volume | PIER Journals

Abstract

This paper proposes a 10:1 unequal Gysel power divider using a capacitive loaded transmission line (CLTL). For obtaining a high dividing ratio of divider, the CLTL is proposed to realize a low characteristic impedance line below 10 Ω. A design method using a CLTL which consists of a small transmission line with shunt open stub at periodic intervals is newly suggested for power divider with the high power division ratio. For the validation of the CLTL power divider, the high dividing ratio of the fabricated Gysel divider is measured at a center frequency of 1 GHz. The measured performances are in good agreements with simulation results.

1. Li, B., X. Wu, and W. Wu, "A 10 : 1 unequal Wilkinson power divider using coupled lines with two shorts," IEEE Microw. Wireless Compon. Lett., Vol. 19, No. 12, 789-791, Dec. 2009.
doi:10.1109/LMWC.2009.2033506 Google Scholar

2. Lim, J., S. Lee, C. Kim, J. Park, D. Ahn, and S. Nam, "A 4 : 1 unequal Wilkinson power divider," IEEE Microw. Wireless Compon. Lett., Vol. 11, No. 3, 124-126, Mar. 2001.
doi:10.1109/7260.915624 Google Scholar

3. Chen, J. and Q. Xue, "Novel 5 : 1 unequal Wilkinson power divider using offset double-sided parallel-strip lines," IEEE Microw. Wireless Compon. Lett., Vol. 17, No. 3, 175-177, Mar. 2007.
doi:10.1109/LMWC.2006.890458 Google Scholar

4. Sun, Z., L. Zhang, Y. Yan, and H. Yang, "Design of unequal dual-band Gysel power divider with arbitrary termination resistance," IEEE Trans. Microw. Theory Tech., Vol. 59, No. 1, 1-9, 2011.
doi:10.1109/TMTT.2011.2163201 Google Scholar

5. Collin, R. E., , Chapter 8, McGraw-Hill, New York, 1992.

6. Eccleston, K. W. and S. H. Ong, "Compact planar microstripline branch-line and rat-race couplers," IEEE Trans. Microw. Theory Tech., Vol. 51, No. 10, 2119-2125, Oct. 2003.
doi:10.1109/TMTT.2003.817442 Google Scholar

7. Rawat, K. and F. M. Ghannouchi, "Design of reduced size power divider for lower RF band using periodically loaded slow wave structure," IMS2009, 613-616, Jun. 2009. Google Scholar

8. Gysel, U. H., "A new N-way power divider/combiner suitable for high-power applications," IEEE MTT-S Int. Dig., 116-118, 1975. Google Scholar

9. Wu, Y., Y. Liu, and S. Li, "A modi¯ed Gysel power divider of arbitrary power ratio and real terminated impedances," IEEE Microw. Wireless Compon. Lett., Vol. 21, No. 11, 601-603, Nov. 2011.
doi:10.1109/LMWC.2011.2168603 Google Scholar

Dr. Young Kim