Harmonics Suppression of Wilkinson Power Divider Using Spurlines with Adjustable Rejection Bands

Conference: GeMIC 2008 - German Microwave Conference
03/10/2008 - 03/12/2008 at Hamburg-Harburg, Germany

Proceedings: GeMIC 2008

Pages: 4Language: englishTyp: PDF

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Liu, Haiwen; Yang, Yuehan; Li, Xiaohua; Li, Wenming (Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China)
Knoechel, Reinhard H.; Schuenemann, Klaus F. (nn)

A newly asymmetrical spurline structure is presented in this letter. Its dual-bandgap characteristics are reported and can be adjusted by changing the length difference between spurlines. Then, a simple circuit model is set up for the spurline structure by using two LCR-resonators and the circuit parameters can be extracted from EM simulations. Moreover, a Wilkinson power divider using the proposed spurlines was designed, fabricated, and measured. Experimental results verify that 27-dB suppression for the second harmonic and 30-dB suppression for the third harmonic are obtained, respectively. In addition, the reflection coefficient are -3.5 dB ± 0.3dB (-3 dB for ideal case) below 3.8 GHz and -3.7 dB at the operating frequency 3.12 GHz.