A novel coupled-line structure is proposed to design dual-band and high-power Gysel power dividers. Based on traditional even-and odd-mode technique, the analytical design theory is given and the electrical parameters analysis is provided. Four numerical examples are presented to demonstrate the flexible dual-band applications. A practical power divider operating at 1GHz and 2 GHz is designed. The calculated and full-wave simulated results verify our proposed idea.
Abstract. In this paper, a compact quad-band planar monopole antenna for IoT application is designed, fabricated and measured. Four desired resonant frequencies are achieved by an L-shape radiation element and a "paperclip" meander strip. The proposed antenna achieves resonant frequencies at 0.915/2.45/3.5/5.8GHz with a simple structure and a very compact size of radiation structure of 15.9×25mm 2 . The key parameters of strips and parasitic block in generating resonant frequencies and optimizing impedance matching are discussed in detail. Experimental results reveal stable radiation properties, and adequate impedance bandwidths, thus making it suitable for practical IoT applications in WSNs/LTE/WLAN/GSM bands.
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