A simple microstrip line fed antenna with thin substrate is proposed in this letter for multi-band wireless applications. The multi-band characteristic was achieved by overlapping an annular slot antenna with two concentric fan shaped patches. The antenna demonstrates three wide impedance bandwidths (VSWR ≤ 2) of 36.3, 63.4 and 25.5% with stable polarization and radiation characteristics.

A compact, coplanar waveguide (CPW) fed asymmetric slot antenna with dual operating bands is proposed. The slot is modified rectangular in shape and asymmetrically cut in the ground plane. A hexagonal patch fed by a two-step CPW is used to excite the slot. The feed itself is slightly asymmetric (shifted, with unequal ground planes). The asymmetric cuts on the slot together with the feed line as...

In this series of two articles, we consider the propagation of a time harmonic wave in a medium made of the junction a half-space (containing possibly scatterers) with a thin slot. The Neumann boundary condition is considered along the boundary on the propagation domain, which authorizes the propagation of the wave inside the slot, even if the width of the slot is very small. We perform a compl...

A load-balanced two-stage switch can eliminate the scheduler, is scalable, and provides close to 100% throughput. Its major problem is that packets can be mis-sequenced. Aim at preventing packets from being received out-of-sequence at outputs, we provide an elegant solution to the mis-sequencing problem based on a novel two-stage switch architecture with feedback. The feedback path is construct...

In this article, an open slot split ring resonator (OSSRR) is introduced to realize a composite right/left handed (CRLH) transmission line structure in microstrip technology. The CRLH line is synthesized by etching OSSRR in the ground plane and interdigital capacitor in the microstrip line. Simulated and measured scattering parameter of the structure is presented. The dispersion characteristic ...

1— The non-fragmentable nature of Ethernet data frames, as well as operation of the priority oriented packet schedulers in the Optical Network Units (ONUs) along with heavy network load conditions and the lack of detailed knowledge about the queues composition at the Optical Line Terminal (OLT) level, result in the creation of upstream channel slot remainders. Non-preemptive packet schedulers a...

Abstract—In this paper, a single layer 4× 4 U-slot patch antenna array based on differential feed was developed to achieve a wide bandwidth and low cross polarization with a simple feed network. A U-slot was cut on a radiation patch to realize a wideband performance, and a microstrip-line fed structure was adopted to make the patch and feed network placed in a single layer. In order to reduce e...