List of Articles BandPass Filter (BPF)

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  1 - Design and Fabrication of Novel Single- and Dual-band Bandpass Filters with Modern Zero-Degree Feed Structure for Wireless Communications
  Mohammad Reza Zobeyri Ahmadreza Eskandari
  In this paper, there are three novel bandpass filters (BPFs), consist of single- and dual-band, presented in a same size, which all the filters, have been designed, optimized and finally fabricated and measured, based on a primary structure and using planar microstrip t More

  In this paper, there are three novel bandpass filters (BPFs), consist of single- and dual-band, presented in a same size, which all the filters, have been designed, optimized and finally fabricated and measured, based on a primary structure and using planar microstrip technology. Each of the generated passbands, is resonated by the use of one of the two existing types of resonator structures. The larger resonators, as main-structures of the filter with a stepped-impedance features, by appling 0°-feed structure and electrical coupling in-between, create the first passband at 0.9 GHz. The smaller resonators as sub-structures, with dual-spiral topology, are in the same size and uniform-impedance, and with symmetrical feeding and internal coupling, are embedded in the main-structures to generate and control the higher passband at 1.8GHz. The existence of a cross-coupling between the sub-structures, suppresses any harmonics in the stop-band and generates additional transmission zeros on both sides of the upper passband. Overal dimensions of the innovative filters with a miniaturizing approach, are reduced from 0.163λg*0.09λg to 0.092λg*0.08λg in terms of the guided wavelength, which is the most compacted structure compared with other filters. According to 0.7 dB and 0.5 dB, the obtained insertion losses of the first and second passbands of the dual-band BPF respectively, the lowest losses have been achieved, compared with other examined dual-band BPFs. Finally three prototypes for global systems for mobile communication, were fabricated and measured. A good agreement between the measured and simulated results indicates realizing the goals and ingenious methods of this design. Manuscript profile
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  2 - Design and Simulation of a Novel UWB Bandpass Filter with Sharp Roll-Off, Compact Size and Wide Upper Stopband based on a Multiple-Mode Resonator
  Seyyed Jamal Borhani Mohammad Amin Honarvar Abdolmehdi Dadgar Pour
  In this paper, a novel microstrip-line ultra-wideband (UWB) bandpass filter (BPF) based on multiple-mode resonator (MMR) is designed, analyzed and simulated. The structure of the proposed MMR constructed by a modified triple-mode stepped-impedance resonator (MSIR) loade More

  In this paper, a novel microstrip-line ultra-wideband (UWB) bandpass filter (BPF) based on multiple-mode resonator (MMR) is designed, analyzed and simulated. The structure of the proposed MMR constructed by a modified triple-mode stepped-impedance resonator (MSIR) loaded with a folded step-impedance stub (FSIS). This stub-loaded resonator could generate two more resonate modes and two transmission zeros (TZs) simultaneously. Proposed MMR’s dimensions properly tuned so that first five resonate modes of the proposed MMR roughly allocated in the desirable bandpass, i.e. 3.1-10.6GHz, as well as two TZs at the edge of the passband, leading to sharp roll-off. Finally, with using aperture-backed interdigital-coupled lines for feeding, an UWB BPF with compact size, high selectivity, good performance in-band, and wide stopbands is obtained. Simulation results are in excellent agreement with UWB BPF ideal case. Manuscript profile