Balanced bandpass filter with tunable centre frequency based on substrate integrated waveguide technology

作者：Zhang, Hao; Kang, Wei^*; Wu, Wen

来源：Electronics Letters, 2018, 54(14): 886-887.

DOI：10.1049/el.2018.0273

• band-pass filters
• substrate integrated waveguides
• cavity resonator filters
• slot lines
• permittivity
• band-stop filters
• RO5880 substrate
• tunable centre frequency
• substrate integrated waveguide technology
• mechanical tuning balanced bandpass filter
• substrate integrated waveguide dual-mode resonant cavity
• open-loop slots
• square SIW cavity
• centre area
• resonant frequency
• degenerated modes
• direct source-load couplings
• differential mode passband
• DM
• metallised via-holes
• TE201 modes

A mechanical tuning balanced bandpass filter based on substrate integrated waveguide (SIW) dual-mode resonant cavity is presented. It can be accomplished by placing two metallised via-holes with open-loop slots on the top layer which affect the TE102 and TE201 modes of the square SIW cavity, respectively. Direct source-load couplings have been utilised to achieve the high selectivity of the differential mode (DM) passband and improve the DM out of band rejection. A planar module of 60 x 60 mm(2) has been fabricated on RO5880 substrate with a dielectric constant of 2.2 which verify the design concept.

• 出版日期2018-7-12
• 单位南京理工大学