Presidential Faculty Fellow

9350206 Popovic研究集中在微波和毫米波固态器件的准光功率合成。 该技术允许将大量单独设备的功率组合在紧凑、低成本、可靠的高功率源中。 由于功率合成发生在自由空间，辐射和天线设计的解决。 放大器和振荡器组合器进行了研究，使用FET或双极晶体管。 一个面向设计的分析是开发优化辐射结构的几何形状对不同的设计标准，如功率，带宽，效率或低噪声。 在振荡器的情况下，大量的设备的非线性行为和注入锁定进行了研究。 在放大器的情况下，高效率电路拓扑与辐射结构相结合，以最大限度地减少散热要求。 该工作的目标是开发一种紧凑、廉价的微波固态源，用于各种应用，如车载雷达、移动的通信、无线通信、大气研究和遥感。***

9350206 Popovic The research concentrates on quasi optical power combining of microwave and millimeter wave solid state devices. This technique allows the powers of a large number of individual devices to be combined in a compact, low cost, reliable high power source. Since the power combining occurs in free space, radiation and antenna design are addressed. Both amplifier and oscillator combiners are studied, using FETs or bipolar transistors. A design oriented analysis is developed for optimizing the radiating structure geometry towards different design criteria, such as power, bandwidth, efficiency or low noise. In the case of oscillators, nonlinear behaviour and injection locking of a large number of devices are studied. In the case of amplifiers, a high efficiency circuit topology is combined with the radiating structure in order to minimize heat sinking requirements. The goal of the work is to develop a compact, inexpensive microwave solid state source for a variety of applications, such as vehicular radar, mobile communications, wireless communications, atmospheric studies and remote sensing. ***