Performance Enhancement of Unconventional Slotted Waveguide Antenna Arrays at Ku Band

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

International Journal of Communication Systems Pub Date : 2025-01-07 DOI:10.1002/dac.6114

A. S. Keerthi Nayani, G. Manmadha Rao

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Abstract

Slotted waveguide antenna (SWA) arrays are highly valued for their compact structure, high power handling capability, directivity, and efficiency, making them ideal for advanced radar and communication systems. In broad-wall SWAs, side lobe levels (SLLs) are influenced by slot displacement from the waveguide centerline and slot inclination angles, impacting array performance. This paper introduces a novel design approach for meandered SWA arrays optimized as frequency scanning antennas (FSAs), achieving enhanced gain, scanning coverage, and SLL suppression. The design incorporates an innovative meandering feeding mechanism, significantly improving frequency scanning performance over the Ku band (15.1–16.5 GHz). The array includes 16 radiating slot elements paired with an E-plane horn antenna in elevation plane, narrowing beam width, and optimizing radiation control. Using the discrete Taylor distribution to meet SLL requirements, this approach effectively balances low SLL with high gain. Simulations conducted in CST Microwave Studio confirm the array's performance, showing 70° scanning coverage, over 21 dBi gain, and an SLL reduced to −21 dB. Both simulated and measured results designate that the proposed meandered SWA array architecture is appropriate for next-generation frequency scanning systems, offering a compact, power-efficient, and high-precision solution for demanding applications.

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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.