Differential substrate integrated waveguide bandpass filter with improved common-mode suppression utilising complementary split-ring resonators

作者：Zhang, Hao^*; Kang, Wei; Wu, Wen

来源：Electronics Letters, 2017, 53(7): 508-510.

DOI：10.1049/el.2016.4192

• substrate integrated waveguides
• band-pass filters
• waveguide filters
• cavity resonator filters
• microwave filters
• differential substrate integrated waveguide bandpass filter
• improved common-mode suppression
• TE102-mode cavities
• common-mode signal reduction
• CM signal reduction
• differential-mode signal
• transmission zeros
• dual-mode cavity cross coupling
• symmetrically etching complementary split-ring resonators
• symmetrical plane
• frequency 8
• 07 GHz

A novel differential substrate integrated waveguide bandpass filter is proposed. The TE102-mode cavities arranged on the symmetrical plane could efficiently reduce the common-mode (CM) signal, meanwhile, transmitting the differential-mode signal. Additional transmission zeros have been obtained by using cross coupling in the dual-mode cavities. Moreover, by symmetrically etching complementary split-ring resonators on the bottom layer of the substrate, the CM could be suppressed whereas differential signals are not affected. To verify the above design concept, a prototype operating at 8.07 GHz has been realised and shows the desired filtering performance.

• 出版日期2017-3-30
• 单位南京理工大学