BANDPASS FILTER USING A UNIT CELL OF A CRLH(COMPOSITE RIGHT/LEFT HANDED) TRANSMISSION LINE CAPABLE OF IMPROVING AN OUT-OF-BAND BLOCKING CHARACTERISTIC

摘要

PURPOSE: A bandpass filter using a unit cell of a CRLH(Composite Right/Left Handed) transmission line is provided to design a bandpass filter having an out-of-band blocking characteristic by serially connecting a plurality of unit cells of a CRLH transmission line.;CONSTITUTION: A unit cell(100) of a CRLH(Composite Right/Left Handed) transmission line having a bandpass filter function includes two series capacitors(103,104) having a series capacitance 2CL which includes an LH(Left-Handed) transmission line to act as the bandpass filter. The unit cell of the CRLH transmission line includes a parallel inductor(106) having a parallel inductance LL. The unit cell of the CRLH transmission line includes two series inductors(101,102) having a series inductance LR/2 forming a RH transmission line which is a parasitic component of the LH transmission line. The unit cell of the CRLH transmission line includes a parallel capacitor(105) having a parallel capacitance.;COPYRIGHT KIPO 2012