Array Phase Shifters: Theory and Technology, Antenna Engineering Handbook, 2007. ,
A New Class of Broad-Band Microwave 90-Degree Phase Shifters, IEEE Transactions on Microwave Theory and Techniques, vol.6, issue.2, pp.232-237, 1958. ,
DOI : 10.1109/TMTT.1958.1124543
A Miniaturized MMIC Analog Phase Shifter Using Two Quarter-Wave-Lengh Transmission Lines, IEEE Trans. MTT, vol.50, issue.1, 2002. ,