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该论文设计了一款覆盖5.2-13GHz的Class-AB CMOS功率放大器，实现了25.2dBm峰值输出功率和21.6%的功率附加效率，解决了宽带通信和雷达系统中对高功率、高效率宽带功率放大器的需求。
The ever-increasing demand for higher data rates in communication links has created a need for power amplifiers with large instantaneous bandwidth. Moreover, software-defined radio and smart antenna systems require power stages capable of transmitting at programmable carrier frequencies within a large bandwidth to achieve frequency multiplicity. Also, advanced radar imaging systems, such as through-the-wall imaging, require amplification of broadband signals whose reflection/transmission spectral information can be used for target detection. However, conventional multi-GHz broadband power amplifiers are commonly implemented as distributed amplifiers, which typically have poor power efficiency due to non-optimum load impedance at each stage. Balanced amplifier techniques yield better efficiency but require wide-band on-chip couplers which limit their use within millimeter-wave frequencies due to excessive
Hua Wang, Constantine Sideris, Ali Hajimiri
California Institute of Technology, Pasadena, CA