The design of LC resonator based bandpass filter embedded in LTCC substrate

This paper outlines the design of a miniaturized bandpass filter realized in low-temperature co-fired ceramic (LTCC) substrate. A three-dimensional structure band-pass filter used in radar receiver front-end with 860 MHz central frequency and 3.5% (30 MHz) fractional bandwidth was designed using LC lumped components.. A pair of transmission zeros were introduced to achieve high stopband rejection. The resulte of the simulation shows that the insertion loss in the passband is about 5 dB and the attenuation is more than 35 dB in the stopband. The area occupied by the filter is 6.8 mm × 4.3 mm × 0.7 mm.