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In this paper, we propose a new miniaturized dual band frequency selective surface (FSS) for Wi-Fi applications. The proposed FSS possesses 0.42 GHz and 0.30 GHz bandwidths with insertion loss less than −15 dB around the two central operating frequencies 2.4 GHz and 4.6 GHz, respectively. The FSS exhibits excellent miniaturization with 0.057⋋1 × 0.057⋋1 or 0.11⋋2×0.11⋋2 unit cells, where ⋋1 and ⋋2...
In this letter, a new sort of second-order band-pass frequency selective surface (FSS) with patch-wire-patch elements arranged in triangular grid is proposed. The compact FSS has the merits of broadband response. The −0.5dB bandwidth reaches up to 40.3% and the −3dB bandwidth reaches up to 66%. Moreover, the proposed FSS owns its advantages of miniaturization and excellent insensitivity to incident...
A dual-passband frequency selective surface (FSS) is presented. The complementary square loop resonators are used in each unit cell to obtain dual-passband response. The proposed FSS structure is independent of incident wave polarizations and angles because of centrosymmetric of the unit cell. The FSS exhibits dual-band response with −3dB bandwidth of 5.39GHz-6.31GHz and 11.85GHz-15.04GHz, respectively...
The FCC in the U.S. has recently increased the amount of spectrum available for wireless broadband data services by permitting unlicensed access to television white-spaces. While this additional unlicensed spectrum allows for market expansion, it also influences competition among providers and can increase congestion (interference) among consumers of wireless services. We study the value (social welfare)...
We improve Gaussian processes (GP) classification by reorganizing the (non-stationary and anisotropic) data to better fit to the isotropic GP kernel. First, the data is partitioned into two parts: along the feature with the highest frequency bandwidth. Secondly, for each part of the data, only the spectrally homogeneous features are chosen and used (the rest discarded) for GP classification. In this...
We consider a wireless network in which multiple users share a common spectrum band, modeled as a Gaussian interference network. Our objective is to choose the transmit power spectral density of each user to maximize the sum rate, subject to individual power constraints at each transmitter. This includes frequency-orthogonal transmissions and full-spreading with power control as special cases. Assuming...
First we analyze the shortcomings of existing routing protocols in intermittently connected mobile networks (ICMN) such as high delivery delay, low success rate and cannot adaptive to the different network environment. With this in mind, we propose a new routing scheme called adaptive multiple copy multiple hop algorithm (AMM). By collecting the simple information about the status of the network,...
It has been widely recognized that the current under-utilization of spectrum across many bands could be alleviated through the application of spectrum markets. So far, discussions of market mechanisms for spectrum allocations have focused primarily on secondary markets, which are managed by licensees. Here we explore the consequences of lifting current restrictions on allocations and ownership, and...
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