A design of dual-band band-pass filter with miniaturization based on LTCC technology

This paper designs a dual-band band-pass filter with miniaturization according to the project requirements. Advanced LTCC (low temperature co-fired ceramics) technology is adopted to ensure its small volume. The dual-band band-pass filter is based on two band-pass filters which use lumped structure for easier debugging. LC matching network is necessary for realizing impedance matching. Circuit simulator ADS designs equivalent circuits and 3D simulation software HFSS builds three-dimensional models of inductance and capacitance. Finally the first pass-band is 380MHz to 560MHz and the second pass-band is 1400MHz to 1800MHz. The size of dual-band band-pass filter is only 3.2mm×6.5mm×2.3mm.