Title :
A tri-band Wilkinson power divider using extended T-shaped stubs
Author :
Li, Bo ; Wu, Xidong ; Hua, Changzhou ; Yang, Nan ; Zhu, Daohong ; Wu, Wen
Author_Institution :
Dept. of Inf. & Electron. Eng., Zhejiang Univ., Hangzhou, China
Abstract :
This paper presents a tri-band Wilkinson power divider. The proposed structure is derived from the conventional Wilkinson power divider by replacing the quarter-wavelength branch lines with the extended T-shaped short or open stubs. The first and the third operating frequencies of the proposed power divider can be flexibly controlled, while the second frequency is equal to the mean value of the other two frequencies. Both the power dividers using the extended T-shaped short and open stub structures are designed based on the derived equations and the frequency response characteristics are discussed. For verification, a short stub based tri-band Wilkinson power divider operating at 1.3, 3.0 and 4.7 GHz is fabricated and measured. The measurements are in good agreement with the simulations. The measured bandwidths of -20 dB isolation are 1.22-1.42 GHz, 2.92-3.18 GHz and 4.66-4.86 GHz, respectively. Over these three operating bandwidths, the measured return losses are better than -15 dB at all three ports.
Keywords :
power dividers; extended T-shaped short structures; extended T-shaped stubs; frequency response characteristics; open stub structures; quarter-wavelength branch lines; tri-band Wilkinson power divider; Dual band; Frequency conversion; Frequency measurement; Impedance; Power dividers; Scattering parameters; Transmission line measurements;
Conference_Titel :
Microwave Conference Proceedings (CJMW), 2011 China-Japan Joint
Conference_Location :
Hangzhou
Print_ISBN :
978-1-4577-0625-7
Electronic_ISBN :
978-7-308-08555-7