L-Shaped Slot-Loaded Stepped-Impedance Microstrip Structure UWB Antenna
1
College of Information Engineering, Jimei University, Xiamen 361021, China
2
College of IoT Engineering, Jiangnan University, Wuxi 214122, China
*
Author to whom correspondence should be addressed.
Micromachines 2020, 11(9), 828; https://doi.org/10.3390/mi11090828
Received: 8 August 2020
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Revised: 27 August 2020
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Accepted: 31 August 2020
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Published: 31 August 2020
(This article belongs to the Special Issue Next Generation RFID Transponders)
A stepped planar microstrip structure is proposed and demonstrated as a candidate of the ultra-wideband (UWB) antenna in the paper. In the structure, two L-shaped slots are introduced into the rectangular microstrip patch to broaden the current path at both edges of the radiating patch. The impedance bandwidth of the antenna can be extended by using the stepped impedance resonator (SIR) structure at one end of the radiation patch and connecting with the feed line. The symmetrical two I-shaped slots are loaded on the SIR microstrip to improve in-band performance and further widen the operating band. The proposed new structure can have an improvement in the in-band characteristics while extending the operating bandwidth. A broadband impedance bandwidth of 2.39 GHz to 13.78 GHz at S11 < −10 dB is demonstrated based on the proposed novel structure. The reflection coefficient and radiation characteristics are characterized in the paper. The tiny antenna, with the benefit of small area 36 mm × 23 mm, shows potential applications in ultra-wideband communication systems, wireless energy harvesting systems, and other wireless systems.
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Keywords:
ultra-wideband antenna; step impedance; microstrip slot; voltage standing wave ratio (VSWR)
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MDPI and ACS Style
Ma, Z.H.; Jiang, Y.F. L-Shaped Slot-Loaded Stepped-Impedance Microstrip Structure UWB Antenna. Micromachines 2020, 11, 828. https://doi.org/10.3390/mi11090828
AMA Style
Ma ZH, Jiang YF. L-Shaped Slot-Loaded Stepped-Impedance Microstrip Structure UWB Antenna. Micromachines. 2020; 11(9):828. https://doi.org/10.3390/mi11090828
Chicago/Turabian StyleMa, Zhong H., and Yan F. Jiang. 2020. "L-Shaped Slot-Loaded Stepped-Impedance Microstrip Structure UWB Antenna" Micromachines 11, no. 9: 828. https://doi.org/10.3390/mi11090828
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