1. Wilkinson, , E. J., "An N-way hybrid power divider," IRE Trans. Microw. Theory Tech., Vol. 8, No. 1, 116-118, Jan. 1960.
doi:10.1109/TMTT.1960.1124668        Google Scholar

2. Li, B., X. Wu, N. Yang, and W. Wu, "Dual-band equal/unequal Wilkinson power dividers based on coupled-line section with short-circuited stub," Progress In Electromagnetics Research, Vol. 111, 163-178, 2011.
doi:10.2528/PIER10110108        Google Scholar

3. Wu, , Y., Y. Liu, and , "An unequal coupled-line Wilkinson power divider for arbitrary terminated impedances," Progress In Electromagnetics Research,, Vol. 117, 181-194, 2011.        Google Scholar

4. Li, , J., Y. Wu, Y. Liu, J. Shen, S. Li, and C. Yu, "A generalized coupled-line dual-band Wilkinson power divider with extended ports," Progress In Electromagnetics Research, Vol. 129, 197-214, 2012..        Google Scholar

5. Deng, , P.-H., J.-H. Guo, and W.-C. Kuo, "New Wilkinson power dividers based on compact stepped-impedance transmission lines and shunt open stubs," Progress In Electromagnetics Research,, Vol. 123, 407-426, 2012.
doi:10.2528/PIER11111612        Google Scholar

6. Chang, L., C. Liao, L.-L. Chen, W. Lin, X. Zheng, and Y.-L. Wu, "Design of an ultra-wideband power divider via the coarse-grained parallel micro-genetic algorithm," Progress In Electromagnetics Research, Vol. 124, 425-440, 2012.
doi:10.2528/PIER11120517        Google Scholar

7. Wang, , D., H. Zhang, T. Xu, H. Wang, and G. Zhang, "Design and optimization of equal split broadband microstrip Wilkinson power divider using enhanced particle swarm optimization algorithm," Progress In Electromagnetics Research,, Vol. 118, 321-334, 2011.
doi:10.2528/PIER11052303        Google Scholar

8. Bialkowski, , M. E. and A. M. Abbosh, "Design of a compact UWB out-of-phase power divider," IEEE Microw. Wirel. Compon. Lett.,, Vol. 17, No. 4, 289-291, Apr. 2007.
doi:10.1109/LMWC.2007.892979        Google Scholar

9. Li, , Q., X.-W. Shi, F. Wei, and J.-G. Gong, "A novel planar 180 out-of-phase power divider for UWB application," Journal of Electromagnetic Waves and Applications, Vol. 25, No. 1, 161-167, 2011.
doi:10.1163/156939311793898288        Google Scholar

10. Shamaileh, K. A. A., A. M. Qaroot, and N. I. Dib, "Non-uniform transmission line transformers and their application in the design of compact multi-band Bagley power dividers with harmonics suppression," Progress In Electromagnetics Research, Vol. 113, 269-284, 2011.        Google Scholar

11. Zhang, , H., X.-W. Shi, F. Wei, and L. Xu, "Compact wideband Gysel power divider with arbitrary power division based on patch type structure," Progress In Electromagnetics Research, Vol. 119, 395-406, 2011.
doi:10.2528/PIER11071501        Google Scholar

12. Al-Zayed, , A. S. and S. F. Mahmoud, "Seven ports power divider with various power division ratios," Progress In Electromagnetics Research, Vol. 114, 383-393, 2011.        Google Scholar

13. Peng, , H., Z. Yang, and T. Yang, "Design and implementation of an ultra-wideband six-port network," Progress In Electromagnetics Research, Vol. 131, 293-310, 2012.        Google Scholar

14. Bialkowski, , M. E., A. M. Abbosh, and N. Seman, "Compact microwave six-port vector voltmeters for UWB applications," IEEE Trans. on Microw. Theory and Tech., Vol. 55, No. 55, 2216-2223, Oct. 2007.
doi:10.1109/TMTT.2007.906539        Google Scholar

15. Bialkowski, , M. E., A. M. Abbosh, and J. Swayn, "Design of a compact microwave six-port vector voltmeter for UWB applications," IEEE MTT-S Int. Microw. Symp. Dig., 2007.        Google Scholar

16. Moscoso-Martir, , A., I. Molina-Fernandez, and A. Ortega Monux, "High performance multi-section corrugated slot-coupled directional couplers," Progress In Electromagnetics Research, Vol. 134, 437-454, 2013..        Google Scholar

17. Abbosh, A. M. and M. E. Bialkowski, "Design of compact directional couplers for UWB applications," IEEE Trans. on Microw. Theory and Tech., Vol. 55, No. 2, 189-194, Feb. 2007.
doi:10.1109/TMTT.2006.889150        Google Scholar

18. Moscoso-Martir, , A., J. G.Wangemert-Perez, I. Molina-Fernandez, and E. Marquez-Segura, "Slot-coupled multisection quadrature hybrid for UWB applications," IEEE Microw. Wirel. Compon. Lett.,, Vol. 19, No. 3, 143-145, Mar. 2009.
doi:10.1109/LMWC.2009.2013700        Google Scholar

19. Galwas, , B. and S. Palczewski, "Idea of six-port vector-voltmeter with homodyne phase-sensitive detectors," Ninth Instrumentation and Measurement Technology Conference, 380-384, 1992.        Google Scholar

20. Peng, , H., Z. Yang, and T. Yang, "Design and implementation of a practical direction finding receiver," Progress In Electromagnetics Research Letters, Vol. 32, 157-167, 2012.        Google Scholar

21. De la Morena-Alvarez-Palencia, , C. and M. Burgos-Garcia, "Four-octave six-port receiver and its calibration for broadband communications and software defined radios," Progress In Electromagnetics Research, Vol. 116, 1-21, 2011.        Google Scholar

22. Moscoso-Martir, , A., I. Molina-Fernandez, and A. Ortega-Monux, "Signal constellation distortion and BER degradation due to hardware impairments in six-port receivers with analog I/Q generation," Progress In Electromagnetics Research, Vol. 121, 225-247, 2011.
doi:10.2528/PIER11070801        Google Scholar

23. Boukari, B., E. Moldovan, S. Affes, K. Wu, R. G. Bosisio, and S. O. Tatu, "A heterodyne six-port FMCW radar sensor architecture based on beat signal phase slope techniques," ogress In Electromagnetics Research, Vol. 93, 307-322, , 2009.
doi:10.2528/PIER09052610        Google Scholar

24. Song, , K. J., Q. Xue, and , "Novel ultra-wideband (UWB) multilayerslot-line power divider with band pass response," slot-line power divider with band pass response Wirel. Compon. Lett.,, Vol. 20, No. 1, 13-15, Jan. 2010.
doi:10.1109/LMWC.2009.2035951        Google Scholar

25. Abbosh, , A. M., M. E. Bialkowski, and , "An UWB planar out-of-phase power divider employing parallel stripline-microstrip transitions," Microwave and Optical Technology Letters, Vol. 49, No. 4, 912-914, Apr. 2007.
doi:10.1002/mop.22324        Google Scholar

26. Abbosh, , A. M., "Ultra wideband in-phase power divider for multilayer technology," IET Microwave, Antenna and Propagation, Vol. 3, No. 1, 148-153, Feb. 2009.
doi:10.1049/iet-map:20070310        Google Scholar

27. Pozar, D., , Microwave Engineering, 3rd Ed., Wiley, New York, 2005..

28. Schuppert, , B., "Microstrip/slotline transitions: Modeling and experimental investigation," IEEE Trans. on Microw. Theory and Tech. , Vol. 36, No. 8, 1272-1282, Aug. 1988.
doi:10.1109/22.3669        Google Scholar

29. Knorr, , J. B., "Slot-line transitions," IEEE Trans. on Microw. Theory and Tech. , Vol. 22, No. 5, 548-554, May 1974.
doi:10.1109/TMTT.1974.1128278        Google Scholar