Quadrature Harmonic Self-Oscillating Mixer for Multifunction Wireless Communication and Sensing Systems

In this paper, a quadrature harmonic self-oscillating mixer (QHSOM) for large active array receiver developments is proposed, studied, and presented for next-generation of multifunction millimeter-wave (mmW) and terahertz (THz) wireless communication and sensing systems. The presented QHSOM is the most compact stand-alone receiver, capable of receiving and demodulating quadrature phase modulations. The principle of operation and procedure of design are discussed. Measurement results are provided and examined. To the best of the authors’ knowledge, this is the first quadrature-phase self-oscillating mixer ever reported in the literature.