTS, and LTE2300 bands. erefore, the proposed structure covers the LTE700, LTE2300, GSM850, GSM900, GSM1800, GSM1900, and UMTS bands
Summary
Technological advancements and the diversity of needs in wireless communication are leading to the development of antennas for smaller, lighter, and more multifunctional mobile handsets [1]. E WWAN band covers the GSM850 (824–894 MHz), GSM900 (880–960 MHz), GSM1800 (1710–1880 MHz), GSM1900 (1850–1990 MHz), and UMTS (1920–2170 MHz) bands. Ese developed planar monopoles are, respectively, a monopole with coupled strips [2], a CPW-fed LI-shaped monopole [3], and a coupledfed shorted monopole [4]. Coupled-fed shorted monopoles covering the WWAN band and the LTE band have been developed. A shorted monopole antenna with coupled feed for LTE/WWAN bands is proposed. E base resonance of the shorted monopole combines with the resonance formed by the coupling between the feeding pad and the coupling strip to include the LTE700, GSM850, and GSM900 bands. E loop antenna is formed by both the coupled feed structure and the shorting strip. A shorted monopole antenna with coupled feed for LTE/WWAN bands is proposed. e base resonance of the shorted monopole combines with the resonance formed by the coupling between the feeding pad and the coupling strip to include the LTE700, GSM850, and GSM900 bands. e loop antenna is formed by both the coupled feed structure and the shorting strip. e loop resonance and a harmonic element combine to cover the GSM1800, GSM1900, UMTS, and LTE2300 bands. erefore, the proposed structure covers the LTE700, LTE2300, GSM850, GSM900, GSM1800, GSM1900, and UMTS bands
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