{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,28]],"date-time":"2025-11-28T12:34:35Z","timestamp":1764333275814,"version":"build-2065373602"},"reference-count":34,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2023,3,2]],"date-time":"2023-03-02T00:00:00Z","timestamp":1677715200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["Grant 62201181"],"award-info":[{"award-number":["Grant 62201181"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>This paper presents a novel load modulation network to realize a broadband Doherty power amplifier (DPA). The proposed load modulation network consists of two generalized transmission lines and a modified coupler. A comprehensive theoretical analysis is carried out to explain the operation principles of the proposed DPA. The analysis of the normalized frequency bandwidth characteristic shows that a theoretical relative bandwidth of approximately 86% can be obtained across a normalized frequency range of 0.4\u20131.0. The complete design process that allows the design of the large-relative-bandwidth DPA based on derived parameter solutions is presented. A broadband DPA operating between 1.0 GHz and 2.5 GHz was fabricated for validation. Measurements demonstrate that the DPA can deliver an output power of 43.9\u201344.5 dBm with a drain efficiency of 63.7\u201371.6% in the 1.0\u20132.5 GHz frequency band at the saturation level. Moreover, a drain efficiency of 45.2\u201353.7% can be obtained at the 6 dB power back-off level.<\/jats:p>","DOI":"10.3390\/s23052767","type":"journal-article","created":{"date-parts":[[2023,3,3]],"date-time":"2023-03-03T02:03:08Z","timestamp":1677808988000},"page":"2767","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["A High-Relative-Bandwidth Doherty Power Amplifier with Modified Load Modulation Network for Wireless Communications"],"prefix":"10.3390","volume":"23","author":[{"given":"Haipeng","family":"Zhu","sequence":"first","affiliation":[{"name":"School of Electronics and Information, Hangzhou Dianzi University, Hangzhou 310018, China"}]},{"given":"Zhiwei","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Electronics and Information, Hangzhou Dianzi University, Hangzhou 310018, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9183-7820","authenticated-orcid":false,"given":"Chao","family":"Gu","sequence":"additional","affiliation":[{"name":"ECIT Institute, Queen\u2019s University Belfast, Belfast BT3 9DT, UK"}]},{"given":"Xuefei","family":"Xuan","sequence":"additional","affiliation":[{"name":"School of Electronics and Information, Hangzhou Dianzi University, Hangzhou 310018, China"}]}],"member":"1968","published-online":{"date-parts":[[2023,3,2]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"4559","DOI":"10.1109\/TMTT.2013.2281959","article-title":"Design of concurrent multiband Doherty power amplifiers for wireless applications","volume":"61","author":"Nghiem","year":"2013","journal-title":"IEEE Trans. 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