A Miniaturized Dual-Band Bandpass Filter Using Embedded Resonators

作者：Hsu Cheng Ying^*; Chen Chu Yu; Chuang Huey Ru

来源：IEEE Microwave and Wireless Components Letters, 2011, 21(12): 658-660.

DOI：10.1109/LMWC.2011.2172592

• Bandpass filter (BPF)
• dual-band
• embedded resonator
• microstrip
• open-loop ring resonator

A compact microstrip dual-band bandpass filter (BPF) using the embedded open-loop ring resonator is proposed. The filter can achieve two passbands without using the external dual-band impedance transformer in the input/output feeding line. Furthermore, by using the developed design method, the ratio of the first passband to the second passband can be controlled. A compact microstrip dual-band BPF operated at 2.45/5.7 GHz is demonstrated. The designed filter has low insertion loss, high rejection between the two passbands, and a very small size of 11.5 x 4.65 mm(2) (0.094 lambda(0) x 0.039 lambda(0)), lambda(0) being the free-space wavelength of the center operating frequency of the 2.45 GHz. The good agreement between simulation and measurement is obtained.

• 出版日期2011-12