Abstract: In this paper, an L band narrowband band-pass filter of Chebyshev-type with Low Temperature Co-fired Ceramic(LTCC) technology is proposed. The filter in nine substrate layers of Dupont 951 adopts the lumped-element inductors and capacitorsin order to miniature the size of the filter. In order to realize the narrowband filter and produce two finite transmission zeros of thestop-band, lumped-elements in series and parallel are used. Coupling coefficient between the neighboring resonators is controlled bythe coupling space. A broadband microstrip line to stripline transition is proposed in this paper too. The filter (with the transition)exhibits a simulation performance of a minimum insertion loss of 0.5 dB and return loss better than 20 dB in the passband, and therelative bandwidth of 2.1% at a center frequency of 1.42 GHz.