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As the demand for refined spectrum management grows, the need for accurate and reliable radio monitoring data increases accordingly. In this context, the calibration of radio monitoring stations has become a routine work for efficient spectrum management. In this paper, an on-line measurement and calibration method in Open Air Test Site (OATS) is described, followed by experimental verification. The...
This paper provides an overview of radio spectrum monitoring in borderlands of China. Firstly research background, the motivation, accomplishments are described and then plans for future work in China are presented. Current radio spectrum monitoring systems are man-machine communication systems based on Radio Monitoring Transfer Protocol (RMTP), which are unable to detect and process the radio interference...
We proposed a novel micro strip sensor based on Dual-D shaped Complementary Split Resonator (Dual-D CSR) in the microwave region. In this research,the distribution of the electric field and transmission response (S21) have been simulated. Besides, we also investigated the effect of the width between Dual-D on resonance characteristics. Furthermore, the process and the performance is illustrated when...
According to Babinet's principle a square complementary asymmetric split ring resonator (caSRR) is proposed. Interestingly, due to the particularity of the caSRR structure, it can be fabricated on a mental sheet without the substrate, which is named as Stereo-caSRR. A microwave sensor which consists of a rectangular waveguide loaded with the square stereo-caSRR is designed. Simulation results show...
Based on the Babinet Principle, a new metamaterial sensor is proposed in microwave region. The main part of the device is a microstrip coupled complementary asymmetric double-split resonator (CADSR). In this device, an extremely sharp resonance have been obtained due to the excitation of “trapped modes”. From the analysis, the effect of the degree of asymmetry on the frequency response and Q-Factor...
Current radio spectrum monitoring systems are “man-machine” communication systems based on Radio Monitoring Transfer Protocol (RMTP), which are unable to detect and process the radio interference automatically. In this paper an automatic radio monitoring and early warning architecture based on C/S model and internet protocol is proposed. A pilot “machine-machine” system which consists of several sensor...
Graphene is a very promising optoelectronic material and has gained more and more attention. Due to the significance of computer-aided design of graphene, several simulation modeling methods have been developed. In this paper, a brief review of some widely used computational electromagnetic algorithms and corresponding software packages for graphene modeling is provided. The advantages and drawbacks...
Detection and direction finding of illegal emission source is the core issue of radio monitoring network. However, the performances of traditional fixed stations and mobile stations which are based on energy detection and work individually are often compromised with multipath fading and shadowing in urban environment. To mitigate the impact of these issues, a cooperative compressed spectrum sensing...
Multi-beam antenna is a special device which is capable of radiating electromagnetic energies in different directions. In this paper, a Mu and Epsilon-Near-Zero (MENZ) metamaterial multi-beam antenna based on two-dimensional LC network is designed. The equivalent node voltage distribution matrix of this device is derived and its performance is simulated. We show that the radiation characteristic of...
The urban overpass has developed rapidly with the acceleration of city construction. Ramp-bridge is different from other bridges about construction and stress. In this paper comparative analysis the result by establish finite element model aim at feature of ramp-bridge—cross slope, longitudinal, slope, curvature and stiffness of pier.
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