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In the past several decades on-chip dimensions have scaled over 2000X, while dimensions on printed circuit board have scaled 4-5X. This modest scaling of packaging dimensions has severely limited system scaling. To address this, we have proposed a disruptive package-free integration scheme. We replace the traditional organic printed circuit board (PCB) with silicon interconnect fabric (SiIF) and replace...
The development of left-handed circularly polarized (LHCP) X-band printed antenna for microsatellite data communication is presented. The antenna which takes a circular shape with ellipse-shaped truncation is designed to resonate at the frequency of 8.2GHz with the minimum axial ratio bandwidth of 400MHz. The proposed antenna is deployed on a 1.6mm thick NPC-H220A dielectric substrate. The realized...
This paper presents a slotted-rectangular patch antenna with proximity-coupled feed operated at dual band of millimeter-wave (mmV) frequencies, 28GHz and 38GHz. The antenna was built in multilayer substrate construct by 10-layers Low temperature Co-fiber Ceramic (LTCC) with 5 mils thickness each. The slotted-patch and thick substrate are configured to enhance the bandwidth and obtain a good result...
This paper deals with design of Goubau PCB antenna as partial discharge (PD) detector. In the design, Goubau PCB antennas are simulated with a variety of shapes and sizes by using software for antenna design and simulation based on finite element method. The antennas are designed to achieve ultra wide band partial discharge frequency range. Goubau PCB antenna is designed with the type of substrate...
Virtual Network Embedding (VNE) is widely considered as a longstanding challenge in Network Virtualization: how to efficiently embed multiple virtual networks (VNs), with node-link resource requirements, onto the shared substrate network (SN), having finite underlying resources. Most heuristic VNE algorithms in the literature, only considering single network topology attribute and local network resources,...
A simple yet efficient substrate integrated waveguide (SIW) crossover circuit is presented. It is formed by excitation of two orthogonal full-wavelength (TE102-mode) resonators whose centers coincide with that of the symmetric SIW cross junction. Half-wavelength (TE101-mode) resonators are added in all four ports to increase bandwidth. The SIW crossover is designed to operate at 24.75 GHz with a bandwidth...
This paper proposes a new low-profile high-gain wideband gradient refractive index (GRIN) lens fed by a magnetic-electric (ME) dipole antenna. As a constituent part of this lens, a novel sub-wavelength nonresonant metamaterial unit cell composed of 3-layer substrates is also proposed. By applying Rogers 5880 and air as the top and bottom layers, high and low refractive indexes can be achieved for...
The next generation of wireless communications is the horizon, and the telecoms world is waiting to see exactly at which frequencies 5G will be implemented. Despite some unknowns and technological challenges, it is increasingly becoming clear that the millimeter-wave will be a key enabler for 5G by allocating more bandwidth to deliver faster, higher-quality video, and multimedia content and services...
In this paper antenna on silicon is presented. This paper proposes design of micro strip antenna on silicon with improved bandwidth. Proposed antenna is for X-band frequency. To improve bandwidth, ground defect being created on silicon substrate. With this we are improve bandwidth by 4–8 times. Designed verified both in HFSS simulation tool and on VNA after fabricating device.
InAlGaAs/InP p-i-n photodiodes epitaxially grown on silicon substrate with a dark current density as low as 1.3 mA/cm2 at −3 V are demonstrated. Responsivity, bandwidth, and output power at 1-dB compression are 0.76 A/W, 8 GHz, and −3.4 dBm, respectively.
The utilization of Electromagnetic band gap in microstrip antenna design becoming most popular. This periodic structure interacts with electromagnetic waves. It characterized by frequency stop-band, pass bands and band gap. Its application seen in filter designs, gratings, frequency selective surfaces, photonic crystal band gap, etc. The EGB structure reduces surface wave level, back lobes and improve...
This paper presents the design of a novel microstrip divider/combiner using T-type networks. Multiple step dividers were analyzed and designed, starting from the S-parameters representing the N-ports, their electrical specifications, and ending with full-wave simulations. We present here, two different designs with this technology, for 4 and 8 output ports. To validate the design, two prototypes working...
This paper proposes a single-feed, compact, metasurface-based antenna with circularly-polarized (CP) radiation for the Global Positioning System (GPS) receivers. The antenna consists of a square patch on the metasurface, which is a periodic lattice of 4 × 4 square metallic patches arranged on a grounded dielectric substrate. The CP radiation is obtained by truncating corners of the patch radiator...
Big Data concerns processing of large volumes of digital data with high velocity and variety. Big Data technologies allow the analysis of data in real time, which is critical for various eScience applications. In order to meet the growing demand of Big Data applications, the infrastructures must be flexible enough to adapt to the characteristics of the applications. Most of the solutions presented...
The virtual networking embedding (VNE) problem is a core issue in network virtualization. This is also a challenging problem as it contains different kinds of constraints, and its complexity becomes even higher in an online VNE problem with thousands of virtual network (VN) requests. In this paper, we proposed an ant colony system based VNE algorithm, called ACS-VNE, for the online VNE problem. The...
This paper proposes a compact circularly-polarized (CP) Substrate Integrated Waveguide (SIW) cavity antenna for 5G application operating in 28 GHz band. The antenna consists of a patch with perpendicular-arrows-shaped on a SIW structure. Longitudinal slot etched on the SIW top metallic surface are also used to excite the radiator. The CP radiation is obtained by using a three-quarters-circle-shape...
In the next generation mobile network, the concept of virtual network slice (VNS) has been proposed to facilitate the building of a dedicated and customized logical network with isolated resources, which can be defined as a subset of network resources allocated to a virtual operator or service provider. Each VNS is associated with a virtual network function forwarding graph (VNF-FG) to accomplish...
Virtual Network Embedding (VNE) problem has been widely considered as an important challenge in Network Virtualization (NV): how to embed virtual networks onto the shared substrate network effectively and efficiently. Previous VNE algorithms, only considering single network topology attribute and local resource of each node, may lead to inefficient resource utilization of the substrate network in...
A broadband rat-race coupler is proposed with planar configuration. Stepped-impedance and coupled transmission lines are utilized. Due to the symmetric structure, it is easy to design such a component by the even-/odd-mode analysis. A prototype is optimized to demonstrate our idea. The central frequency is 1.37 GHz with a 52% relative bandwidth. The return loss and port isolation are both better than...
A millimeter-wave series-parallel differential-fed patch antenna array is presented, where the intrinsic field distribution of TE20 mode in substrate integrated waveguide (SIW) is used to conveniently implement dual-slot feeding. One 28 GHz patch antenna element fed by TE20-mode SIW is firstly designed, achieving simulated 10-dB impedance bandwidth of 10.2% and peak gain of 6.48 dBi. A 4 × 4 array...
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