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The IER was generated using the peaking amplifier with the help of a desired impedance transformation in the low\u2010power region to enhance the back\u2010off efficiency of the carrier amplifier. To convert the impedances properly, both in the low\u2010power region and at saturation, a two\u2010impedance matching method was employed to design the output matching networks. For verification, a symmetric DPA with large back\u2010off power range over 2.2\u20132.5\u2009GHz was designed and fabricated. Measurement results show that the designed DPA has the 9\u2009dB back\u2010off efficiency of higher than 45%, while the saturated output power is higher than 44\u2009dBm over the whole operation bandwidth. When driven by a 20\u2009MHz LTE signal, the DPA can achieve good average efficiency of around 50% with adjacent channel leakage ratio of about \u201350\u2009dBc after linearization over the frequency band of interest. The linearity improvement of the DPA for multistandard wireless communication system was also verified with a dual\u2010band modulated signal.<\/jats:p>","DOI":"10.1155\/2018\/3968308","type":"journal-article","created":{"date-parts":[[2018,4,15]],"date-time":"2018-04-15T23:31:36Z","timestamp":1523835096000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["A Doherty Power Amplifier with Large Back\u2010Off Power Range Using Integrated Enhancing Reactance"],"prefix":"10.1155","volume":"2018","author":[{"given":"Wa","family":"Kong","sequence":"first","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6255-9297","authenticated-orcid":false,"given":"Jing","family":"Xia","sequence":"additional","affiliation":[]},{"given":"Fan","family":"Meng","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3710-460X","authenticated-orcid":false,"given":"Chao","family":"Yu","sequence":"additional","affiliation":[]},{"given":"Lixia","family":"Yang","sequence":"additional","affiliation":[]},{"given":"Xiaowei","family":"Zhu","sequence":"additional","affiliation":[]}],"member":"311","published-online":{"date-parts":[[2018,4,15]]},"reference":[{"key":"e_1_2_7_1_2","doi-asserted-by":"publisher","DOI":"10.1109\/JPROC.2012.2211091"},{"key":"e_1_2_7_2_2","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2011.2176695"},{"key":"e_1_2_7_3_2","doi-asserted-by":"publisher","DOI":"10.1109\/TMTT.2013.2253794"},{"key":"e_1_2_7_4_2","doi-asserted-by":"publisher","DOI":"10.1109\/TCSI.2013.2283781"},{"key":"e_1_2_7_5_2","doi-asserted-by":"publisher","DOI":"10.1049\/el.2014.2214"},{"key":"e_1_2_7_6_2","doi-asserted-by":"publisher","DOI":"10.1049\/iet-map.2015.0033"},{"key":"e_1_2_7_7_2","doi-asserted-by":"publisher","DOI":"10.1109\/MMM.2012.2226998"},{"key":"e_1_2_7_8_2","doi-asserted-by":"publisher","DOI":"10.2528\/PIER14011301"},{"key":"e_1_2_7_9_2","doi-asserted-by":"publisher","DOI":"10.1109\/MMM.2013.2288713"},{"key":"e_1_2_7_10_2","doi-asserted-by":"publisher","DOI":"10.1002\/mop.28854"},{"key":"e_1_2_7_11_2","doi-asserted-by":"publisher","DOI":"10.1109\/TMTT.2016.2623705"},{"key":"e_1_2_7_12_2","doi-asserted-by":"publisher","DOI":"10.1109\/TCSI.2017.2658689"},{"key":"e_1_2_7_13_2","doi-asserted-by":"publisher","DOI":"10.1049\/el.2010.1708"},{"key":"e_1_2_7_14_2","doi-asserted-by":"publisher","DOI":"10.1002\/mmce.20791"},{"key":"e_1_2_7_15_2","doi-asserted-by":"publisher","DOI":"10.1109\/LMWC.2016.2615004"},{"key":"e_1_2_7_16_2","doi-asserted-by":"publisher","DOI":"10.1109\/TCSII.2016.2609460"},{"key":"e_1_2_7_17_2","doi-asserted-by":"publisher","DOI":"10.1109\/TMTT.2014.2333713"},{"key":"e_1_2_7_18_2","doi-asserted-by":"publisher","DOI":"10.1109\/TMTT.2016.2529601"},{"key":"e_1_2_7_19_2","doi-asserted-by":"publisher","DOI":"10.1049\/iet-map.2017.0119"},{"key":"e_1_2_7_20_2","doi-asserted-by":"publisher","DOI":"10.1109\/TMTT.2017.2673822"},{"key":"e_1_2_7_21_2","doi-asserted-by":"publisher","DOI":"10.1109\/TMTT.2016.2574861"},{"key":"e_1_2_7_22_2","doi-asserted-by":"publisher","DOI":"10.1109\/TMTT.2015.2456901"},{"key":"e_1_2_7_23_2","doi-asserted-by":"publisher","DOI":"10.1109\/MMM.2016.2616185"},{"key":"e_1_2_7_24_2","doi-asserted-by":"crossref","unstructured":"GuoY.andZhuA. 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