Slot Line Filters

The slot transmission line on high dielectric constant substrates provides a microwave medium for fabricating microwave filters that could have application to integrated circuits. Specifically, configurations which yield band-pass and band-stop filter characteristics are being investigated; coupling data has been obtained and several experimental filters have been constructed. The investigation was performed at frequencies near 3 GHz using circuits fabricated primarily on 0.063 inch thick, Trans Tech D-16, substrate material. The substrates were metallized using either aluminum sensing tape (3M No. 51) or using a combination of electroless and electroplating in order to deposit copper to a thickness of approximately 0.001 inch.