Home >

news Help

Publication Information


Title
Japanese: 
English:A 3‐dB Quadrature WLP Coupler for 60 GHz Applications 
Author
Japanese: Hamid Kiumarsi, 伊藤 浩之, 石原 昇, 岡田 健一, 上道 雄介, 千葉 康人, 益一哉.  
English: Hamid Kiumarsi, Hiroyuki Ito, Noboru Ishihara, Kenichi Okada, Yusuke Uemichi, Yasuto Chiba, Kazuya Masu.  
Language English 
Journal/Book name
Japanese: 
English: 
Volume, Number, Page Vol. 1427       
Published date Apr. 1, 2012 
Publisher
Japanese: 
English: 
Conference name
Japanese: 
English:Materials Research Society Spring Meeting, MRS 2012 
Conference site
Japanese: 
English:San Franciso 
DOI https://doi.org/10.1557/opl.2012.1119
Abstract A 60 GHz tandem coupler using offset broadside coupled lines is proposed in a WLP (Wafer Level Packaging) technology. The fabricated coupler has a core chip area of 750 μm × 385 μm (0.288 mm2). The measured results show an insertion loss of 0.44 dB, an amplitude imbalance of 0.03 dB and a phase difference of 87.6° at 60 GHz. Also the measurement shows an insertion loss of less than 0.67 dB, an amplitude imbalance of less than 0.31 dB, a phase error of less than 3.7°, an isolation of more than 29.7 dB and a return loss of more than 27.9 dB at the input ant coupled ports and more than 14.3 dB at the direct and isolated ports over the frequency band of 57-66 GHz, covering 60 GHz band both in Japan and US. To the best of our knowledge the proposed coupler achieves the lowest ever reported insertion loss and amplitude imbalance for a 3-dB coupler on a silicon substrate. With its superior performance and lower cost compared to the CMOS counterparts, the proposed coupler is a suitable candidate for low-cost highperformance millimeter-wave systems.

©2007 Tokyo Institute of Technology All rights reserved.