研究目的
Demonstrating the performance of additively manufactured FG-CPW with measured attenuation that is on par with traditional manufactured counterparts on an alumina calibration substrate at frequencies from DC to 110 GHz.
研究成果
The performance of several additively manufactured FG-CPW is demonstrated with measured attenuation that is on par with traditional manufactured counterparts on an alumina calibration substrate at frequencies from DC to 110 GHz. The results are further validated using 3D EM simulations with good agreement.
研究不足
The dimensional accuracy and fabrication tolerance within a few microns are important for implementation of FG-CPW operating at mm-wave frequencies.
1：Experimental Design and Method Selection:
The FG-CPW scheme was selected over other conventional coplanar waveguide structures due to its reduced size and lower susceptibility to the excitation of higher modes at mm-wave frequencies.
2：Sample Selection and Data Sources:
Several lines based on the configuration shown in Fig. 1 were designed with different characteristic impedances.
3：List of Experimental Equipment and Materials:
The fabrication process was carried out with an nScrypt 3Dn tabletop system capable of a
4：5 μm alignment resolution. Experimental Procedures and Operational Workflow:
The slots of the FG-CPW are cut using a Nd:YAG (Lumera Laser’s SUPER RAPID-HE) pico-second pulsed laser beam at a repetition rate of 100 kHz using either the 355 nm wavelength using an average power from
5：025 W to 65 W or the 1064 nm wavelength using a power of 4 W. Data Analysis Methods:
The FG-CPW lines were characterized using an Agilent PNA-N5227A network analyser and GGB 150 μm-pitch picoprobes from 0-67 GHz. Subsequently, measurements from 65-110 GHz were performed using 3742A-EW Anritsu W-band extenders.
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