Abstract
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 × 4.65 $ mm 2 (0.094λ 0 × 0.039 λ 0), λ 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.
Original language | English |
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Article number | 6074966 |
Pages (from-to) | 658-660 |
Number of pages | 3 |
Journal | IEEE Microwave and Wireless Components Letters |
Volume | 21 |
Issue number | 12 |
DOIs | |
Publication status | Published - 2011 Dec |
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Electrical and Electronic Engineering