1M. Makimoto, S. Yamashita. Band Pass Filters Using parallel-coupled strip line stepped impedance resonators[J]. IEEE Trans on MTT, 1980,28(12) : 1413-1417.
3Cristal E G,Frankel S.Hairpin-line and hylrid hairpinline/half-wave parallel-coupled-line filters.IEEE Trans.Microwave Theory Tech.,1972,20:719-728
4Sagawa M,Takahashi K,Makimoto M.Miniaturized hairpin resonator filters and their application to receiver front-end MIC's.IEEE Trans.Microwave Theory Tech.,1989,37..1991-1997
5Hsieh L H,Chang K.Compact lowpass filter using stepped impedance hairpin resonator.Electron.Lett.,2001,37(14):899-900
6Lee S Y,Tsai C M.New cross-coupled filter design using improved hairpin resonators.IEEE Trans.Microwave Theory Tech.,2000,48:2482-2490
