نتایج جستجو برای: ساختار باند ممنوعه الکترومغناطیسی ebg
تعداد نتایج: 66095 فیلتر نتایج به سال:
This paper presents an innovative design of a hybrid electromagnetic bandgap (EBG) structure based on nonuniform period and dimensions. A high rejection bandwidth is achieved when the nonuniform period and the dimensions follow the Kaiser distribution. The EBG structures are fabricated on the transmission line and the ground plane, where the offset is one-quarter of the EBG period. The measurem...
This article presents the design, simulation and testing of an Ultra Wide Band (UWB) planar monopole antenna with WLAN band-notch characteristic. The proposed antenna consists, the combination of planar monopole antenna with partial ground and a pair of AMC structures. The AMC structure used for the design is mushroom-like. Design equation of EBG parameters is also proposed for FR4 substrate us...
A novel design of an electromagnetic bandgap (EBG) structure based on the uniplanar compact EBG (UCEBG) concept is proposed in this paper. The structure is realized by inserting splitring slots inside two reversely connected rectangular patches, which is known as a split-ring slotted electromagnetic bandgap (SRS-EBG) structure. The bandgap properties of the EBG structure are examined by the sus...
This paper introduces a novel approach to create notch band filters in the front-end of ultra-wideband (UWB) communication systems based on electromagnetic bandgap (EBG) structures. The concept presented here can be implemented in any structure that has a microstrip in its configuration. The EBG structure is first analyzed using a full wave electromagnetic solver and then optimized to work at W...
In this paper, we have synthesized oligomers of epibromohydrine (EBG) with benzimidazole (BIZ) for the first time. According to spectroscopic studies and the dependence of the reaction rate on the ratio of the starting materials, the temperature the mechanism and kinetics of the objective laws of synthesis processes were established. It was established for the first time that in the interaction...
Electromagnetic Band Gap (EBG) structures are nonperiodic structures that show unique electromagnetic features, such as frequency band gap for surface waves and in-phase reflection coefficient for incident plane waves, which makes them desirable for low-profile antenna designs. A very innovative topic for antenna scientists and engineers are the applications of EBG structures in antenna designs...
In this study, we propose a segment substitution method (SSM) for the fast analysis of non-periodic electromagnetic bandgap power distribution network (NP-EBG PDN) in high-speed packages and printed circuit boards (PCBs). The proposed SSM is based on hybrid desegmentation segmentation methods, analytical equations an EBG structure that are derived herein. verified using full-wave simulations me...
بره ها، بلورهای فوتونی دو بعدی هستند که ضخامت آن ها در جهت عمود بر صفحه تناوب محدود شده است و به دلیل داشتن گاف فرکانسی شبه سه بعدی و امکان ساخت آن ها با فن-آوری های موجود، مورد توجه قرار گرفته اند. با برهم زدن تناوب شبکه ی بلور فوتونی، می توان یک کاواک به وجود آورد. این کار را می توان با تغییر جنس یا اندازه ی یکی از حفره های شبکه انجام داد. ایجاد نقص نقطه ای در بره ها، موجب به وجود آمدن مدهای ...
در دهه اخیر، ساختار فراماده الکترومغناطیسی توجه زیادی را در فیزیک و جوامع مهندسی به خود جلب کرده است. فراماده ساختاری است الکترومغناطیسی با خصوصیات همگن ومصنوعی که دارای خواص غیر عادی می¬باشد. این ساختارضریب گذردهی الکتریکی منفی و ضریب نفوذپذیری مغناطیسی منفی دارد و تحت عنوان ساختار چپگرد شناخته می¬شود. ابعاد سلولی آنها از طول موج کوچکتر است. این ساختار در طبیعت یافت نمی شوند. انتشار امواج در ا...
A novel wideband uniplanar electromagnetic bandgap structure with curved line bridges (C-EBG) is proposed to be used in power planes for suppressed ground bounce noise (GBN) and improved signal integrity. Compared with a conventional uniplanar electromagnetic bandgap structure with straight line bridges (S-EBG), the CEBG structure significantly increases the equivalent inductance with less spli...
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