Low-Profile High-Power Microwave Termination With High Heat Dissipation Efficiency

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Affiliation of Author(s):[1] University of Electronic Science and Technology of China, EHF Key Laboratory of Science, School of Electronic Science and Engineering, Chengdu, 611731, China

Journal:IEEE Microwave and Wireless Technology Letters

Key Words:Rectangular waveguides - Wave energy conversion

Abstract:In this letter, a novel high-power, low-profile microwave termination (matched load) using water as a lossy material is proposed. The electromagnetic wave (EM wave) first transitions from a rectangular waveguide (RWG) to a low-profile substrate-integrated waveguide (SIW) and then further transitions to a water medium. Utilizing the high lossy property of water for high-frequency EM waves, the EM wave energy is effectively converted into heat. Through the water circulation thermal design, the heat can be effectively released. The design combines the advantages of the SIW structure with low profile characteristics while maintaining high power capacity. It also offers benefits, such as low cost, compact structure (2.11λ0 × 1.17λ0 × 0.09λ0), simple fabrication, and ease of assembly. Measurement results show that, within the frequency range of 7.85-9.58 GHz, the return loss is better than 20 dB, with a relative bandwidth of 20%. ? 2023 IEEE.

Document Type:Article in Press

ISSN No.:2771957X

Translation or Not:no