However, there are increasing needs for dual-band high-gain antennas
with relatively larger frequency ratio in the area of remote wireless communication.
"With a functioning high-gain antenna
, this wouldn't have been so important," says O'Neil, "but if we were starting over, anticipating the antenna problem, we'd have picked a different date, even [considering] all the benefits of the December 7th arrival."
He notes, however, that astronomers will have to plan observations with Galileo carefully, since its crippled high-gain antenna
will make it difficult to send images.
Just this week, researchers from NASA's Jet Propulsion Laboratory in Pasadena, California, the Johns Hopkins University Applied Physics Laboratory in Laurel, Maryland, and Langley have begun testing the Clipper's high-gain antenna
(HGA), according to a (https://www.jpl.nasa.gov/news/news.php?feature=7362) statement.
According to the firm, the set of extended range communication solutions includes transmitters with a power of up to 300W, mast-head amplifiers and high-gain antenna
Choi, "Wideband high-gain antenna
using metamaterial superstrate with the zero refractive index," Microwave and Optical Technology Letters, Vol.
Last week, the researchers checked whether moving the rover's high-gain antenna
could trigger problems, but routine communication via that dish antenna resumed on April 20.
The 2.4 GHz high-gain antenna
is rugged and weatherproof, using UV-resistant ABS plastic construction, and is designed for wireless LAN applications.
The 900 MHz 9XTend-NEMA incorporates 9XTend RF modem technology, which features a wireless module operating at 1 Watt of output power, for ranges up to 40 miles line-of-sight with a high-gain antenna
. The 9XTend also utilizes 256-bit AES encryption and sophisticated interference immunity, ensuring secure and reliable communication.
A high-gain antenna
aimed directly at the sun will have a large antenna temperature.
Keeping the device on duty longer would have required unfurling Galileo's umbrella-like high-gain antenna
, a risky venture so close to the sun's heat.
The satellite took the shot using its fisheye camera and beamed it back to Earth after the ground-control team properly unfolded its high-gain antenna
on May 9.