This letter presents a low-cost and compact reconfigurable frequency measurement circuit able to reconfigure bandwidth and resolution, the design uses a varactor loaded phase shifter, a reference delay line, and power divider/combiner to form a 2-bit frequency discriminator with four states for frequency measurement. The reconfigurable discriminator has four bandwidth states of 0.5, 0.9, 1.3, and 1.7 GHz, with uniform subband resolution of 125, 225, 325, and 525 MHz, for each bandwidth state of operation, respectively.

中文翻译：

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具有可重新配置带宽和分辨率的频率测量设备

这封信提出了一种能够重新配置带宽和分辨率的低成本、紧凑的可重构频率测量电路，该设计使用变容二极管加载移相器、参考延迟线和功率分配器/组合器来形成具有四种状态的 2 位鉴频器用于频率测量。可重构鉴别器具有 0.5、0.9、1.3 和 1.7 GHz 四个带宽状态，对于每个带宽操作状态，均具有 125、225、325 和 525 MHz 的统一子带分辨率。