{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,7,30]],"date-time":"2025-07-30T13:16:35Z","timestamp":1753881395509,"version":"3.41.2"},"reference-count":11,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2018,4,10]],"date-time":"2018-04-10T00:00:00Z","timestamp":1523318400000},"content-version":"vor","delay-in-days":99,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Wireless Communications and Mobile Computing"],"published-print":{"date-parts":[[2018,1]]},"abstract":"<jats:p>A new microstrip balun bandpass filter (BPF) with wide stopband is presented. It is realized by utilizing the out\u2010of\u2010phase feature of standing\u2010wave distribution on a half\u2010wavelength (<jats:italic>\u03bb<\/jats:italic>\/2) open\u2010ended microstrip line and the resonant characteristics of the triple\u2010mode resonators. For demonstration, a prototype balun BPF operating at central frequency (<jats:italic>f<\/jats:italic><jats:sub>0<\/jats:sub>) of 2.34\u2009GHz with fractional bandwidth (FBW) of about 16.7% is designed. The presented balun BPF not only exhibits nice balanced response with 0.47\u2009dB magnitude imbalance and 4.3\u00b0 phase difference but also achieves 30\u2010dB harmonic suppression up to 6.40\u2009GHz (2.7<jats:italic>f<\/jats:italic><jats:sub>0<\/jats:sub>). Afterward, this presented design is embedded into a balanced quasi\u2010Yagi antenna to obtain high\u2010selective radiation and wide stopband rejection. Experimental results of the implemented antenna indicate less than \u221210\u2009dB reflection coefficient, 4.49\u20135.38\u2009dBi gain, and 12.71\u201319.62\u2009dB front\u2010to\u2010back ratio within the operating bandwidth.<\/jats:p>","DOI":"10.1155\/2018\/4725072","type":"journal-article","created":{"date-parts":[[2018,4,10]],"date-time":"2018-04-10T23:35:25Z","timestamp":1523403325000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["A Wide Stopband Balun Bandpass Filter with Its Application to Balanced Quasi\u2010Yagi Antenna"],"prefix":"10.1155","volume":"2018","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4305-2567","authenticated-orcid":false,"given":"Gang","family":"Zhang","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhenyao","family":"Qian","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5695-4119","authenticated-orcid":false,"given":"Yushou","family":"Chen","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8598-9249","authenticated-orcid":false,"given":"Yang","family":"Zhao","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2018,4,10]]},"reference":[{"key":"e_1_2_6_1_2","doi-asserted-by":"crossref","unstructured":"LiuX. 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