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Design of balanced band pass filters with one transmission zero using an asynchronously coupled dual-mode resonator

Author

Listed:
  • Miguel-Antonio Romero-Ramirez
  • Tejinder Kaur Kataria
  • Jose-Luis Olvera-Cervantes
  • Alonso Corona-Chavez

Abstract

A novel quasi-elliptic balanced bandpass filter (BBPF) designed on microstrip technology that uses Asynchronously Coupled Dual-Mode Resonator (ACDMR) is proposed. The filter is based on a novel Balanced Asynchronous Box (Basybox), which has five couplings and three resonators (two λ/2 resonators and a dual-mode grounded λ/2 resonator). By changing a conventional triplet with the use of dual-mode resonators, we can generate a non-resonant mode that generates a transmission zero (TZ). In addition, the filter has a balanced response. In this paper, full design methodology is presented along with a practical implementation. The filter has a center frequency in differential-mode of 950 MHz, a bandwidth of 53 MHz and a transmission zero at 975 MHz. For the common-mode, there is a rejection higher than 15 dB throughout the band up to 3 GHz. Good agreement between simulation and measurement is observed.

Suggested Citation

  • Miguel-Antonio Romero-Ramirez & Tejinder Kaur Kataria & Jose-Luis Olvera-Cervantes & Alonso Corona-Chavez, 2023. "Design of balanced band pass filters with one transmission zero using an asynchronously coupled dual-mode resonator," Journal of Electromagnetic Waves and Applications, Taylor & Francis Journals, vol. 37(16), pages 1341-1349, November.
    • Handle: RePEc:taf:tewaxx:v:37:y:2023:i:16:p:1341-1349
    DOI: 10.1080/09205071.2023.2240315
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