Routing algorithm has been well studied as a hotspot in wireless Ad Hoc networks. However, due to the strictly limited resources, few routing algorithm take into account extending the network lifetime and achieves an ...
详细信息
For cable network fire detection system in intelligent building the existence of the problems that the information transmission is slow, the rate of miss/false alarm of fires is high, and detection and alarm of poison...
详细信息
We review the research progress on Yagi-Uda antennas starting from the very first paper published in an English journal in 1926, including theories, numerical simulations, and experiments. In this article, the typical...
详细信息
We review the research progress on Yagi-Uda antennas starting from the very first paper published in an English journal in 1926, including theories, numerical simulations, and experiments. In this article, the typical endfire antennas, Yagi-Uda and quasi-Yagi antenna, are reviewed. Many variant structures of the endfire antenna and how to improve bandwidth are also discussed. Finally, we presnet the further work about planar endfire antennas, Yagi-Uda and quasi-Yagi antenna.
In this paper, a modified planar balanced Vivaldi antenna with endfire characteristics near the metal surface is proposed for 6-18 GHz applications. The proposed antenna structure consists of three copper layers, amon...
详细信息
In this paper, a modified planar balanced Vivaldi antenna with endfire characteristics near the metal surface is proposed for 6-18 GHz applications. The proposed antenna structure consists of three copper layers, among which two external layers locate on the two outsides of two dielectric substrates, and the central layer is sandwiched by these two dielectric substrates. To further enhance the end-fire radiation characteristic, a number of novel techniques are proposed, including elongation and shaping of the supporting substrate of a conventional balanced antipodal Vivaldi antenna beyond its aperture, using an I-shaped slot loaded radiation patch and cutting a triangle on the edge of three copper layers. measured and simulated results show that the proposed antenna not only exhibits good impedance bandwidth, but also improves the end-fire performance in the operational frequency of 6-10 GHz and achieves high gain in the end-fire direction, low cross-polarization and high front-to-back (F-to-B) ratio.
This paper adopts the internationally acknowledged evaluation principles and profoundly builds up the comprehensive evaluation index system and objective function as for the problems of one-sidedness and subjectivity ...
详细信息
The Mie series has very important applications in electromagnetics(including optics).We employ a formulation for the Mie series which relies more on the derivatives of Legendre polynomials than Bessel *** formulas for...
详细信息
The Mie series has very important applications in electromagnetics(including optics).We employ a formulation for the Mie series which relies more on the derivatives of Legendre polynomials than Bessel *** formulas for derivatives related to Legendre polynomials are derived to realize the Mie series conveniently and to avoid treating special angles.
Integrating three-phase induction motor electromagnetic calculation program and multi-objective inverse optimization algorithm, a multi-objective & inverse three-phase induction motor optimization system with C++ ...
详细信息
Integrating three-phase induction motor electromagnetic calculation program and multi-objective inverse optimization algorithm, a multi-objective & inverse three-phase induction motor optimization system with C++ is realized. This system can optimal design three-phase induction motor automatically. The design examples verify the effectiveness of the system.
Precise instrument and high-precision machining require increasingly higher measurement precision. At present, the precision of grating Moir fringes measurement is not high. In this article, based on the original theo...
详细信息
LOG filter for image edge detection consists of Gaussian filter and Laplace operator. Based on the central limit theorem and the separating characteristic of two dimensional Gaussian filter, Gaussian approximation fil...
详细信息
this paper introduces a method of image encryption algorithm which was improved. Chaotic sequence is generated by the Logistic chaos mapping [1. Image encryption is realized by gray value of substitutes and pixel posi...
详细信息
暂无评论