Compact and Wideband 1-D Mushroom-Like Ebg Filters

Abstract

Abstract-A new wideband and compact bandstop filter using one dimensional (1-D) mushroom-like electromagnetic bandgap (EBG) structures is proposed in this paper. Although the proposed structure can not be fabricated as easy as defected ground structure (DGS) filters, it has several winning features such as more compactness, better characteristics and no backward radiation. A 5-cell 1-D mushroomlike EBG filter is compared with 5-cell and 9-cell circular DGS filters. The 1-D mushroom-like EBG filter is found to be more compact as it requires fewer cells for the same characteristics and also as it has 0.44 times shorter cell length. The proposed EBG filter has a 10-dB bandwidth of 39% while the 5-cell and 9-cell DGS filters have 10-dB bandwidth of 20% and 27%, respectively. Also, the 1-D mushroom-like EBG filter is studied for various number of cells and compared with a two dimensional (2-D) structure. The simulated and measured results are found to be in good agreement.

Practical Design of Filters Using Ebg Waveguides Periodically Loaded With Metal Ridges

“…The excellent properties of such structures are related to the propagation of slow waves, which are characterized by a reduced phase velocity and wavelength. Using periodic structures, and due to the dispersive behaviour of their slow waves, it is possible to achieve filters with improved stop-band performance and reduced size [1][2][3][4][5]. Although the reported applications of slow-wave structures have been mainly focused on planar technologies, recently, it has been shown how to obtain Electromagnetic Band-Gap (EBG) passive waveguide structures by including metal inserts in the E-plane of an above cut-off rectangular waveguide [6][7][8].…”

High Performance v-Band Gaas Low Noise Amplifier With Modified Coplanar Waveguide Ebg Transmission Lines Technology

“…Lumped inductors offer smaller area and larger quality factors than TLine based matching networks, but are more difficult to be precisely simulated at millimeter-wave band. Modified CPW for EBG-CPW TLines, on the other hand, can be considerably smaller than their conventional counterparts and exhibit high Q values [1,4,5].…”

An Embedded Isolation Moat Structures With Wide Stopband and Low Parasitic Effect for Elimination Simultaneous Switching Noise

“…Nevertheless the SSN could be transferred to outside of the slots through the connecting bridges. Electromagnetic band-gap (EBG) structure exhibits electromagnetic properties that have led to a wide range of applications to filter [5] and antenna [6]. Recently, EBG structure [7] and high-impedance surface (HIS) [8,9] are widely utilized in SSN suppression between power and ground planes in high-speed circuits.…”