A compact circularly polarized (CP) substrate integrated waveguide (SIW) cavity-backed antenna with controlled axial ratio

IF 1.7 4区计算机科学 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

International Journal of Communication Systems Pub Date : 2024-08-15 DOI:10.1002/dac.5951

Shankaragouda M. Patil, Rajeshkumar Venkatesan

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Abstract

A new circular cavity-backed slot antenna, which produces unidirectional radiation patterns, has been developed for wireless communication systems. The antenna utilizes substrate-integrated waveguide (SIW) technology to create a low-profile cavity. The metal cladding on top of the cavity has an engraved circular ring slot for radiation, and a microstrip transition feeding mechanism is used to excite the perturbed circular slot antenna element located away from the centre of the cavity. Two rectangular cuts, including slots and a shorted via probe, improve radiation performance and bandwidth matching by nearly −40 dB over the working frequency range. An optimized spacing of 0.6 mm is established between the patch centre and the input microstrip transition feed, which produces a circularly polarized (CP) wave. The antenna uses CP SIW technology to operate within a wide impedance bandwidth of 12.18% (10.02–11.31 GHz) below −10 dB and an ARBW of 320 MHz (10.40–10.72 GHz). Both experimental and simulated results agree on s-parameters, and the antenna's gain, axial ratio, and radiation patterns are consistent. With 7.45 dB CP gain and planar integration, the antenna radiates unidirectional, making it suitable for lightweight wireless broadband applications.

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具有可控轴向比的紧凑型圆极化（CP）基底集成波导（SIW）腔背天线

摘要为无线通信系统开发了一种能产生单向辐射模式的新型圆形腔背槽天线。该天线利用基底集成波导（SIW）技术创建了一个扁平腔体。空腔顶部的金属包层刻有用于辐射的圆形环槽，微带过渡馈电机制用于激励远离空腔中心的扰动圆形槽天线元件。包括槽和短路通孔探针在内的两个矩形切口在工作频率范围内提高了近 -40 dB 的辐射性能和带宽匹配。贴片中心与输入微带过渡馈电之间的优化间距为 0.6 毫米，可产生圆极化 (CP) 波。该天线采用 CP SIW 技术，阻抗带宽为 12.18%（10.02-11.31 GHz），低于 -10 dB，ARBW 为 320 MHz（10.40-10.72 GHz）。实验和模拟结果在 s 参数上一致，天线的增益、轴向比和辐射模式也一致。该天线具有 7.45 dB CP 增益和平面集成，可单向辐射，适用于轻型无线宽带应用。

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来源期刊

International Journal of Communication Systems 工程技术-电信学

CiteScore

5.90

自引率

9.50%

发文量

323

审稿时长

7.9 months

期刊介绍： The International Journal of Communication Systems provides a forum for R&D, open to researchers from all types of institutions and organisations worldwide, aimed at the increasingly important area of communication technology. The Journal''s emphasis is particularly on the issues impacting behaviour at the system, service and management levels. Published twelve times a year, it provides coverage of advances that have a significant potential to impact the immense technical and commercial opportunities in the communications sector. The International Journal of Communication Systems strives to select a balance of contributions that promotes technical innovation allied to practical relevance across the range of system types and issues. The Journal addresses both public communication systems (Telecommunication, mobile, Internet, and Cable TV) and private systems (Intranets, enterprise networks, LANs, MANs, WANs). The following key areas and issues are regularly covered: -Transmission/Switching/Distribution technologies (ATM, SDH, TCP/IP, routers, DSL, cable modems, VoD, VoIP, WDM, etc.) -System control, network/service management -Network and Internet protocols and standards -Client-server, distributed and Web-based communication systems -Broadband and multimedia systems and applications, with a focus on increased service variety and interactivity -Trials of advanced systems and services; their implementation and evaluation -Novel concepts and improvements in technique; their theoretical basis and performance analysis using measurement/testing, modelling and simulation -Performance evaluation issues and methods.