Microstrip Bandpass Filters - a Comparative Study
They concluded that the laser process was excellent for producing the filters, whereas the etched and milled filters yielded measurements exhibiting greater deviations from the simulation. Compared with boards produced by etching, printed circuit boards produced with the ProtoLaser U4 showed identical or better performance. PCBs milled with the ProtoMat S103 showed a shift to higher frequencies. Production for the 10-GHz bandpass filter only took four minutes with the ProtoLaser U4 and eight minutes with the ProtoMat S103, whereas the externally etched boards took a week to be delivered.
Via frequency measurements, HF designers can modify board layouts and quickly manufacture the boards with the ProtoLaser U4 in-house to improve circuits. The ProtoLaser U4 is hence an ideal tool for rapid prototyping or low-volume manufacturing.
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