Results 261 to 270 of about 27,446 (309)
Some of the next articles are maybe not open access.
Time and Frequency Transfer via Microwave Link
IEEE Transactions on Instrumentation and Measurement, 1970A two-way microwave link between the Naval Research Laboratory and the Naval Observatory has been established to transfer both time and frequency information with high accuracy. Time and frequency information are transmitted simultaneously by algebraically adding together a precision 1-MHz signal and 1 pps, thus providing continuous phase information ...
D.H. Phillips +2 more
openaire +1 more source
Remote Precipitation Monitoring Using a Microwave Link
2019 5th Experiment International Conference (exp.at'19), 2019Correct measurement of precipitation over a wide area is important for accurate predictions of flash floods or for water resource management. Today, the three main rainfall monitoring systems are rain gauges, weather radars and satellites. However, they all have limitations such as spatial resolution, mountain blockade and price, respectively.
Sofia I. Inácio +2 more
openaire +1 more source
50GHz Microwave Fiber Optic Links
2016 IEEE Radio and Wireless Symposium (RWS), 2016The integration and acceptance of microwave fiber optic solutions into an expanding set of system-level applications has generated a call for ever-increasing bandwidth. Recent infrastructure advances are pushing these requirements to Q-band and above for satellite communications, broadband sensors, and EW systems.
openaire +1 more source
A packaged hybrid doherty PA for microwave links
2016 46th European Microwave Conference (EuMC), 2016The performance of a 6.5 GHz hybrid GaN Doherty power amplifier is reported. The amplifier is packaged in a plastic overmold QFN 9×9 package and includes discrete GaN transistors and integrated passive GaAs splitting, matching and combiner networks. Measured results, under continuous wave operation, at 6.5 GHz shows 18 dB gain, a P1dB of 42 dBm, and 21%
D. Gustafsson +5 more
openaire +1 more source
Multipath angles-of-arrival on a terrestrial microwave link
IEEE Transactions on Communications, 1990Results are presented of experimental measurements of the angle of arrival and amplitude of the individual rays in a multipath microwave propagation situation. On the basis of extensive data collected on a 31.5-km path, statistical distributions that are expected to be of assistance in the design of diversity, especially angle-diversity, microwave ...
A. R. Webster, T. S. Merritt
openaire +1 more source
Optical Links for Microwave Application
1990Abstract : The RADC Directorate of Communications, Communications ECCM Section, in cooperation with the RADC Photonics Laboratory, Lightwave Signal Processing Group, is in the process of replacing the existing RF cabling system of their anechoic chamber with optical links.
Mark C. Schmitt +2 more
openaire +1 more source
Meteorology Using microwaves links: A comparative study
2009 6th International Symposium on Wireless Communication Systems, 2009Free-space losses between a system transmitter and a distant receiver of electromagnetic waves are the principal cause of signal loss. For frequencies higher than 10 GHz, losses due to the rain are the main additional cause of signal attenuation, after free space losses.
R. Ruiz Blazquez +2 more
openaire +1 more source
Microwave photonic link architectures
2011 IEEE Avionics, Fiber- Optics and Photonics Technology Conference, 2011Fiber optic links with a low noise figure and high spurious-free dynamic range (SFDR) at microwave frequencies are required for airborne antenna remoting applications. Compared to conventional electronic links operating over coaxial cable, fiber optic links can provide significant advantages in the areas of bandwidth, propagation loss, cable weight and
openaire +1 more source
High-performance microwave-photonic links
2008 IEEE Radio and Wireless Symposium, 2008Microwave links have become key components in many communications, defense, and scientific optical system applications. Therefore work continues to devise new link technologies and system concepts that maximize link performance. In this paper we review recent progress towards high spur-free dynamic range links, comparing the most attractive new ...
Thomas E. Darcie, null Jinye Zhang
openaire +1 more source
Advancements in survivable flexible microwave links
IEEE Military Communications Conference, 'Bridging the Gap. Interoperability, Survivability, Security', 2003The authors describe the developments and applications in fiber optics that significantly increase the overall system capabilities and survivability of microwave links for use in communication information transmission, and sensor system, including radar and electronic warfare systems.
I. Ury, L. Stark
openaire +1 more source