中圖分類號：TN015；TM925.54 文獻標志碼：A DOI: 10.16157/j.issn.0258-7998.268045 中文引用格式： 周子龍，梁家榮，謝擁軍，等. 喇叭空饋的介質表面波波導均勻加熱技術研究[J]. 電子技術應用，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
