Abstract:
A novel slow-wave synthesized coplanar waveguide (CPW), namely, the uniplanar synthesized CPW, is investigated in this paper. Quasi-lumped CPW inductors and capacitors ar...Show MoreMetadata
Abstract:
A novel slow-wave synthesized coplanar waveguide (CPW), namely, the uniplanar synthesized CPW, is investigated in this paper. Quasi-lumped CPW inductors and capacitors are used in synthesizing the new slow-wave structure. The synthesis method, lumped equivalent-circuit model, and simulated and experimental results are discussed. The synthesized line, featuring excellent miniaturization capabilities, has a moderate quality factor. The slow wave factor is 7.5, while the unloaded quality factor is 30-60. By utilizing the synthesized CPW, three novel miniaturized coupled-line directional couplers are proposed and experimentally verified. With the help of even/odd-mode analysis, design charts are summarized for understanding of the developed miniaturized couplers. When compared with previous designs, the miniaturized couplers show comparable performance, but significantly reduced sizes. Additionally, they have quasi-square appearances, which are suitable for circuit integration in cascade connection.
Published in: IEEE Transactions on Microwave Theory and Techniques ( Volume: 58, Issue: 8, August 2010)

Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan
Chen-Cheng Wang was born in Keelung, Taiwan, in 1985. He received the B.S. and M.S. degrees in electrical engineering from the National Taiwan University of Science and Technology, Taipei, Taiwan, in 2007 and 2009, respectively.
In 2009, he joined the Advantech Company Ltd., Taipei, Taiwan, where he is involved in research and development of substitute military services. His research interests include microwave passive cir...Show More
Chen-Cheng Wang was born in Keelung, Taiwan, in 1985. He received the B.S. and M.S. degrees in electrical engineering from the National Taiwan University of Science and Technology, Taipei, Taiwan, in 2007 and 2009, respectively.
In 2009, he joined the Advantech Company Ltd., Taipei, Taiwan, where he is involved in research and development of substitute military services. His research interests include microwave passive cir...View more

Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan
Chi-Hui Lai (S'10) was born in Taichung, Taiwan, in 1985. He received the B.S. degree in communication engineering from Feng Chia University, Taichung, Taiwan, in 2007, the M.S. degree in electrical engineering from the National Taiwan University of Science and Technology, Taipei, Taiwan, in 2009, and is currently working toward the Ph.D. degree at the National Taiwan University of Science and Technology.
His research inte...Show More
Chi-Hui Lai (S'10) was born in Taichung, Taiwan, in 1985. He received the B.S. degree in communication engineering from Feng Chia University, Taichung, Taiwan, in 2007, the M.S. degree in electrical engineering from the National Taiwan University of Science and Technology, Taipei, Taiwan, in 2009, and is currently working toward the Ph.D. degree at the National Taiwan University of Science and Technology.
His research inte...View more

Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan
Tzyh-Ghuang Ma (S'00–M'06) was born in Taipei, Taiwan, in 1973. He received the B.S. and M.S. degrees in electrical engineering and Ph.D. degree in communication engineering from National Taiwan University, Taipei, Taiwan, in 1995, 1997, and 2005, respectively.
In 2005, he joined the faculty of the Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan, where he is curren...Show More
Tzyh-Ghuang Ma (S'00–M'06) was born in Taipei, Taiwan, in 1973. He received the B.S. and M.S. degrees in electrical engineering and Ph.D. degree in communication engineering from National Taiwan University, Taipei, Taiwan, in 1995, 1997, and 2005, respectively.
In 2005, he joined the faculty of the Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan, where he is curren...View more

Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan
Chen-Cheng Wang was born in Keelung, Taiwan, in 1985. He received the B.S. and M.S. degrees in electrical engineering from the National Taiwan University of Science and Technology, Taipei, Taiwan, in 2007 and 2009, respectively.
In 2009, he joined the Advantech Company Ltd., Taipei, Taiwan, where he is involved in research and development of substitute military services. His research interests include microwave passive circuit designs, RF identification (RFID), and mobile antenna designs.
Chen-Cheng Wang was born in Keelung, Taiwan, in 1985. He received the B.S. and M.S. degrees in electrical engineering from the National Taiwan University of Science and Technology, Taipei, Taiwan, in 2007 and 2009, respectively.
In 2009, he joined the Advantech Company Ltd., Taipei, Taiwan, where he is involved in research and development of substitute military services. His research interests include microwave passive circuit designs, RF identification (RFID), and mobile antenna designs.View more

Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan
Chi-Hui Lai (S'10) was born in Taichung, Taiwan, in 1985. He received the B.S. degree in communication engineering from Feng Chia University, Taichung, Taiwan, in 2007, the M.S. degree in electrical engineering from the National Taiwan University of Science and Technology, Taipei, Taiwan, in 2009, and is currently working toward the Ph.D. degree at the National Taiwan University of Science and Technology.
His research interests include miniaturized microwave circuit design and its system applications.
Chi-Hui Lai (S'10) was born in Taichung, Taiwan, in 1985. He received the B.S. degree in communication engineering from Feng Chia University, Taichung, Taiwan, in 2007, the M.S. degree in electrical engineering from the National Taiwan University of Science and Technology, Taipei, Taiwan, in 2009, and is currently working toward the Ph.D. degree at the National Taiwan University of Science and Technology.
His research interests include miniaturized microwave circuit design and its system applications.View more

Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan
Tzyh-Ghuang Ma (S'00–M'06) was born in Taipei, Taiwan, in 1973. He received the B.S. and M.S. degrees in electrical engineering and Ph.D. degree in communication engineering from National Taiwan University, Taipei, Taiwan, in 1995, 1997, and 2005, respectively.
In 2005, he joined the faculty of the Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan, where he is currently an Associate Professor. His research interests include miniaturized microwave circuit designs, ultra-wideband antennas, antenna arrays, and RF identification (RFID).
Dr. Ma was the recipient of the Poster Presentation Award presented at the 2008 International Workshop on Antenna Technology (iWAT), Chiba, Japan.
Tzyh-Ghuang Ma (S'00–M'06) was born in Taipei, Taiwan, in 1973. He received the B.S. and M.S. degrees in electrical engineering and Ph.D. degree in communication engineering from National Taiwan University, Taipei, Taiwan, in 1995, 1997, and 2005, respectively.
In 2005, he joined the faculty of the Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan, where he is currently an Associate Professor. His research interests include miniaturized microwave circuit designs, ultra-wideband antennas, antenna arrays, and RF identification (RFID).
Dr. Ma was the recipient of the Poster Presentation Award presented at the 2008 International Workshop on Antenna Technology (iWAT), Chiba, Japan.View more