Abstract— Study of a novel planar circular disc monopole ultrawide-band antenna fed by coaxial line is presented in this paper. The radiator, ground plane and the feeder equipment of the antenna are placed on the same plate. The special structure reduces the spatial volume, and it is used to realize the miniaturization of the antenna. The basic theory and design method are analyzed, and detaile...

A Dual band reconfigurable microstrip antenna with frequency diversity for satellite communication is proposed. In this paper a reconfigurable antenna with stacked structure is used. The two patches are arranged by two substrates i.e.. one R04003 dielectric substrate and another Rohacell Foam substrate with the dielectric constant 1.04 and loss tangent 0.0027. By varying the height of foam subs...

The dual polarized reflector antenna used for satellite communications consists of two reflectors; one reflector is solid, the other consists of metal grid. The structure is complicated and the bandwidth is narrow. This antenna structure can be simplified by removing the metal grid and using the solid reflector together with a thin electromagnetic band gap material pasted to the surface of the ...

The performance of the Multicast Dissemination Protocol (MDP) in a simulated satellite channel is investigated. The environment that is modeled is that to be expected in a small satellite communications environment including channel errors and link interruptions. The satellite link is simulated with a channel environment simulator. The performance of MDP is compared with file transfer protocol ...

Low earth orbit (LEO) satellite has the advantages of global coverage, low propagation delay and low path losses, etc. Combined with orthogonal frequency division multiplexing (OFDM) transmission, LEO satellite system can support very high capacity suitable for wideband multimedia traffic. This paper analyzes the channel model and throughput for LEO OFDM satellite communication system. First, s...

In 2009, Chen et al. proposed a satellite communication system for mobile devices to achieve wide communication. In this scheme, there are some security loopholes that need to be fixed since the mobile device was stolen. Since a malicious attacker intercepts the mobile user’s information they can proceed with different attacks. Hence, we propose a novel scheme to improve the mobile user’s commu...

In this paper we focus on the modeling and evaluation of next generation satellite communications technologies to support future aeronautical communications. Recent studies has identified the delivery of real-time high resolution weather maps to the cockpit as an important future aeronautical application. Focusing on this application, we investigate the use of Lowand GeosynchronousEarth Orbit (...

The application of Ku-band VSAT Systems to single layer hexagonal micro strip patch antenna is thoroughly simulated in this paper. The radiating elements in this antenna are composed of two triangular and one rectangular slots from the conventional micro strip patch antenna. These slots are engraved in the rectangular and triangular patch, joined together in two structures, and by single probe ...

This paper describes an application of turbo codes in conjunction with 16QAM in high speed mobile satellite communications. The channel characteristics, the architecture of the modem and the performance curves for the selected turbo codes are presented.

This paper mainly focuses on the solving of joint link scheduling, which is a major aspect of resource allocation in a wireless satellite communication system. A brief review of some early definitive schedulers are presented and evaluated first, then the prevailing heuristic scheduler, alongside with the most up-to-date intelligent optimal schedulers are further introduced. Some problems which ...