Miniaturized wide-stop-band restraint LTCC low-pass filter

The invention discloses a miniaturized wide-stop-band restraint LTCC low-pass filter. The filter structurally comprises an input port P1, an output port P2, a first external side printing area GF, a second external side printing area GB, a first inductor L1, a first capacitor C1, a second inductor L2, a second capacitor C2, a third inductor L3, a third capacitor C3, an internal ground G and a printing mark M. According to the low-pass filter, the cut-off frequency is 2400 MHz, the low-pass filter with only one transmission zero serves as a prototype, the electromagnetic coupling effect in the structure is reasonably made used of, two parasitism transmission zeroes are formed, and accordingly good micro-wave characteristics are achieved with fewer filter series. The filter has the obvious advantages of being compact in structure, small in size, good in in-band characteristic, high in out-of-band rejection, high in stop-band width and the like, an SMT packaging mode is adopted, integration is facilitated and the application prospect is wide.