Optical transceiver equipped with ground via

An optical transceiver, comprising:

• a substrate having two side edges opposite to each other and a distal edge between the two side edges and having a main region and a golden finger region closer to the distal edge than the main region;
• a plurality of filtering capacitors disposed in the main region on the substrate;
• and
• a plurality of radio-frequency signal lines connected to the plurality of filtering capacitors and each comprising:
• a first conductive portion disposed in the substrate and extending from the main region to the golden finger region;
• a second conductive portion disposed on the substrate and located in the golden finger region;
• and
• a conductive via conductively connecting the first conductive portion and the second conductive portion and extending no more than three layers of the substrate;
• and
• a plurality of ground vias located at the two side edges and the distal edge and distributed from the main region to the golden finger region,
• wherein a shortest distance between each one of the plurality of radio-frequency signal lines and the two side edges is larger than 0.95 mm,
• wherein each one of the plurality of radio-frequency signal lines further comprises a pair of differential signal lines, a distance between the pair of differential signal lines is less than three times of a width of each one of the pair of differential signal lines.