Microwave Communication Research Papers - Academia.edu (original) (raw)

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- Computer Science, Microwave Communication, Computer Applications, VSWR
- by akaninyene obot
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- Computer Science, Microwave Communication, Computer Applications, VSWR
- by jonathon cheah
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- Computer Science, Microwave Communication, High Speed, Spectrum

... Cherniakov, M., Kubik, KKT and Nezlin, D. (2000) Radar sensors based on communication low earth orbiting satellites microwave emission. Proceedings IGARSS 2000, IEEE 2000 Int. ... The University of Queensland. Brisbane St Lucia, QLD... more

- by Mikhail Cherniakov
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- System Design, Microwave Communication, Radar Cross Section, Bistatic Radar

Fade depth prediction on airborne line-of-sight communication links is considered. There is no specific model for this scenario at the moment. The two ray multipath model, adapted to a realistic scenario of hilly or mountainous terrain, was used to account for flight and terrain geometry and for antenna parameters. Surprisingly, it was found that (i) in many practically important cases the fade depth depends on the path clearance angle only and (ii) the two-ray model predicts roughly the same fade depth dependence on the path clearance angle as the well-known Olsen-Segal model. This may be considered as a theoretical justification, to the best of our knowledge for the first time, of the path elevation angle factor in that model

- by Boniface Chomba
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- Atmospheric Modeling, Parameter estimation, Microwave Communication, Fading
- by Xiaodai Dong
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- Engineering, Technology, Microwave Communication, Fading

Microwave communication is still important to use in the backhaul network of telecommunications systems because it can reach remote areas that are difficult to reach by cable technology. One of the implementations is cross-ocean backhaul communication which is widely applied in the archipelago. So, to reach the remote areas, proper backhaul network planning is required. A point-to-point microwave transmission network can be a solution to reach remote areas of islands separated by oceans. The problem that occurs is that the multipath fading on the ocean route is quite large so that to overcome this we need a diversity technique. There are various diversity configurations such as space, frequency, and a combination of both or Hybrid. Based on the simulation and theoretical calculations, concluded that point-to-point configuration producing the quality of communication below the standards set by the ITU-R (ITU-T G.821). The use of space diversity and hybrid diversity provided a significant increase in the quality of communication both in terms of availability, unavailability, and fading margin.

- by alfin hikmaturokhman
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- Diversity, RF and Microwave Systems, Microwave Communication, PAthloss
- by Serioja Tatu
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- Analog Circuits, Noise, Hardware, Microwave Communication

This paper proposed new system architecture for Mobile Ad Hoc Networks (MANETs) on heterogeneous network to provide optimal Video on Demand (VoD) services to difference types of devices with optimal bandwidth utilization. And at the same time it will provide separate VoD services to different type of devices. and proposed a new conceptual model whereby a MANET node is possible to move through heterogeneous networks and infrastructures, there are also several nodes connected and receiving VOD services in different communication and infrastructural approach also we proposed for our system architecture Global Media Forwarder to provides wide area services through deployed infrastructures such as 3G and WIMAX as well as a new protocol call (DNDS) will be used for accumulating the required information from the MANET nodes and Media Forwarders for configuring and providing optimal services to the MANETs users, implemented and executed between Media Forwarders, CVSP and the MANETs nodes.

- by Stephan Steglich
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- Engineering, Computer Science, Taxonomy, ICT
- by Maria Stuchly
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- Microwave Communication, Human Interaction, Head, Telephony
- by Roberto Acosta
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- Engineering, Physics, System Design, Microwave Communication
- by Yue Wu
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- Fading Channel, Dispersion, Geometric model, Cultural Differences
- by R. Gilgenbach
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- Physics, Computational Modeling, Magnetic field, Geometry

The Recirculating Planar Magnetron (RPM) is a novel crossed-field device whose geometry is expected to reduce thermal load, enhance current yield as well as ease the geometric limitations in scaling to high RF frequencies as compared to... more

- by R. Gilgenbach
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- Physics, Microwave Communication, Radio Frequency, Magnetron

A phase conjugation based method for full-duplex digi-tal communications is discussed. The method uses a spa-tially confined and directive antenna pattern while a full-duplex digital communications link is maintained between moving platforms. The communications abilit ~ of the array is based on processing the phase associated with the mes-sage and the phase associated with the platform’s motion separately. Preliminary measurements at 6 GHz indicate that the phase conjugation method does allow simulators tracking and communications.

- by leo DiDomenico
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- Engineering, Signal Processing, Tracking, Microwave Communication

There has been a flourishing prospect of UWB technology in recent years in both communication and other purposes like microwave imaging and radar applications. Antenna in UWB imaging systems plays a significant role and it is quite challenging to design a proper antenna satisfying all the constraints required for microwave imaging applications. Recent studies of UWB antenna structures are specially

- by Domine Leenaerts
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- Modeling, Network Analysis, Analog Circuit Design, Oscillator

In this paper we present a digital beamforming scheme for wireless communication systems based on high altitude platforms. The proposed digital beamforming scheme, which is installed on the platforms in high-altitude-platform (HAP) systems, can reduce significantly the number of antenna elements and the corresponding receiver modules, analog to digital (A/D) converters etc. without loss of performance. As a result, the system complexity and the system costs can be reduced, therefore enhancing feasibility of HAP-based systems. Moreover, in the proposed scheme, it allows to specify narrow main beam width and low sidelobe level simultaneously. An illustrative example, which demonstrates the design of the new method, is included

- by Adam Ruxton
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- Underwater Communication, High Frequency, IEEE, Microwave Communication

Focusing on characterizing fully symmetric four-port devices using a two-port vector network analyzer (VNA), the authors formulate a new method of measurement in this paper. The device under test (DUT), is embedded in two probe pads and two auxiliary terminations for one to perform on-board measurement using two ground-signal-ground (GSG) probes and a two-port VNA. The DUT is a 30 GHz substrate integrated waveguide (SIW) Riblet short-slot hybrid with microstrip-to-waveguide transitions, and is fabricated on Rogers RO4003 reg substrate with 8 mil thickness. By taking advantage of the thru-reflection-line (TRL) calibration technique and the new method, the four-port scattering matrix (S-matrix) of DUT is reconstructed.

- by Yuhan Chen
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- Microwave Communication, S-parameters, Bandwidth, Vector Network Analyzer

In this work we present an accurate and cost-effective system for measuring S-band signal attenuation due to rainfall. The system is based on a pair of transmitter and receiver, operating at the lower limit of S-band, i.e. 2 GHz, separated at few meters distance and thus at any instant the rain's strength is uniform at this short path. The system is installed in two adjacent buildings inside University of Ioannina campus and at very close distance from the university's meteorological station. We present system's measurement modules as well as operating parameters. Finally, we present preliminary rain measurements for moderate, heavy, very heavy and extreme precipitation rates. Significant results, concerning correlation of the four precipitation rate cases with signal attenuation, are obtained.

- by Spyridon K Chronopoulos
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- Remote Sensing, Microwave Communication, Rain, Attenuation Measurement
- by Lakshmi Sutha Kumar
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- Microwave Communication, Frequency, Degradation, Polarization

Ultra-wideband (UWB) has potential applications in variety of medical areas such as implant wireless sensors, microwave hyperthermia, imaging and radar. The wave propagation inside human body must be known for an efficient system design... more

- by Ilangko Balasingham
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- Engineering, System Design, Human Body, Microwave Communication

Abstract An introduction to the use of real time data acquisition and analysis in meteorological applications is given, with examples of areas in which such techniques are becoming important. A detailed description is given of a readout system being constructed for a disdrometer (raindrop measuring gauge) using a VLSI neural network chip. Tests on simulated data give promising results down to droplet diameters of 0.05 mm, about a factor of 10 lower than what has been possible with previous methods

- by alvise sartori
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- Physics, Biomedical Engineering, Meteorology, Data Analysis

An introduction to the use of real time data acquisition and analysis in meteorological applications is given, with examples of areas in which such techniques are becoming important. A detailed description is given of a readout system being constructed for a disdrometer (raindrop measuring gauge) using a VLSI neural network chip. Tests on simulated data give promising results down to droplet diameters of 0.05 mm, about a factor of 10 lower than what has been possible with previous methods

- by alvise sartori
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- Physics, Biomedical Engineering, Meteorology, Data Analysis
- by Behnam Kamali
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- Engineering, Communication Technology, Air traffic control, Microwave Communication

... Misrod (13 km) Manideep (23 km) ... The mechanical properties of the reed set the frequency of operation, which is typically a few kilohertz. The high voltage trans-former sends current through the primary winding Lp of the high-Q RF... more

- by Madhukar Pitke
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- History, Telecommunications, Space Technology, Microwave Communication
- by mauro mongiardo
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- Finite Element Methods, Electrostatics, CAD, Microwave Communication
- by Jonathon Cheah
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- Microwave Communication, High Speed, Spectrum, Interference
- by Saad Asif
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- Distributed Computing, Packet Switching, Synchronization, Modulation
- by Cesar Amaya
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- Distributed Computing, Signal Processing, Turbulence, Electromagnetics
- by leo DiDomenico
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- Signal Processing, Tracking, Microwave Communication, Directional Antenna