中图分类号：TN015；TM925.54 文献标志码：A DOI: 10.16157/j.issn.0258-7998.268045 中文引用格式： 周子龙，梁家荣，谢拥军，等. 喇叭空馈的介质表面波波导均匀加热技术研究[J]. 电子技术应用，2026，52(7)：8-11. 英文引用格式： Zhou Zilong，Liang Jiarong，Xie Yongjun，et al. A study on uniform heating technology using air-fed dielectric surface waveguides with a horn antenna[J]. Application of Electronic Technique，2026，52(7)：8-11.
A study on uniform heating technology using air-fed dielectric surface waveguides with a horn antenna
1.School of Electronic Information Engineering， Beihang University；2.Guangdong Midea Kitchen Appliances Manufacturing Co.，Ltd.；3.Qianyuan Laboratory
Abstract： To address the non-uniform heating issue in conventional microwave ovens caused by cavity standing waves, this paper proposes and validates a novel uniform heating scheme based on an array of dielectric surface waveguides fed by a horn antenna in free space. The scheme utilizes a horn antenna to excite a symmetrically arranged dielectric surface waveguide array, which in turn launches surface waves within the cavity. Full-wave simulations demonstrate that at 2.45 GHz, the proposed scheme significantly enhances heating uniformity, with its spatial coverage of uniform heating zones substantially surpassing that of conventional direct-feed configurations. Furthermore, simulations performed on a compact microwave oven model under both no-load and loaded conditions (with 1 000 mL of water) show a uniform electric field distribution inside the cavity, high energy absorption efficiency, and a voltage standing wave ratio (VSWR) below 3 across the operating frequency band. This study provides an innovative technical pathway characterized by structural simplicity, high power capacity, and ease of engineering integration for solving the problem of microwave heating non-uniformity.
Key words : surface wave；dielectric surface waveguide；microwave oven；heating uniformity
