A Miniaturized Wilkinson Power Divider with Harmonic Suppression Characteristics Using Planar Artificial Transmission Lines

• Published in: 2007 Asia-Pacific Microwave Conference pp. 1 - 4
• Main Authors: Chao-Wei Wang, Kuen-Hua Li, Chin-Jay Wu, Tzyh-Ghuang Ma
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01.12.2007
• Subjects: Artificial transmission line; Bandwidth; Design methodology; Distributed parameter circuits; Frequency conversion; harmonic suppression; Harmonics suppression; Microwave circuits; Planar transmission lines; Power dividers; Power transmission lines; radio frequency identification; Radiofrequency identification; Wilkinson power divider
• ISBN: 9781424407484; 1424407486
• ISSN: 2165-4727; 2165-4743
• DOI: 10.1109/APMC.2007.4555112

In this paper, a miniaturized Wilkinson power divider with harmonic suppression characteristics is proposed for ultra-high-frequency (UHF) radio frequency identification (RFID) applications. This design consists of four sections of a recently proposed planar artificial transmission line (ATL). The experimental results reveal that the proposed power divider features low insertion loss and compact size. At the center frequency of the UHF RFID system, the occupied size of the proposed miniaturized Wilkinson power divider is merely 13.4 mm X 22.4 mm, or equivalently 0.065 lambda g X 0.109 lambdag . By utilizing the harmonic suppression nature of the ATL and two additional short-circuited stubs, this miniaturized divider also exhibits harmonic suppression characteristics over nearly a decade bandwidth. The design methodology, simulated and experimental results are discussed throughout the paper.