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提出了一种功耗仅3.5mW的毫米波有源带通滤波器，采用全无源干扰消除前馈路径来抑制带外干扰。解决了毫米波频段缺乏SAW滤波器、接收机需高功耗实现线性度和滤波的问题。
Millimeter-wave (mm-wave) frequencies are widely used in applications that require high throughput and/or small sizes thanks to the wide available bandwidth and small achievable antenna-array sizes. Applications such as portable consumer electronics and AR/VR headsets also require low-power operation to maximize battery life. Unfortunately, there are no SAW-equivalent filters available at these frequencies, and thus any mm-wave receivers must combat out-of-band interferers on their own. This typically involves consuming significant power in the pursuit of linearity and filtering at mm-wave frequencies. For example, receivers that use mixer-first approaches with N-path filters (Fig. 5.10.1, top left) can achieve excellent linearity and filtering performance, though at the expense of significant clocking power to the N-path mixer stages and high noise figure due to the lack of RF amplification, for example 13 to 89mW and 8 to 20dB in [1-5], respectively. Similarly,
Ahmed Gharib Gadelkarim, Patrick Mercier
University of California, San Diego, CA