Functional testing for cellular neural networks - Electronics Letters

Results: The operating frequency of our radio module is 38GHz and the transition is matched to 5 0 9 . A substrate thickness of 1 7 0 p was chosen which needs a line width of 3 6 3 ~ for the microstrip and coplanar line. The slot width is 3 1 ~ . The via holes are processed with a CO, laser and have diameters of 2 6 0 ~ on the top side and 1 8 0 2 3 0 ~ on the back side. These via holes have to be filled either in a soldering process or by means of an organic material (glop top filling). The resulting excellent return loss of -20dB is shown in Fig. 4. Although we performed the measurement only from 36 to 40GHz we mention here that this structure can be used as a broadband transition because no frequency selective elements are incorporated.