A 50–67-GHz Transformer-Based Six-Port Balanced-to-Unbalanced Quadrature Hybrid Coupler https://sscs.ieee.org/wp-content/themes/movedo/images/empty/thumbnail.jpg 150 150 https://secure.gravatar.com/avatar/8935a7dcd6741d8e23d45bb15c1470a8?s=96&d=mm&r=g
Abstract:
This letter presents the first on-chip transformer-based six-port balanced-to-unbalanced quadrature hybrid coupler (QHBC). The proposed six-port QHBC employs three transformers to replace eight inductors design in conventional LC-based couplers for miniaturization. Fabricated in CMOS 28 nm, the overall size of the proposed coupler is 0.23 mm $\times0.17$ mm, which is equivalent to $0.046\…