{"title":"A High-Isolation Duplexer With Mismatched Load Impedance for Integrated Sensing and Communication","authors":"Jingyun Lu, Lina Ma, Changzhan Gu, Junfa Mao","doi":"10.1109/LMWC.2022.3166259","DOIUrl":null,"url":null,"abstract":"A novel 2.4 GHz passive duplexer with mismatched load impedance and high isolation between transmitting (TX) and receiving (RX) is proposed for integrated sensing and communication (ISAC) applications. By adjusting the impedance of a canceling tuner located between the quadrature coupler and the antenna, the load impedance of the coupler is tactfully mismatched, which reflects a portion of the TX power with the desired amplitude and phase to cancel out the TX/RX leakage to achieve a high TX/RX isolation of >56 dB. In the meantime, by leveraging the quadrature nature of the quadrature coupler, the proposed duplexer makes it possible for the transceiver to operate at dual circularly polarized (CP) mode, which is beneficial for the polarization requirement of ISAC. The proposed duplexer is fully characterized and evaluated in the custom-designed communication and radar sensing systems, and the simulation and experimental results demonstrate the feasibility for ISAC applications.","PeriodicalId":13130,"journal":{"name":"IEEE Microwave and Wireless Components Letters","volume":"32 1","pages":"1127-1130"},"PeriodicalIF":2.9000,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Microwave and Wireless Components Letters","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1109/LMWC.2022.3166259","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
A novel 2.4 GHz passive duplexer with mismatched load impedance and high isolation between transmitting (TX) and receiving (RX) is proposed for integrated sensing and communication (ISAC) applications. By adjusting the impedance of a canceling tuner located between the quadrature coupler and the antenna, the load impedance of the coupler is tactfully mismatched, which reflects a portion of the TX power with the desired amplitude and phase to cancel out the TX/RX leakage to achieve a high TX/RX isolation of >56 dB. In the meantime, by leveraging the quadrature nature of the quadrature coupler, the proposed duplexer makes it possible for the transceiver to operate at dual circularly polarized (CP) mode, which is beneficial for the polarization requirement of ISAC. The proposed duplexer is fully characterized and evaluated in the custom-designed communication and radar sensing systems, and the simulation and experimental results demonstrate the feasibility for ISAC applications.
期刊介绍：
The IEEE Microwave and Wireless Components Letters (MWCL) publishes four-page papers (3 pages of text + up to 1 page of references) that focus on microwave theory, techniques and applications as they relate to components, devices, circuits, biological effects, and systems involving the generation, modulation, demodulation, control, transmission, and detection of microwave signals. This includes scientific, technical, medical and industrial activities. Microwave theory and techniques relates to electromagnetic waves in the frequency range of a few MHz and a THz; other spectral regions and wave types are included within the scope of the MWCL whenever basic microwave theory and techniques can yield useful results. Generally, this occurs in the theory of wave propagation in structures with dimensions comparable to a wavelength, and in the related techniques for analysis and design.
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