A 54-69.3 GHz Dual Band VCO with Differential Hybrid Coupler for Quadrature Generation

A 54-69.3 GHz Dual Band VCO with Differential Hybrid Coupler for Quadrature Generation ■

Qixian Shi, Qixian Shi, Qixian Shi, Kristof Vaesen, Kristof Vaesen, Kristof Vaesen, Bertrand Parvais, Bertrand Parvais, Bertrand Parvais, Giovanni Mangraviti, Giovanni Mangraviti, Giovanni Mangraviti, Piet Wambacq, Piet Wambacq, Piet Wambacq

Abstract ■

This paper presents a 40nm CMOS transformer based dual-band VCO with differential hybrid coupler for I/Q generation. The average phase noise of the combination over the 54 to 69.3GHz tuning range is -90dBc/Hz at 1MHz offset while the best FOM value is 177dB. Along the wide tuning range, the I/Q mismatch of the hybrid coupler is less than 3 degree. The area of the hybrid is only 60um*65um.