A wideband omnidirectional dipole antenna with parasitic loop based on multi-resonant modes

IF 0.6 4区 工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC Electromagnetics Pub Date : 2023-07-04 DOI:10.1080/02726343.2023.2244832
Yanfeng Geng, Huihui Gao, G. Han, L. Han, H. Yuan, Wenmei Zhang
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Abstract

ABSTRACT A wideband omnidirectional dipole antenna with parasitic loop based on multi-resonant modes is proposed for WLAN, 5 G Sub-6 GHz, and RFID applications. The antenna is composed of a regular dipole with co-planar strips and a parasitic loop with four U-shaped branches. A regular dipole with co-planar strips is used to generate two resonant modes, and the parasitic loop around it generates another two resonant modes. By combining these four resonant modes, a wideband characteristic is achieved. In order to reduce the cross-polarization, four U-shaped branches are introduced, and then the cross-polarization levels are decreased from −2 dB to −13 dB. A prototype with a compact size of 0.6λ0 ×0.56λ0 ×0.012λ0 (λ0 is the wavelength in free space at center frequency) is fabricated and tested. Measurement shows that effective bandwidth is 1.8–5.6 GHz (102.7%), the measured gain variation is only 1.3 dBi, and omnidirectional radiation patterns are achieved over the operating band.
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基于多谐振模式的宽带全向寄生环偶极子天线
摘要提出了一种基于多谐振模式的带寄生环的宽带全向偶极天线,用于WLAN,5 G Sub-6 GHz和RFID应用。该天线由一个具有共面条带的规则偶极子和一个具有四个U形分支的寄生环组成。具有共面条带的规则偶极子用于产生两种谐振模式,其周围的寄生环产生另外两种谐振模。通过组合这四种谐振模式,实现了宽带特性。为了减少交叉极化,引入了四个U形分支,然后将交叉极化水平从−2降低 dB至−13 dB。制作并测试了一个紧凑尺寸为0.6λ0×0.56λ0×0.012λ0(λ0是中心频率下自由空间中的波长)的原型。测量表明,有效带宽为1.8–5.6 GHz(102.7%),测量的增益变化仅为1.3dBi,并且在工作频带上实现了全向辐射方向图。
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来源期刊
Electromagnetics
Electromagnetics 工程技术-工程:电子与电气
CiteScore
1.60
自引率
12.50%
发文量
31
审稿时长
6 months
期刊介绍: Publishing eight times per year, Electromagnetics offers refereed papers that span the entire broad field of electromagnetics and serves as an exceptional reference source of permanent archival value. Included in this wide ranging scope of materials are developments in electromagnetic theory, high frequency techniques, antennas and randomes, arrays, numerical techniques, scattering and diffraction, materials, and printed circuits. The journal also serves as a forum for deliberations on innovations in the field. Additionally, special issues give more in-depth coverage to topics of immediate importance. All submitted manuscripts are subject to initial appraisal by the Editor, and, if found suitable for further consideration, to peer review by independent, anonymous expert referees. Submissions can be made via email or postal mail.
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