An ultra-wideband (UWB) printed monopole antenna with dual band-notched characteristics is proposed. Two spiral electromagnetic-bandgap (EBG) structures placed on the front and back side of the substrate are employed to create two notch bands at 5.2 and 5.8 GHz for the lower and upper bands of the wireless local-area network (WLAN), respectively. The notch-frequency can be tuned, and the band w...

Problem statemet: Wideband compact antenna is highly demandable due to the dynamic development in the wireless technology. Approach: A simple, compact EBG microstrip antenna is proposed in this study that covers a wideband of 250 GHz and the design is conformal with the 2.45 GHz ISM band (WLAN, IEEE 802.11b and g)/Bluetooth/RFID applications. Results: A 6×6 array of square unit cell formed the ...

Title of Dissertation: ELECTROMAGNETIC INTERFERENCE REDUCTION USING ELECTROMAGNETIC BANDGAP STRUCTURES IN PACKAGES, ENCLOSURES, CAVITIES, AND ANTENNAS Baharak Mohajer Iravani, Doctor of Philosophy, 2007 Dissertation Directed By: Associate Professor Omar M. Ramahi, Mechanical Engineering Department Electrical and Computer Engineering Department Electromagnetic interference (EMI) is a source of n...

Twenty years ago a study was initiated (Hall and Hart1 1974) whose purposes were to understand the evolutionary potential that lay within the genome of an organism, and to understand the processes and mechanisms by which the organism could exploit that potential to adapt to new selective pressures (Hall 1990). That study exploited the ebg operon of Escherichia coli K 12. The ebg operon encodes ...

In recent years, microstrip antennas become very popular because of their interesting advantages of low cost, low profile, light weight, easy fabrication and ease of analysis. Electromagnetic Band Gap (EBG) substrate is used as a part of antenna structure to improve the performance of the patch antenna. Usually, the performance of a patch antenna depends on the parameters such as Return Loss (R...

A 6 : 1 unequal Wilkinson power divider that combines the advantages of a coplanar waveguide with an electromagnetic bandgap (EBG CPW) and microstrip line structures suitable for a PCB circuit design is proposed. The highly characteristic impedance transmission line (TL) is realized by employing the proposed EBG CPW structure, which is difficultly achieved using the conventional microstrip line...

In this paper, a tree-shaped power distribution network is designed based on constructal theory for planar EBG structure power plane on PCB, in order to optimize DC performance. Planar EBG structures suppress noise, and the network provides currents to them. This network is composed of hierarchical metal paths. The geometric parameters can be optimized based on the concept of constructal theory...