Vol. 66

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2016-07-19

Small-Size Coupled-Fed Two Opposite-Direction Spiral Branches for Handset Antenna

By Ping Wang and Can Cui
Progress In Electromagnetics Research C, Vol. 66, 87-95, 2016
doi:10.2528/PIERC16050501

Abstract

A compact coupled-fed monopole handset antenna with multi-frequency band operation is proposed in this paper. It occupies a no-ground space of only 26×14mm2, and two wideband operations can be achieved by the coupled-fed two opposite-direction spiral branches. The low frequency bands of LTE700 operation are achieved by two spiral branches' 0.25-wavelength monopole modes, which generate a dual-resonance mode at 740 and 780 MHz. At around high frequency ranges, a 0.25-wavelength monopole mode of a T-shaped monopole is generated at 1.75 GHz, and combined with two 0.75-wavelength high-order monopole modes of the left and right side spiral branches to cover the DCS1800/PCS1900/UMTS2100/LTE2300/2500 bands. In addition, the proposed antenna is easily printed on the dielectric surface of a low cost FR4 substrate, which makes it suitable for practical mobile applications. The proposed antenna is successfully simulated, fabricated, and measured to validate the design.

Citation


Ping Wang and Can Cui, "Small-Size Coupled-Fed Two Opposite-Direction Spiral Branches for Handset Antenna," Progress In Electromagnetics Research C, Vol. 66, 87-95, 2016.
doi:10.2528/PIERC16050501
http://jpier.org/PIERC/pier.php?paper=16050501

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