Mueller Filipp, Schouten Raymond N, Brauns Matthias, Gang Tian, Lim Wee Han, Lai Nai Shyan, Dzurak Andrew S, van der Wiel Wilfred G, Zwanenburg Floris A
NanoElectronics Group, MESA+ Institute for Nanotechnology, University of Twente, Enschede, The Netherlands.
Rev Sci Instrum. 2013 Apr;84(4):044706. doi: 10.1063/1.4802875.
We report the characterisation of printed circuit boards (PCB) metal powder filters and their influence on the effective electron temperature which is as low as 22 mK for a quantum dot in a silicon MOSFET structure in a dilution refrigerator. We investigate the attenuation behaviour (10 MHz-20 GHz) of filter made of four metal powders with a grain size below 50 μm. The room-temperature attenuation of a stainless steel powder filter is more than 80 dB at frequencies above 1.5 GHz. In all metal powder filters, the attenuation increases with temperature. Compared to classical powder filters, the design presented here is much less laborious to fabricate and specifically the copper powder PCB-filters deliver an equal or even better performance than their classical counterparts.
我们报告了印刷电路板（PCB）金属粉末滤波器的特性，以及它们对有效电子温度的影响。在稀释制冷机中的硅MOSFET结构中的量子点，其有效电子温度低至22 mK。我们研究了由四种粒度小于50μm的金属粉末制成的滤波器的衰减特性（10 MHz - 20 GHz）。不锈钢粉末滤波器在室温下高于1.5 GHz频率时的衰减超过80 dB。在所有金属粉末滤波器中，衰减随温度升高而增加。与传统粉末滤波器相比，这里介绍的设计制造起来要省力得多，特别是铜粉PCB滤波器的性能与其传统同类产品相当甚至更好。
