Bandwidth enhancement using a slot‐inverted F hybrid antenna for metal frame devices | Zendy

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Bandwidth enhancement using a slot‐inverted F hybrid antenna for metal frame devices

Author(s) -

Kim Jae Hee

Publication year - 2020

Publication title -

microwave and optical technology letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.304

H-Index - 76

eISSN - 1098-2760

pISSN - 0895-2477

DOI - 10.1002/mop.32377

Subject(s) - antenna measurement , antenna factor , antenna efficiency , bandwidth (computing) , coaxial antenna , antenna noise temperature , slot antenna , omnidirectional antenna , acoustics , physics , electronic engineering , electrical engineering , computer science , engineering , antenna (radio) , telecommunications

For a wireless communication device surrounded by a metal frame, a slot antenna is required to ensure antenna performance. However, the closed slot antenna, which is blocked by metal on all sides, has a disadvantage of narrow bandwidth when the aperture size is small. In this study, a method for widening the bandwidth by integrating the closed slot antenna with an inverted F antenna is proposed herein. Using this method, the inverted F antenna is mounted on the slot antenna, and the feeding structure is set up to merge the resonance frequencies of the two antennas. The proposed antenna is fabricated and is measured to have a bandwidth of 450 MHz (2.3 to 2.75 GHz) at 2.4 GHz for S 11 < −10 dB. The measured efficiency is over 75% in this frequency band. The proposed method is expected to be used to widen the bandwidth of antennas for metal‐framed devices with insufficient antenna mounting space.

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