Design narrow-band compact filters, based on high-quality waveguide-dielectric resonators with anisotropic materials is the subject of this paper. Filter represents a segment rectangular waveguide rotated around longitudinal axis 90 degrees and containing one or more dielectric inserts that completely fill resonator along narrow wall partially wide one. A distinctive feature proposed filter hig...

Satellite communication offers the prospect of service continuity over uncovered and under-covered areas, ubiquity, scalability. However, several challenges must first be addressed to realize these benefits, as resource management, network control, security, spectrum energy usage satellite networks are more challenging than that terrestrial networks. Meanwhile, artificial intelligence (AI), inc...

The next generation global communication network infrastructure is designed to be all IP based supporting various heterogeneous core and access technologies for broadband and mobile user applications. In this paper, we discuss the trends of broadband satellite communication networks to meet the emerging aeronautical and fast train applications, and mobile users in providing ubiquitous global co...

Satellite communications and relaying techniques have been receiving the attention of the research community over the last years. This paper proposes a terrestrial to satellite communication system aided by terrestrial relay nodes to facilitate a robust, reliable, and efficient communication link and improve the spectral efficiency. In particular, this paper concentrates on evaluating the spect...

We investigate reliable multicast communication over satellite networks. We compare a scenario where receivers can use a feedback channel to signal loss to a scenario where no feedback channel is available. We show that the introduction of a feedback channel is the key to allow for bandwidth-eecient, robust, and fully reliable multicast communication via satellite.

Satellite communications (SatComs) recently, have admitted as a new technological advances that attracted and raised special investment ventures. Space communication technology has found many application areas from costly, one-of-a-sort structures, to utilize again of on sequential tasks, the progress canonical protocols accepted by space agencies lots countries. one important technologies for ...

The CDMA system has been used extensively in satellite communications. This is due to advantages of spread spectrum techniques used in CDMA systems, and their higher capacity in compare to FDMA & TDMA systems [1]. However, since the advantage of CDMA is related to interference level, CDMA systems needs to have perfect power control for minimizing the interference and obtaining required qualitie...