Design of a Triple-frequency Reconfigurable Antenna Using Higher-order Mode Impedance Matching
The electrically controlled variable elements are mostly used in traditional frequency reconfigurable antennas to con-struct the feed network,which result in complex design and processing.In addition,the use of electronic components reduces the radiation efficiency and makes the performance unstable.In this paper,a mechanically tuned frequency reconfigurable antenna with high-order mode impedance matching is proposed.In order to use a fixed feed network for impedance matching without adding any electrically controlled variable elements,the antenna works in the third-order mode in two lower frequency bands to increase the in-put impedance.The proposed design increases the stability of the performance,improves the radiation efficiency,reduces the com-plexity of antenna design and processing,and reduces the cost.The antenna has achieved good resonance in the three 5G applica-tion bands of 2.6 GHz,3.5 GHz and 4.9 GHz,and the radiation efficiency has basically reached 90%.
frequency reconfigurable antennamonopole antennafeed networkmulti-band antenna
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