| Popis: |
In this paper, a folded stepped impedance resonator (SIR), modifled by adding an inner quasi-lumped SIR stub, is used as a basis block for a new implementation of dual-band bandpass fllters. The main advantage of the proposed fllter is to make it possible to independently control the electrical features of the flrst and second bands. The behavior of the flrst band basically depends on the geometry of the outer folded SIR. The second band, however, is strongly in∞uenced by the presence of the inner stub. Additional design ∞exibility is achieved by allowing the inner stub to be located at an arbitrary position along the high impedance line section of the main SIR. The position of the tapped input and output lines can be |
