Carlson antenna a big gain for white spaces
Carlson announced a new antenna specifically designed to support the use of white-space spectrum.
The issue addressed by the new antenna is that radios used in white space transmission must interact dynamically with spectrum databases to determine available channels to use. That requires an antenna that can meet performance requirements at any point in the white space band – the areas of unused spectrum in the TV bands located between 470 MHz and 698 MHz in the UHF range.
Carlson said its design breakthrough provides strong, consistent gain across the entire UHF band – not limited to specific channels or geographic areas.
“Somebody using channel 14 will see the same throughput as someone using channel 51, with virtually no difference in quality of signal,” said Rick Gustafson, Carlson’s antenna and enclosure production engineer. “
This consistency is particularly important among critical communications users such as public safety, government and utilities, not to mention the hundreds of wireless Internet service providers (WISPs) who deliver broadband to millions of customers, the company noted.
“We tried several different concepts, and this one allowed us to get an additional gain over a dipole without compromising bandwidth or coverage,” noted Jim Carlson, CEO and chief engineer. “Consistent performance across the band is a critical factor with frequency-agile radios, and the new design provides omnidirectional performance with 6 dBi gain across the TVWS spectrum.”
The antenna is constructed of stainless steel and aluminum alloy and enclosed in PVC. The four-foot-by-six-inch cylindrical enclosure design provides for minimal wind loading and ice formation, easy shipping and handling and an aesthetically pleasing appearance.