Permittivity is a value that indicates how electrons inside an insulator react when a voltage is applied to the insulator. It is an important parameter for understanding the behavior of radio waves as they travel through insulators. In the development of telecommunications equipment, it is necessary to accurately determine the permittivity of materials used for circuit boards and building columns and walls. For radio astronomy, researchers also need to know the permittivity of components used in radio receivers.
By devising a calculation method for electromagnetic wave propagation, the research team developed an analytical algorithm that derives the permittivity directly rather than by approximation. The team, consisting of researchers and engineers from the National Astronomical Observatory of Japan (NAOJ) and the National Institute of Information and Communications Technology (NICT), then used the new method to measure lens material for a receiver being developed for the Atacama Large Millimeter/submillimeter Array (ALMA) and confirmed that the results were consistent with other methods, demonstrating its effectiveness in actual device development.
"The newly developed method is expected to contribute to not only the design of radio telescope components, but also to the development of high-frequency materials and devices for the realization of next-generation communication networks (Beyond 5G/6G) using the millimeter wave/terahertz band," says Ryo Sakai, an engineer at NAOJ and the lead author of the research paper published recently.
Reducing the error due to approximation by a factor of 100 speeds up the development process. If the permittivity of individual materials is measured inaccurately, the actual fabricated product may not meet the target performance. If the permittivity is known accurately from the design stage, unnecessary trial and error can be reduced and costs can be cut.
Conventionally, there are several methods used for measuring permittivity. One method that can accurately measure permittivity is the "resonance method," but in that case, the material to be measured must be placed in a device called a resonator, which requires precision processing of the material, sometimes less than several hundred micrometers thick. Another drawback is that the permittivity can only be measured at several specific frequencies.
Since it is necessary to measure the permittivity of various materials during the development stage of a device, if high-precision processing is required for each measurement, the development process will take a long time. On the other hand, the "free-space method," which has fewer of these drawbacks, is also used, but in this case, an approximation has been used to analyze the measurement results, and the error caused by this makes accurate measurement difficult.
"Compared to other measurement methods, the free-space method has fewer restrictions on the shape of the measurement sample, and it is easy to extend the measurement frequency band," says Sakai. The new analysis method is used with the "free-space method," which means that with the new method, we can accurately measure permittivity with fewer constraints.
NAOJ and NICT have jointly been conducting research and development for high-precision material property measurement systems at millimeter-wave and terahertz-wave frequencies. The team is aiming for further technological innovation by combining the knowledge gained through the development of astronomical instruments with that gained from developing communication technology.
|Subscribe Free To Our Daily Newsletters|
NASA and Axiom Space join forces for fourth private mission in 2024
Russian cosmonauts perform spacewalk to attach debris shields to space station
NASA back in touch with Voyager 2 after 'interstellar shout'
Advanced Space selected for two NASA SBIR Phase I Awards
Impulse Space secures $45M in Series A Funding Round
Boeing says troubled Starliner will be ready to fly crew by March
Hypersonics Capability Center: Northrop Grumman's next step beyond Mach 5
SpaceX launches 22 additional Starlink satellites
Organic molecules in Martian crater help to reconstruct planet's history
InSight study finds Mars is spinning faster
Ingenuity flies again after unscheduled landing
A frosty anniversary weekend for Curiosity: Sols 3909-3911
China to launch "Innovation X Scientific Flight" program, applications open worldwide
Scientists reveal blueprint of China's lunar water-ice probe mission
Shenzhou 15 crew share memorable moments from Tiangong Station mission
China's Space Station Opens Doors to Global Scientific Community
Eutelsat and Thaicom to partner for new software-defined satellite over Asia|
Astra Space optimizes workforce to support sustainable long-term business plan
AVS leverages optimum coverage of EUTELSAT 65 West A satellite over Brazil
US storms, natural disasters push up insurance costs: Swiss Re
Deep Space communications to get a laser boost
Solestial's Tech to Power Atomos's OTVs
Recycling parts for life on the Moon
UTokyo unfolds the 'Future Window' dream
Chemical contamination on International Space Station is out of this world
New exoplanet discovery builds better understanding of planet formation
Violent Atmosphere Gives Rare Look at Early Planetary Life
Using cosmic weather to study which worlds could support life
Looking for Light with New Horizons
James Webb Space Telescope sees Jupiter moons in a new light
NASA's Juno Is Getting Ever Closer to Jupiter's Moon Io
SwRI team identifies giant swirling waves at the edge of Jupiter's magnetosphere
|Subscribe Free To Our Daily Newsletters|