Antennas and propagation
to increase the capacity of a wireless link using multiple transmit and receive antennas to take advantage of multipath propagation.
... (four antennas), using multiple-input multiple-output ...receive antennas to take advantage of multipath ...multiple antennas, the best subset to obtain the highest quality and reliability of the ...
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Counter Measures for Null Direction Propagation of Antennas in Tactical High Frequency Sky Wave Communication
... The study of null direction radiation pattern of rod antenna helped in understanding the phenomenon of null direction propagation of HF radiations using sky wave mode. The fabrication and trials of the block made ...
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US Navy Training Course Electronics Technician Volume 07 Antennas and Wave Propagation pdf
... 7, Antennas and Wave Propagation, is an introduction to wave propagation, as it pertains to Electronics Technicians, and shipboard and shore-based ...
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Measurement of the Influence of Antennas on Radio Signal Propagation in Underground Mines and Tunnels
... signal propagation in underground mines and tunnels has been studied for decades [1–10], most of the prior studies assume omnidirectional antennas for both the transmitter and the receiver, and the influence ...
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Reconfigurable antennas and radio wave propagation at millimeter-wave frequencies
... wave propagation peculiarities at mm-wave frequencies in indoor and outdoor environments to be able to deploy wireless networks ...The propagation part of the thesis focuses on several ...realistic ...
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Cisco Aironet Antennas and Accessories
... After mobility issues are resolved, the physical environment must be examined. While the area of coverage is the most important factor for antenna selection, it is not the sole decision criterion. Building construction, ...
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On the System Modeling of Antennas
... including antennas is modeled as a two-port network and characterized using the network theory based on S-parameters, Z-parameters, Y -parameters, h-parameters or ...space propagation (i.e., ideal ...
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Implantable antennas for biomedical applications
... implantable antennas were designed and evaluated to obtain this function at a distance of over 2 meters [3, ...radio propagation channels and the resulted parameters demonstrated the importance of digital ...
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Reconfigurable Antennas: A Survey
... for modeling general input-output relationships. The distinguished characteristics of NNs such as learning from data, to generalize patterns in data and to model nonlinear relationships, makes them a good candidate to ...
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Reconfigurable Antennas and Their Applications
... Radiation pattern is one of the most important characteristics of antennas. It is a graphical representation of antenna’s far-field radiation properties. It also describes the ability of an antenna to ...
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Implantable antennas for biomedical applications
... field propagation in lossy matter, telecommunication and package engineering [7, 8], material and biological science [9], and security and privacy matters ...
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On the Duality between MIMO Systems with Distributed Antennas and MIMO Systems with Colocated Antennas
... distributed antennas and MIMO systems with colocated antennas behave in a very similar fashion will also hold, when more general scenarios are con- ...distributed antennas come into play, distributed ...
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Geometrically Based Channel Model for Indoor Radio Propagation with Directional Antennas
... of antennas in a multipath environment cannot be accurately evaluated by using antenna directive gain only, since the non-isotropic angular response of the environment exists ...
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Space Time Frequency Characterization of 3D Nonisotropic MIMO Multicarrier Propagation Channels Employing Directional Antennas
... wave propagation in the third-dimension is definitely important; especially when the communication system efficiently exploits potentials of multiple ...multicarrier propagation channels in a ...
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Nonlinear characterisation of reconfigurable antennas
... Enormous possibilities offered by modern signal processing have enlightened the software radio concept. From hardware point of view, SDR can be described as a system in which the majority of the functionality is defined ...
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Introduction to Ultra-Wideband Antennas
... directional antennas concentrate energy into a narrower solid angle than an omni-directional ...reflector antennas may have gains of +10 dBi, +20 dBi, or even more (see Figure ...
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Filtering Antennas: Synthesis and Design
... In this paper, detailed synthesis and design of both the antenna is discussed. Type 1 Filtering Antenna is third order 2.45GHz Chebhyshev Bandpass Filtering Antenna in which the printed inverted-L antenna act as a last ...
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RFI Prevention for Colocated Antennas
... The antenna gain in an off-boresight direction, or depends on the antenna radiation pattern and the pointing angle. The radiation pattern of a antenna measured in S-band at range is given in Fig. 3. At present, this is ...
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UWB antennas for wireless communications
... Various wideband antennas have been interesting subjects and have found important applications in military and civilian systems. The PMA has been a good candidate for such applications. There has been a question ...
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Multiband Fractal-Like Antennas
... Immense growth in wireless communication system demands more complex and sophisticated systems along with more operating bands. In mobile communication systems many different frequency bands are needed such as global ...
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