Simple Ham Radio Antennas

Many antennas, multiple benefits : " Many antennas , multiple benefits", Jan 21, 2015 By combining large distributions of compact antenna nodes with fast fiber optic communication, researchers have developed a new wireless infrastructure ready for intense future demands. Credit: A* A*STAR Institute for Infocomm Research A concept that balances large-scale installations of low-cost and low-power antennas to boost cellular coverage in difficult environments will also provide better connectivity to more users. Developed by A*STAR, this new architecture for wireless communications can help service providers meet growing demands for increased network capacity and improved energy efficiency. Jingon Joung, Yeow Chia and Sumei Sun from the A*STAR Institute for Infocomm Research in Singapore sought to combine two state-of-the-art wireless technologies into a novel type of antenna system. The first technology, known as large-scale multiple-input multiple-output (L- MIMO ), use...

Those of you who follow my Amateur Radio News Blog (http://kh6jrm.com) on a regular basis may be aware of two related radio stories that will have a significant impact on the future of amateur radio and the rf spectrum that we share with other services. The first article relates to comments made by FCC Chairman Tom Wheeler at the annual NAB convention today in Las Vegas, Nevada. In his speech before NAB delegates, Wheeler urged television broadcasters to abandon over-the-air transmissions in favor of streaming over the internet.  Wheeler says the migration to broadband internet would free up spectrum for the ever increasing demands of consumer electronics, from cell phones and iPads to mobile radio and other public services.  Already, VHF analog channels between channels 2 and 13 have moved to higher frequencies and now employ digital signals.  The now vacant channels won't remain idle for long, since these VHF allocations will be assigned to other services. The gra...