TGV: Via Angle and Transmission

To investigate the impact of the via diameter d, three values (50 μm, 100 μm and 200 μm) were assigned while the other variables were kept constant at h = 500 μm and a = 90°. The results reveal that this variation in via diameter has no significant impact on the insertion loss of the via up to 10 GHz. Beyond this frequency, the insertion loss of the 200 μm via degrades severely (approx. 60% of power is transmitted @ 50 GHz). The transmission coefficients of the 50 μm and the 100 μm via remain above 85% over the whole bandwidth.