Tapered dual-plane compact electromagnetic bandgap microstrip filter structures

3D-Printed Electromagnetic Band-Gap Band-Pass Filter Based on Empty Single-Ridge Waveguide

“…To solve this problem an impedance matching using a Chebyshev transformer was carried out in [28]. In this present work, to figure out this issue, tapering techniques are used [35], managing to improve the levels of return losses in the entire filter pass band and to reduce the total size of the structure compared to that presented in [28].…”

Broadband choke structure using composite right/left-handed coaxial line

“…Electromagnetic bandgap (EBG) structures have been proposed in [4,5,6,7]. The EBG structure does not operate at a single frequency but in a frequency bandwidth that can be designed.…”

“…The EBG structure does not operate at a single frequency but in a frequency bandwidth that can be designed. Therefore, the EBG structure has been applied for the suppression of noise on the dielectric substrate [4], reduction of mutual coupling between antennas [5], and the filter with ultrawide band [6]. A composite right/left-handed (CRLH) transmission line (TL) has the EBG frequency region, whose bandwidth can be designed by the transmission line theory [7,8].…”

Miniaturized lowpass filter with ultra-wide stopband using dual-plane defected structures

“…In many microwave applications, there is a great requirement for the LPF with a compact size, steep rejection and wide stopband. Due to their prominent stopband, electromagnetic band-gap (EBG) structure, defected ground structure (DGS) and defected microstrip structure (DMS) have been widely employed to implement the abovementioned LPF [1,2,3,4,5,6,7,8,9].…”

“…However, a large num of the structure unit are often required to provide a good stopband, causing a relatively large physical size. It is found that the dual-plane configuration may be a good solution to the size reduction of the LPF [8,9]. For instance, a wide stopband is achieved within a small circuit area in [9] by adding spurline and open stubs to the dual-plane EBG structure.…”