Design of Dual-Band BPF Using Mutual Couplings and Spiral Resonators

In this paper a new dual-band BPF was designed for WLAN and WiMAX systems using mutual couplings and spiral resonators. By designing proposed resonator, the center frequency in the first pass band was set according to WLAN standards while multi-coupled structure was used to adjust the center frequency in the second pass band base on the WiMAX standards. Then, using spiral resonator a transmission zero was added to the interval between the two pass bands in order to achieve the desirable frequency response. A performance analysis of the dual-band filter with the center frequencies at 2.4 GHz and 3.7 GHz indicated band pass losses of -0.34 dB and -0.49 dB, respectively.

کلیدواژه ها:

stepped impedance resonator (SIR) ، dual-band bandpass filter (BPF) ، spiral resonator ، mutual couplings