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In this paper, a five element log periodic array has been designed using inset fed triangular microstrip patches. Gap is introduced in the feed line to the elements one at a time. Best frequency independent response is achieved when the second element is fed using gap coupling between the frequency ranges of 6.8 GHz to 15 GHz. The effect of applying the gaps in the feed line has been studied theoretically...
The coarse-grained reconfigurable architecture(CGRA) has advantages over the traditional FPGAs in terms of delay, area and configuration time. DySER is a novel architecture of the CGRA, which can support both functionally specialization and parallelism specialization. In this paper, the relationship between the bandwidth, data transmission time and RC array scale of DySER-based platform have been...
Phased Array Doppler Sonars (PADS) have been developed at Scripps over the past 20 years. These provide sector-scan images of radial velocity and acoustic intensity over ranges of 0.1 m (medical ultra sound) to 1.5 km (ocean surface wave measurement). Most recently we’ve deployed a 200 kHz PADS from the R/V Revelle during EquatorMix (October 2012, at 140W on the Equator). The pie-shaped measurement...
Obtaining a high level of situation awareness while maintaining optimal utilization of resources is becoming increasingly important, especially in the context of asymmetric warfare, where information superiority is crucial for maintaining the edge over the opponent. Obtaining an adequate level of situational information from an ISR system is dependent on sensor capabilities as well as the ability...
In this paper, we propose a wideband microstrip line slot array antenna. A microstrip line slot array antenna is constituted by a slot fed in series using the microstrip line. This antenna has features that the feeding loss is small and it is easy to configure the array antenna of the multi-element. However, the bandwidth is narrow compared with a conventional parallel fed array antenna. To overcome...
In this paper, a novel probe-exciting feed structure was proposed for improving the bandwidth of a waveguide broad wall slot array antenna. Both a conventional inclined slot feed and the proposed one are applied to the design of the broad wall slot arrays with the same specification, respectively, and then, their results are compared by using the full-wave EM simulation. As expected, the bandwidth...
A low-profile, wideband, vertically-polarized antenna array with cardioid-shaped directional radiation characteristics in the azimuth plane is presented. The antenna is composed of four half loops with the shape of bent diamond arms that are fed at the center and short circuited to the ground plane at their ends. Two of the loops are fed in phase and the other two are fed out of phase. Then, these...
Although graphics processing units (GPUs) rely on thread-level parallelism to hide long off-chip memory access latency, judicious utilization of on-chip memory resources, including register files, shared memory, and data caches, is critical to application performance. However, explicitly managing GPU on-chip memory resources is a non-trivial task for application developers. More importantly, as on-chip...
An effective magnetic loop array antenna with modified feeding structure is designed, fabricated and tested. This antenna works at 4.83 GHz–5.04 GHz, and radiate omnidirectionally in the azimuth plane. Compared with the original effective magnetic loop array antenna, the bandwidth increases 3 times. The average gain is 5.65 dB, and the elevation angles at different frequencies are about 30 degrees...
A modal analysis method and a design approach for a compact broadband dual polarized end-launched coaxial transition into a dielectric-filled square waveguide are presented in this paper.
The next-generation System z design introduces a new microprocessor chip (CP) and a system controller chip (SC) aimed at providing a substantial boost to maximum system capacity and performance compared to the previous zEC12 design in 32nm [1,2]. As shown in the die photo, the CP chip includes 8 high-frequency processor cores, 64MB of eDRAM L3 cache, interface IOs (“XBUS”) to connect to two other...
Today many users depend on the mobile devices such as smartphone. One of the key challenges that have been identified is the need to enhance the operation of data transmission using Long term evaluation. We present the pathBeam, a new active smart tool for evaluating the available bandwidth on a LTE network path, to address this requirement. The pathBeam Mechanism is used for uplink and downlink transmission...
Given the scale of today's distributed storage systems, the failure of an individual node is a common phenomenon. Various metrics have been proposed to measure the efficacy of the repair of a failed node, such as the amount of data download needed to repair (also known as the repair bandwidth), the amount of data accessed at the helper nodes, and the number of helper nodes contacted. Clearly, the...
Machine learning, graph analytics and sparse linear algebra-based applications are dominated by irregular memory accesses resulting from following edges in a graph or non-zero elements in a sparse matrix. These accesses have little temporal or spatial locality, and thus incur long memory stalls and large bandwidth requirements. A traditional streaming or striding prefetcher cannot capture these irregular...
The need for novel data analysis is urgent in the face of a data deluge from modern applications. Traditional approaches to data analysis incur significant data movement costs, moving data back and forth between the storage system and the processor. Emerging Active Flash devices enable processing on the flash, where the data already resides. An array of such Active Flash devices allows us to revisit...
Vertical cavity surface emitting lasers (VCSELs) are the dominant source for optical data communication links in computer server, data center, and super computer applications. These applications demand higher bandwidth (> 20 Gbps), longer fiber propagation length (> 1 km), and lower power operation. There have been several reports of VCSEL modulation bandwidth in excess of 50 Gbps [1, 2] although...
In this paper, a 10.1 GHz fractal patch antenna using Low Temperature Co-Fired Ceramic (LTCC) Technology has been used. A Minkowski first iteration fractal micro strip patch antenna has been used in this design. However, a good agreement in terms of gain still did not achieved for X-band operation. To solve the problem, basic design is then be improve by using array concept to increase the antenna...
This paper presents design and development of wide band dual polarised active phased array antenna at C band generating 41 beams for Radar Imaging Satellite (RISAT). Large antenna array of size 6m×2m has been divided into smaller tiles and each tile has been fed by active distributed beam forming networks. Simulation & measured performance of the antenna has been presented meeting bandwidth of...
This paper presents a new wideband fixed phase shifter with substrate integrated waveguide. Inserting Air holes as a delay to create phase shift was presented before. But this paper applies from a new technique to insert the best count of Air holes and the best place of inserting Air holes. There is a direct relation between the counts of Air holes and the amount of phase shift. Two bits of phase...
Communication satellites in the geostationary orbit are highly susceptible to intentional and unintentional interferences. This paper brings forward the systems design of an array based on-board interference mitigation system with emphasis on broadcast satellites. A trade-off between different performance parameters and system constraints is provided. The operational aspects of the system are discussed...
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