{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,30]],"date-time":"2026-05-30T01:54:16Z","timestamp":1780106056968,"version":"3.54.0"},"reference-count":28,"publisher":"World Scientific Pub Co Pte Ltd","issue":"17","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J CIRCUIT SYST COMP"],"published-print":{"date-parts":[[2022,11,30]]},"abstract":"<jats:p> This paper presents design and analysis of a beam switchable [Formula: see text] array patch antenna fed by a [Formula: see text] Butler matrix based hybrid coupler for 2.45[Formula: see text]GHz radio frequency identification (RFID) reader applications in the ISM band. The proposed beam switchable array antenna arrangement consists of two identical patch elements, a pleated quarter-wavelength impedance transformer (PQWIT), and a hybrid coupler. The concept of PQWIT has been utilized to reduce the overall implementation area of the patch elements. The overall area of the patch element is miniaturized by 50% due to the implementation of PQWIT. This miniaturized antenna is used as a radiating element for designing a beam switchable [Formula: see text] array antenna fed by a hybrid coupler. The proposed antenna prototype has been fabricated on a 1.56[Formula: see text]mm thick Rogers RT\/duroid 5880 substrate with a physical area of [Formula: see text][Formula: see text]mm<jats:sup>2<\/jats:sup>. The simulation and measured results exhibit good agreements. The designed antenna offers a broad bandwidth of 844[Formula: see text]MHz (1.956\u20132.80[Formula: see text]GHz), peak gain of 8.86 dB, peak radiation efficiency of 99.52% and has two switchable beams in the directions [Formula: see text] and [Formula: see text]. The suggested switched beam array antenna is suitable for RFID reader applications at 2.45[Formula: see text]GHz for tracking of moving objects. <\/jats:p>","DOI":"10.1142\/s0218126622503054","type":"journal-article","created":{"date-parts":[[2022,6,17]],"date-time":"2022-06-17T14:35:19Z","timestamp":1655476519000},"source":"Crossref","is-referenced-by-count":6,"title":["Design and Realization of a Broadband Multi-Beam 1\u00d72 Array Antenna Based on 2\u00d72 Butler Matrix for 2.45 GHz RFID Reader Applications"],"prefix":"10.1142","volume":"31","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9329-317X","authenticated-orcid":false,"given":"Abdelaaziz El","family":"Ansari","sequence":"first","affiliation":[{"name":"Signal, System and Component Laboratory, Sidi Mohamed Ben Abdellah University-FST, Fez 30000, Morocco"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sudipta","family":"Das","sequence":"additional","affiliation":[{"name":"Department of ECE, IMPS College of Engineering and Technology, Malda, West Bengal 732103, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ikram","family":"Tabakh","sequence":"additional","affiliation":[{"name":"Signal, System and Component Laboratory, Sidi Mohamed Ben Abdellah University-FST, Fez 30000, Morocco"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"B. 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