Millimeter-Wave Deep Integrated and Direct Matched Active Antenna for High Power Efficiency

This paper presents a novel active integrated antenna unit cell for millimeter-wave (mmW) active array designs. With the co-design of the electromagnetics and circuits, a 47% power added efficiency has been achieved over a 5 G band around 28 GHz. The direct matching network is simple and compact, which is easy to be allocated in the antenna unit cell. Moreover, the impedance bandwidth is also stable versus beam scanning in various directions. Hence, the investigated deep integration and direct matching technologies have significantly enhanced the system power efficiency, paving the way for high efficiency $\mathbf{m m W}$ communication systems.