multipath cascaded single stage distributed power detector; analysis and design

In this paper, a novel technique to improve the input dynamic range and bandwidth of the microwave power detectors (pds) simultaneously is presented, which utilizes the piecewise linear approximation in conjunction with the distributed structure to achieve the goals. rf to dc conversion is proved for the proposed pd core, including only a mos transistor that is capable to convert a part of its rf input signal to a dc value, proportional to the rf input power. this is an efficient method that requires less number of active devices and therefore saves more power consumption and active chip area, rather than the previous conventional methods. the analysis of circuit based on the transmission line theory is discussed and the transfer function is extracted mathematically for the proposed model. moreover, a transistor level design is performed using a 0.15um phemt gaas technology for 24ghz applications. the post layout simulation results are presented.