D. Kholodnyak, V. Turgaliev, A. Rusakov, K. Zemlyakov, and I. Vendik, A frequency independent phase inverting all-pass network suitable for a design of ultra-wideband 180° phase shifters, IEEE Microwave Conference, 2011.

K. Khoder, M. , L. Roy, and A. Perennec, An All-pass Topology to Design a 0-360 0 Continous Phase Shifter with Low Insertion Loss and Constant Differential Phase Shifter, IEEE Microwave Integrated Circuit Conference, 2014.

U. L. Rohde;-a, ;. S. Poddar, and . Pegwal,

V. Madhavan,

S. K. Koul,

M. Abegaonkar,

M. A. Silaghi, Ultra wide band balun/180° power divider using microstrip-slotline-microstrip transition, IEEE International Microwave and RF Conference (IMaRC), 2015.

A. M. Abbosh, Ultra-wideband phase shifters, IEEE Trans. Microwave Theory and Techniques, vol.55, issue.9, pp.1935-1941, 2007.

K. Matsumoto, T. Ktamura, and Y. Hori, Miniaturized circuit design of operational-amplifier-based non-foster impedance, IEEE Conference, 2017.

S. Saadat, H. Aghasi, E. Afshari, and H. Mosallaei, Low -Power Negative Inductance Integrated Circuits for GHz Applications, IEEE Microwave and Wireless Components Letters, vol.25, issue.2, 2015.

B. Razavi, The Cross-Coupled Pair -Part I [A Circuit for All Seasons, 2014.

S. D. Stearns, Non-Foster circuits and stability theory, IEEE Antenna and Propag. Society Int. Symp, pp.1942-1945, 2011.