List of Articles directional antenna

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  1 - Fuzzy Clustering Algorithm to Identify Sybil Attacks in Vehicular ad Hoc Networks
  Mahdi Maleknasab Ardekani Mohammad Tabarzad Mohammad Amin Shayegan
  10.22094/jcr.2023.1979689.1295
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  2 - Radio Band Utilization Improvement in Wireless Mesh Networks for Multicast Routing
  Zeinab Asgari Avid Avokh Mahmood Daneshvar Farzanegan
  This paper addresses the cross-layer design for multicast routing in Multi-Radio Multi-Channel Wireless Mesh Networks (MRMC-WMNs) with directional antennas. WMNs have a limited capacity because of existence of interference between the wireless links. This issue becomes More

  This paper addresses the cross-layer design for multicast routing in Multi-Radio Multi-Channel Wireless Mesh Networks (MRMC-WMNs) with directional antennas. WMNs have a limited capacity because of existence of interference between the wireless links. This issue becomes more crucial in the multicast communications. Directional antennas can focus the transmission power to the limited sector. Thus, equipping the wireless nodes with these antennas leads to degrade interference. This paper proposes two cross-layer algorithms named “Directional Multicast Tree Construction (DMTC)” and the “Directional Interference-aware Multicast Tree Construction (DIMTC)” to solve the aforementioned problems. In the first algorithm, we jointly consider the channel diversity; the wireless broadcast advantage and the directional antenna technology to reduce number of transmissions in the routing trees. In the second one, in addition to above factors we use interference aware path selection factor to eliminate the interference among the multicast sessions. This scheme is aiming at improving the utilization of radio resources reducing both number of transmissions and interference, at the same time. Simulation results demonstrate that our schemes are more efficient than other existing schemes as well. Manuscript profile
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  3 - Design and Simulation of a Sample of Integrated Broadband Antenna and Omni-Directional for Marine Floats
  Maisam Vaheb Ali Hashemi Hossein Emami Mahdi Emami
  Nowadays one of the specialized and important issues in construction of marine floats is to design the communication telecom system between them. Always this issue has been posed how to establish an appropriate communication for floats in different distances and differe More

  Nowadays one of the specialized and important issues in construction of marine floats is to design the communication telecom system between them. Always this issue has been posed how to establish an appropriate communication for floats in different distances and different weather conditions in the sea. Due to the restrictions, such as equipment size, weight bearing on the floats has always existed.One of the main parts of telecom communication system is antenna.The main problem, use antennas and Towers various in floats, As required, waves with different wavelength sand different routes to be published. If the antenna can be designed with small dimensions and possible,wide frequency range and also covered omni-directions, the problem has been mentioned above somewhat is resolved. The purpose of this paper is to design and simulate of a sample of integration broadband antenna and omni-directional, that resolve About restrictions above and Integration of two antennas in frequency range of VHF/UHF=150-450MHZ and HF=3-30MHZ with characteristics of 50ohm input impedance, linear vertical polarization, VSWR<2.5, antenna gain ranges between (-12)dBi to (4.8)dBi, the maximum antenna diameter of 18cm, and the maximum height of opened antenna of 538.2cm. Manuscript profile