Triple-Mode Substrate Integrated Coaxial Resonator Based Bandpass Filter Featuring Flexible Transmission Zeros and Adjustable Bandwidth

Fully shielded and self‐packaged compact quarter‐mode substrate integrated coaxial line bandpass filter for X and K ‐band

“…Furthermore critical services such as aerospace and defense are deployed in either a portion or all of the X, K u and K frequency bands for satellite and RADAR communication. [1][2][3] In these microwave/millimeter systems, bandpass filter (BPF) serves as an integral element in the design of the RF front end. The significance of bandpass filter in the modern day communication systems drives the designer to model and characterize bandpass filters using important tools such as the even-odd method, 4 evaluation of transfer function to analyze the frequency behavior 5 and study the individual resonator 6 to model and design the bandpass filter with the required functionality and characteristics.…”

“…In order to combat with external electromagnetic interference and reduce unwanted crosstalk with neighboring components on board there has been special emphasis on electromagnetic compatibility and shielding in high frequency electronic circuits. Furthermore critical services such as aerospace and defense are deployed in either a portion or all of the X, and frequency bands for satellite and RADAR communication 1–3 . In these microwave/millimeter systems, bandpass filter (BPF) serves as an integral element in the design of the RF front end.…”

“…The significance of bandpass filter in the modern day communication systems drives the designer to model and characterize bandpass filters using important tools such as the even‐odd method, 4 evaluation of transfer function to analyze the frequency behavior 5 and study the individual resonator 6 to model and design the bandpass filter with the required functionality and characteristics. Another important tool that is used to design the bandpass filter is the coupling matrix technique 3 which helps in understanding the magnitude and nature of coupling between an inter‐coupled resonators of a multimode bandpass filters. Few other techniques such as extracting lumped element model 7,8 and transmission line model 9 for microwave based distributed networks have been discussed.…”

Compact triple‐mode bandpass filters based on single perturbed substrate integrated waveguide cavity using coaxial feed

“…[1][2][3][4][5] Using multi-mode cavities is a typical strategy to design SIW BPFs with compact size because BPFs based on a multi-mode cavity usually have a smaller size than those based on several cavities supporting only one resonant mode. [6][7][8][9][10][11][12][13][14][15][16] Here are some typical pioneering designs. Dualmode SIW BPFs can achieve a flexible response.…”

“…The substrate integrated coaxial resonator, as a hybrid structure composed of SIW and coaxial line, was used to achieve a triple-mode BFP with flexible FTZ and BW. 16 The triple-mode balanced BPF used the first three modes of the half-mode SIW cavity to achieve common-mode suppression. 17 A triple-mode filter with novel high performance is designed by a dual-mode SIW cavity loading a uniform impedance resonator.…”