A. Ghosh, The 5G mmWave Radio Revolution, Microw. J, pp.22-36, 2016.

B. M. Schiffman, 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

H. Hayashi, T. Nakagawa, and K. Araki, A miniaturized MMIC analog phase shifter using two quarter-wave-length transmission lines, IEEE Transactions on Microwave Theory and Techniques, vol.50, issue.1, pp.150-154, 2002.
DOI : 10.1109/22.981259

K. Khoder, A. Pérennec, and M. Roy, A 180?? Tunable Analog Phase Shifter Based on a Single All-Pass Unit Cell, Microwave and Optical Technology Letters, vol.41, issue.12, pp.2915-2918, 2013.
DOI : 10.1002/mop.27955
URL : https://hal.archives-ouvertes.fr/hal-00867023

J. Lugo-alvarez, A. Bautista, F. Podevin, and P. Ferrari, High-directivity compact slow-wave CoPlanar waveguide couplers for millimeter-wave applications, 2014 44th European Microwave Conference, 2014.
DOI : 10.1109/EuMC.2014.6986624
URL : https://hal.archives-ouvertes.fr/hal-01021205

B. Min and G. M. Rebeiz, Single-Ended and Differential Ka-Band BiCMOS Phased Array Front-Ends, IEEE Journal of Solid-State Circuits, vol.43, issue.10, 2008.
DOI : 10.1109/JSSC.2008.2004336