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The aim of this paper lies in comparison of two CAD (Computer aided Design) software (Ansoft Designer from Ansys and HyperLynx 3D EM Designer from Mentor Graphics) and real measurements of designed and fabricated filters. Both software tools belong to the group of the most used tools for design and simulation of different structures. These structures are made by transmission lines of a few kinds (microstrip, stripline, slotline, etc.) and they substitute common elements in HF (High Frequency) area. This paper presents 3 various microstrip filters based on LTCC (Low Temperature Co-fired Ceramic) dielectric material GreenTape 951. Low pass (LP), band pass (BP) and band stop (BS) filters for UWB (Ultra Wide-Band) sensor systems were designed, simulated, fabricated and measured. Measured results and simulations (S21 – forward transmission coefficient) are plotted in joint graphs where divergences are observed and depicted.

CORRELATION BETWEEN SIMULATIONS AND REAL MEASUREMENTS OF MICROSTRIP FILTERS BASED ON LTCC IN HIGH FREQUENCY AREA