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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2012-10-11
A Bandpass Filter with Compact Size and Extended Stopband Using Closed-Loop Transmission-Lines and Short-Circuited Stubs
By
Johanny Alberto Escobar-Pelaez,

    Mr. Johanny Alberto Escobar-Pelaez

    Department of Electronics

    Instituto Nacional de Astrofísica, Óptica y Electrónica (INAOE)

    México

    Homepage

Jose Luis Olvera Cervantes,

    Dr. Jose Luis Olvera Cervantes

    National Institute of Astrophysics, Optics and Electronics (I.N.A.O.E)

    Mexico

    Homepage

Alonso Corona-Chavez,

    Dr. Alonso Corona-Chavez

    Instituto Nacional de Astrofisica, Optica y Electronica

    Mexico

    Homepage

Humberto Lobato-Morales

    Dr. Humberto Lobato-Morales

    Department of Electronics

    Instituto Nacional de Astrofísica, Óptica y Electrónica (INAOE)

    México

    Homepage

Progress In Electromagnetics Research Letters, Vol. 35, 83-88, 2012
doi:10.2528/PIERL12090309 | Google Scholar

Abstract
A novel 3-pole bandpass filter (BPF) based on microstrip loaded ring resonators (LRRs) is proposed. Each resonator is composed by a closed-loop transmission line and a short-circuited stub. By properly adjusting the impedance and the electrical length of each resonator, the proposed circuit may be made compact (over 93.7% smaller than a conventional ring resonator) and its stopband may be extended simultaneously. Each resonator exhibits an area of 0.0727 λg x 0.079 λg where λg is the guided wave length. A BPF at the center frequency of f0=1.9 GHz with stopband extended up to 7.8 GHz (=4f0) is developed showing good agreement between simulation and experimental results.
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Citation
Johanny Alberto Escobar-Pelaez, Jose Luis Olvera Cervantes, Alonso Corona-Chavez, and Humberto Lobato-Morales, "A Bandpass Filter with Compact Size and Extended Stopband Using Closed-Loop Transmission-Lines and Short-Circuited Stubs," Progress In Electromagnetics Research Letters, Vol. 35, 83-88, 2012.
doi:10.2528/PIERL12090309
References

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