A compact dual-band bandstop filter with defected microstrip slot

摘要

To investigate a compact dual-band bandstop filter (DBBSF), a defected microstrip structure is proposed in this paper. The filter is composed of a spur-line structure and a rectangle slot. Resonant frequencies and the bandwidths of the filter can be adjusted by changing the length of the slot. The frequencies of designed DBBSF are operated at 2.12 and 2.9 GHz. A fabricated sample has been tested to verify our design. Measured and simulated results are in good agreement. The proposed filter is much more efficient than other similar structures.