Viswanadh Raviteja Gudivada, Yi Huang, Elliot L. Bennett
{"title":"A passive beamforming hemispherical liquid antenna using a simple metal ball","authors":"Viswanadh Raviteja Gudivada, Yi Huang, Elliot L. Bennett","doi":"10.1049/mia2.12497","DOIUrl":null,"url":null,"abstract":"<p>The authors propose a novel yet simple way of passive beamforming using a liquid antenna. A hemispherical dielectric resonator antenna filled with a dielectric liquid is considered to realise the fundamental TE<sub>111</sub> mode, and a small, weighted metal ball is dropped inside the hemispherical container. This metal ball functions as a movable director and passively steers the realised fundamental mode of the DRA always towards the ground. The proposed design finds its applications in static-subject-based applications such as indoor base stations, and beam-stabilisation/pattern-correction works in case of dynamic-subject-based applications. The overall profile of the antenna is 0.60λ<sub>0</sub> × 0.60λ<sub>0</sub> × 0.19λ<sub>0</sub> targeting the ISM band at 2.4 GHz with decent efficiency and far-field characteristics. The working prototype is developed and experimentally verified.</p>","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":null,"pages":null},"PeriodicalIF":1.1000,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12497","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Iet Microwaves Antennas & Propagation","FirstCategoryId":"94","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1049/mia2.12497","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
The authors propose a novel yet simple way of passive beamforming using a liquid antenna. A hemispherical dielectric resonator antenna filled with a dielectric liquid is considered to realise the fundamental TE111 mode, and a small, weighted metal ball is dropped inside the hemispherical container. This metal ball functions as a movable director and passively steers the realised fundamental mode of the DRA always towards the ground. The proposed design finds its applications in static-subject-based applications such as indoor base stations, and beam-stabilisation/pattern-correction works in case of dynamic-subject-based applications. The overall profile of the antenna is 0.60λ0 × 0.60λ0 × 0.19λ0 targeting the ISM band at 2.4 GHz with decent efficiency and far-field characteristics. The working prototype is developed and experimentally verified.
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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