Kyriakos Neophytou, Kypros M. Kossifos, Marco A. Antoniades
{"title":"使用NRI-TL超材料的增加增益圆极化零波束斜视漏波天线","authors":"Kyriakos Neophytou, Kypros M. Kossifos, Marco A. Antoniades","doi":"10.1049/mia2.70032","DOIUrl":null,"url":null,"abstract":"<p>The theory, design and experimental validation of a circularly polarised (CP) metamaterial fixed-beam leaky-wave antenna (LWA) with zero beam-squinting (ZBS) is presented in this paper. It consists of two oppositely directed negative-refractive-index transmission-line (NRI-TL) LWAs, which are fed through an NRI-TL 180<span></span><math>\n <semantics>\n <mrow>\n <mo>°</mo>\n </mrow>\n <annotation> ${}^{\\circ}$</annotation>\n </semantics></math> balun. Each NRI-TL LWA generates its own beam and when the two beams, which radiate is opposite directions, are combined, they produce a fixed-beam over a wide zero beam-squinting bandwidth. This NRI-TL 180<span></span><math>\n <semantics>\n <mrow>\n <mo>°</mo>\n </mrow>\n <annotation> ${}^{\\circ}$</annotation>\n </semantics></math> balun is specifically implemented to achieve CP radiation with enhanced gain at the broadside direction. Therefore, a detailed analysis of the NRI-TL 180<span></span><math>\n <semantics>\n <mrow>\n <mo>°</mo>\n </mrow>\n <annotation> ${}^{\\circ}$</annotation>\n </semantics></math> balun is presented. Finally, the measurement results of a realised broadside circularly polarised fixed-beam LWA are presented and discussed. It is shown that the addition of the NRI-TL balun doubles the gain of the metamaterial LWA, since both orthogonal components, both co- and cross-polarisations are utilised providing CP and enhanced radiation gain and efficiency. The antenna's beam-squinting bandwidth is approximately 0.9 GHz, accompanied by an axial ratio of around 1.3 and exhibits an average radiation efficiency of 80<span></span><math>\n <semantics>\n <mrow>\n <mi>%</mi>\n </mrow>\n <annotation> $\\%$</annotation>\n </semantics></math>.</p>","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"19 1","pages":""},"PeriodicalIF":1.1000,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.70032","citationCount":"0","resultStr":"{\"title\":\"A Circularly Polarised Zero Beam-Squinting Leaky-Wave Antenna With Increased Gain Using NRI-TL Metamaterials\",\"authors\":\"Kyriakos Neophytou, Kypros M. Kossifos, Marco A. Antoniades\",\"doi\":\"10.1049/mia2.70032\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The theory, design and experimental validation of a circularly polarised (CP) metamaterial fixed-beam leaky-wave antenna (LWA) with zero beam-squinting (ZBS) is presented in this paper. It consists of two oppositely directed negative-refractive-index transmission-line (NRI-TL) LWAs, which are fed through an NRI-TL 180<span></span><math>\\n <semantics>\\n <mrow>\\n <mo>°</mo>\\n </mrow>\\n <annotation> ${}^{\\\\circ}$</annotation>\\n </semantics></math> balun. Each NRI-TL LWA generates its own beam and when the two beams, which radiate is opposite directions, are combined, they produce a fixed-beam over a wide zero beam-squinting bandwidth. This NRI-TL 180<span></span><math>\\n <semantics>\\n <mrow>\\n <mo>°</mo>\\n </mrow>\\n <annotation> ${}^{\\\\circ}$</annotation>\\n </semantics></math> balun is specifically implemented to achieve CP radiation with enhanced gain at the broadside direction. Therefore, a detailed analysis of the NRI-TL 180<span></span><math>\\n <semantics>\\n <mrow>\\n <mo>°</mo>\\n </mrow>\\n <annotation> ${}^{\\\\circ}$</annotation>\\n </semantics></math> balun is presented. Finally, the measurement results of a realised broadside circularly polarised fixed-beam LWA are presented and discussed. It is shown that the addition of the NRI-TL balun doubles the gain of the metamaterial LWA, since both orthogonal components, both co- and cross-polarisations are utilised providing CP and enhanced radiation gain and efficiency. The antenna's beam-squinting bandwidth is approximately 0.9 GHz, accompanied by an axial ratio of around 1.3 and exhibits an average radiation efficiency of 80<span></span><math>\\n <semantics>\\n <mrow>\\n <mi>%</mi>\\n </mrow>\\n <annotation> $\\\\%$</annotation>\\n </semantics></math>.</p>\",\"PeriodicalId\":13374,\"journal\":{\"name\":\"Iet Microwaves Antennas & Propagation\",\"volume\":\"19 1\",\"pages\":\"\"},\"PeriodicalIF\":1.1000,\"publicationDate\":\"2025-07-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.70032\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Iet Microwaves Antennas & Propagation\",\"FirstCategoryId\":\"94\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1049/mia2.70032\",\"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}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Iet Microwaves Antennas & Propagation","FirstCategoryId":"94","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1049/mia2.70032","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}
A Circularly Polarised Zero Beam-Squinting Leaky-Wave Antenna With Increased Gain Using NRI-TL Metamaterials
The theory, design and experimental validation of a circularly polarised (CP) metamaterial fixed-beam leaky-wave antenna (LWA) with zero beam-squinting (ZBS) is presented in this paper. It consists of two oppositely directed negative-refractive-index transmission-line (NRI-TL) LWAs, which are fed through an NRI-TL 180 balun. Each NRI-TL LWA generates its own beam and when the two beams, which radiate is opposite directions, are combined, they produce a fixed-beam over a wide zero beam-squinting bandwidth. This NRI-TL 180 balun is specifically implemented to achieve CP radiation with enhanced gain at the broadside direction. Therefore, a detailed analysis of the NRI-TL 180 balun is presented. Finally, the measurement results of a realised broadside circularly polarised fixed-beam LWA are presented and discussed. It is shown that the addition of the NRI-TL balun doubles the gain of the metamaterial LWA, since both orthogonal components, both co- and cross-polarisations are utilised providing CP and enhanced radiation gain and efficiency. The antenna's beam-squinting bandwidth is approximately 0.9 GHz, accompanied by an axial ratio of around 1.3 and exhibits an average radiation efficiency of 80.
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.
Current Special Issue. Call for papers:
Metrology for 5G Technologies - https://digital-library.theiet.org/files/IET_MAP_CFP_M5GT_SI2.pdf
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
