Abstract
In this paper, a compact planar ultra-thin triple band antenna is introduced. The proposed antenna with three bands can cover the Galileo, GPS, Glonass, DCS, PCS, UMTS, LTE2400, LTE2500, WiMAX, and WLAN bands. The suggested antenna has a simple configuration, consisting of a monopole radiating element on top of the substrate, and a small ground at the bottom of the substrate. The triple band of the antenna is achieved by using complementary split-ring resonators and cutting some slots to optimize and widen the operating bands of the antenna. The antenna has a simple and compact configuration, and so it is cost effective. With the small total size of 35mm ×30mm×0.5 mm, it can be a good choice for portable ultra-thin wireless handsets, like smartwatches.
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