L-waveband high stopband rejection micro band-pass filter

The invention discloses an L-waveband high stopband rejection micro band-pass filter. The L-waveband high stopband rejection micro band-pass filter comprises an input/output interface mounted on the surface, six parallel resonant units realized by adopting three layers of folding coupling strip lines, six zero setting units, a Z-shaped cross-coupling circuit, and input and output inductors, wherein each element is realized by adopting the technique of more than two layers of low-temperature co-fired ceramic, and the input and output inductors are designed based on strip lines of distributed parameters. The L-waveband high stopband rejection micro band-pass filter has the advantages of small volume, light weight, high reliability, good electrical property, good temperature stability, good indicator and batch consistency of electrical property, low cost of mass production, etc. The L-waveband high stopband rejection micro band-pass filter disclosed by the invention specially applies to communication of related microwave frequency bands, the digital radar, individual satellite mobile, military and civilian multi-mode and multi-way communication system terminals, wireless communication handhold terminals, as well as related systems with harsh requirements in volume, weight, performance and reliability.