{"title":"Feeding-line-based decoupling patch antennas","authors":"Hui Gu, Hang Qi, Yue Zhao, Lei Ge, Wenjing Zhang","doi":"10.1049/mia2.12484","DOIUrl":null,"url":null,"abstract":"<p>Mutual coupling among multiple antennas has been a problem needed to be tackled in multiple-input-multiple-output (MIMO) systems. A decoupling method based on short decoupling feeding lines (DFLs) for MIMO patch antennas is proposed. The decoupling method utilises the feeding transmission line to create a new coupling path between the closely placed patch antennas. By adjusting the intensity and phase of the introduced new coupling, the original coupling can be cancelled out. The proposed method can realise both E- and H-plane decoupling. A 1 × 2 H-plane MIMO patch antenna array is first presented to explain the decoupling mechanism. Then, two practical examples of 2 × 2 and 4 × 4 MIMO patch antenna arrays are designed, fabricated and measured. The results indicate that the port isolation can be apparently improved from 15 to 38 dB for H-plane coupling and from 19 to 35 dB for E-plane coupling at the centre frequency of 3.5 GHz. Moreover, the proposed method is promising to be applied in arrays with other antenna type by adjusting the position and size of short DFLs.</p>","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 8","pages":"593-600"},"PeriodicalIF":1.1000,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12484","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Iet Microwaves Antennas & Propagation","FirstCategoryId":"94","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1049/mia2.12484","RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
Mutual coupling among multiple antennas has been a problem needed to be tackled in multiple-input-multiple-output (MIMO) systems. A decoupling method based on short decoupling feeding lines (DFLs) for MIMO patch antennas is proposed. The decoupling method utilises the feeding transmission line to create a new coupling path between the closely placed patch antennas. By adjusting the intensity and phase of the introduced new coupling, the original coupling can be cancelled out. The proposed method can realise both E- and H-plane decoupling. A 1 × 2 H-plane MIMO patch antenna array is first presented to explain the decoupling mechanism. Then, two practical examples of 2 × 2 and 4 × 4 MIMO patch antenna arrays are designed, fabricated and measured. The results indicate that the port isolation can be apparently improved from 15 to 38 dB for H-plane coupling and from 19 to 35 dB for E-plane coupling at the centre frequency of 3.5 GHz. Moreover, the proposed method is promising to be applied in arrays with other antenna type by adjusting the position and size of short DFLs.
多天线之间的相互耦合一直是多输入多输出（MIMO）系统需要解决的问题。本文提出了一种基于短去耦馈线（DFL）的 MIMO 贴片天线去耦方法。该去耦方法利用馈电传输线在紧密贴片天线之间创建新的耦合路径。通过调整引入的新耦合的强度和相位，可以消除原来的耦合。所提出的方法既能实现 E 平面去耦，也能实现 H 平面去耦。首先介绍一个 1 × 2 H 平面 MIMO 贴片天线阵列来解释去耦机制。然后，设计、制造和测量了 2 × 2 和 4 × 4 MIMO 贴片天线阵列的两个实际例子。结果表明，在中心频率为 3.5 GHz 时，H 平面耦合的端口隔离度可从 15 dB 明显提高到 38 dB，E 平面耦合的端口隔离度可从 19 dB 提高到 35 dB。此外，通过调整短 DFL 的位置和尺寸，该方法有望应用于其他类型的天线阵列。
期刊介绍：
Topics include, but are not limited to:
Microwave circuits including RF, microwave and millimetre-wave amplifiers, oscillators, switches, mixers and other components implemented in monolithic, hybrid, multi-chip module and other technologies. Papers on passive components may describe transmission-line and waveguide components, including filters, multiplexers, resonators, ferrite and garnet devices. For applications, papers can describe microwave sub-systems for use in communications, radar, aerospace, instrumentation, industrial and medical applications. Microwave linear and non-linear measurement techniques.
Antenna topics including designed and prototyped antennas for operation at all frequencies; multiband antennas, antenna measurement techniques and systems, antenna analysis and design, aperture antenna arrays, adaptive antennas, printed and wire antennas, microstrip, reconfigurable, conformal and integrated antennas.
Computational electromagnetics and synthesis of antenna structures including phased arrays and antenna design algorithms.
Radiowave propagation at all frequencies and environments.
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