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Direct Machining of Low-Loss THz Waveguide Components With an RF Choke.
IEEE Microwave and Wireless Components Letters ( IF 2.310 ) Pub Date : 2015-03-31 , DOI: 10.1109/lmwc.2014.2303161
Samantha M Lewis,Emilio A Nanni,Richard J Temkin

We present results for the successful fabrication of low-loss THz metallic waveguide components using direct machining with a CNC end mill. The approach uses a split-block machining process with the addition of an RF choke running parallel to the waveguide. The choke greatly reduces coupling to the parasitic mode of the parallel-plate waveguide produced by the split-block. This method has demonstrated loss as low as 0.2 dB/cm at 280 GHz for a copper WR-3 waveguide. It has also been used in the fabrication of 3 and 10 dB directional couplers in brass, demonstrating excellent agreement with design simulations from 240-260 GHz. The method may be adapted to structures with features on the order of 200 μm.
更新日期:2019-11-01

 

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