Wideband Omnidirectional Antenna Featuring Small Azimuthal Gain Variation
Wideband omnidirectional antennas are essential components in radio monitoring and communication systems, enabling the reception of signals from all directions over a wide bandwidth. This paper presents a novel wideband omnidirectional antenna design that achieves a 1-dB gain variation across its az...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-12-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/14/12/2218 |
| _version_ | 1797380030078124032 |
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| author | Honglin Zhang Zhenzhan Fu Binjie Hu Zhijian Chen Shaowei Liao Bing Li |
| author_facet | Honglin Zhang Zhenzhan Fu Binjie Hu Zhijian Chen Shaowei Liao Bing Li |
| author_sort | Honglin Zhang |
| collection | DOAJ |
| description | Wideband omnidirectional antennas are essential components in radio monitoring and communication systems, enabling the reception of signals from all directions over a wide bandwidth. This paper presents a novel wideband omnidirectional antenna design that achieves a 1-dB gain variation across its azimuthal plane within a bandwidth of 1.8 GHz to 7.77 GHz. The antenna’s exceptional performance is attributed to two flower-bud-shaped monopoles that, through pattern superposition, generate a wideband omnidirectional radiation pattern. Analysis shows that the use of a circular ground plane also reduces the azimuthal gain variation. Additionally, an embedded matching structure integrated into the antenna’s base enhances the impedance bandwidth without compromising its compact size. Analytical investigations demonstrate that the matching structure effectively behaves as a five-order LC circuit, explaining its wideband matching capabilities. Furthermore, structural modifications effectively reduce side lobe levels, ensuring minimal interference. Experimental measurements corroborate the antenna’s omnidirectional radiation pattern and confirm that the azimuthal gain variation remains within 1-dB throughout its bandwidth, while maintaining an S11 below −10 dB from 1.8 GHz to 7.7 GHz. The antenna’s bandwidth overlaps with the spectrum intensively used in mobile communication technologies, such as LTE, Bluetooth, and IEEE 802.11be, as well as radiolocation applications, making it a promising choice for unmanned aerial vehicles conducting communication and radio monitoring missions. |
| first_indexed | 2024-03-08T20:31:35Z |
| format | Article |
| id | doaj.art-0cd8782ab59942c19067df76a73bb843 |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-03-08T20:31:35Z |
| publishDate | 2023-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-0cd8782ab59942c19067df76a73bb8432023-12-22T14:25:26ZengMDPI AGMicromachines2072-666X2023-12-011412221810.3390/mi14122218Wideband Omnidirectional Antenna Featuring Small Azimuthal Gain VariationHonglin Zhang0Zhenzhan Fu1Binjie Hu2Zhijian Chen3Shaowei Liao4Bing Li5School of Electronic and Information Engineering, South China University of Technology, No. 381 Wushan Road, Guangzhou 510641, ChinaSchool of Microelectronics, South China University of Technology, No. 381 Wushan Road, Guangzhou 510641, ChinaSchool of Electronic and Information Engineering, South China University of Technology, No. 381 Wushan Road, Guangzhou 510641, ChinaSchool of Microelectronics, South China University of Technology, No. 381 Wushan Road, Guangzhou 510641, ChinaSchool of Electronic and Information Engineering, South China University of Technology, No. 381 Wushan Road, Guangzhou 510641, ChinaSchool of Electrical Engineering, Southwest Jiaotong University, Chengdu 611756, ChinaWideband omnidirectional antennas are essential components in radio monitoring and communication systems, enabling the reception of signals from all directions over a wide bandwidth. This paper presents a novel wideband omnidirectional antenna design that achieves a 1-dB gain variation across its azimuthal plane within a bandwidth of 1.8 GHz to 7.77 GHz. The antenna’s exceptional performance is attributed to two flower-bud-shaped monopoles that, through pattern superposition, generate a wideband omnidirectional radiation pattern. Analysis shows that the use of a circular ground plane also reduces the azimuthal gain variation. Additionally, an embedded matching structure integrated into the antenna’s base enhances the impedance bandwidth without compromising its compact size. Analytical investigations demonstrate that the matching structure effectively behaves as a five-order LC circuit, explaining its wideband matching capabilities. Furthermore, structural modifications effectively reduce side lobe levels, ensuring minimal interference. Experimental measurements corroborate the antenna’s omnidirectional radiation pattern and confirm that the azimuthal gain variation remains within 1-dB throughout its bandwidth, while maintaining an S11 below −10 dB from 1.8 GHz to 7.7 GHz. The antenna’s bandwidth overlaps with the spectrum intensively used in mobile communication technologies, such as LTE, Bluetooth, and IEEE 802.11be, as well as radiolocation applications, making it a promising choice for unmanned aerial vehicles conducting communication and radio monitoring missions.https://www.mdpi.com/2072-666X/14/12/2218omnidirectional antennawidebandimpedance matchingpattern superposition |
| spellingShingle | Honglin Zhang Zhenzhan Fu Binjie Hu Zhijian Chen Shaowei Liao Bing Li Wideband Omnidirectional Antenna Featuring Small Azimuthal Gain Variation Micromachines omnidirectional antenna wideband impedance matching pattern superposition |
| title | Wideband Omnidirectional Antenna Featuring Small Azimuthal Gain Variation |
| title_full | Wideband Omnidirectional Antenna Featuring Small Azimuthal Gain Variation |
| title_fullStr | Wideband Omnidirectional Antenna Featuring Small Azimuthal Gain Variation |
| title_full_unstemmed | Wideband Omnidirectional Antenna Featuring Small Azimuthal Gain Variation |
| title_short | Wideband Omnidirectional Antenna Featuring Small Azimuthal Gain Variation |
| title_sort | wideband omnidirectional antenna featuring small azimuthal gain variation |
| topic | omnidirectional antenna wideband impedance matching pattern superposition |
| url | https://www.mdpi.com/2072-666X/14/12/2218 |
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