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We analyze and measure the performance metrics for a free-space communication link using OAM beams with non-zero radial index p. The received power of OAM beams with p=1 is ∼6 dB higher than p=0.
In this letter, we design an external invisibility cloak that has the cloaking performance for various scattering objects positioned in the outer canceled air layer. The external cloak has an arbitrary geometry, and the “anti-objects” that embedded in the negative index shell can keep the same shape without being geometrically transformed. Compared to the traditional cloak, the external cloak has...
Aimed at the amount of aggregation graphs produced by the dimension which the user is interesting on the multidimensional moving object network. By introducing the idea of graph index, we put forward of the structure data query algorithm MCPath to solve the problem of querying the interesting structure data on specific dimension. MCPath algorithm decomposes the query structure to the shortest paths,...
By employing composite right/left handed transmission line (CRLH-TL) structure, the proposed antenna for wireless universal serial bus (USB) dongle applications can provide two wide operation bands (746–960 and 2500–2690 MHz) to cover the LTE700/GSM850/900 and the LTE2500 operation. The proposed antenna utilizing a limited space of 12 × 28 × 5.8 mm3 consists of a folded monopole and a CRLH-TL structure...
Capability-Based requirements management and planning thoughts and methods have gone increasingly deep into the development of Weapon System-of-Systems (WSoS). In the traditional top-to-bottom capability requirement planning (CRP) methods, the constraints among different capabilities indexes acquired from the tasks decomposition are neglected, which leads to the irrationalities and conflicts between...
The thoughts and methods of Capability-Based requirement analysis have gone increasingly deep into the development of Weapon System-of-Systems (WSoS). Effective analysis and programming of capability are fundamental tasks for requirement analysis of WSoS. Under the background of operation, there are repeating capabilities among different operational tasks. Acquiring Capability Index Requirements (CIRs)...
In the past decade, left-handed metamaterials (LHMs), which were first named and theoretically discussed by Veselago [1], have been extensively studied throughout the world. They are composed of arrays of split-ring resonators (SRRs) and wires [2], [3] which exhibit negative permittivity and permeability, respectively. The first LHM was constructed and experimentally demonstrated by Smith et al. in...
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