24/7 Space News
Accurate measurement of Permittivity advances radio telescope receivers
stock illustration only
Accurate measurement of Permittivity advances radio telescope receivers
by Staff Writers
Tokyo, Japan (SPX) Aug 08, 2023

Researchers invented a novel method to measure the permittivity of insulators 100 times more accurately than before. This technology is expected to contribute to the efficient development of sensitive radio receivers for radio telescopes as well as to the development of devices for the next generation communication networks, "Beyond 5G/6G."

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.

Research Report:Accurate Free-Space Measurement of Complex Permittivity With the Angular Spectrum Method

Related Links
National Astronomical Observatory of Japan
Stellar Chemistry, The Universe And All Within It

Subscribe Free To Our Daily Newsletters

The following news reports may link to other Space Media Network websites.
Webb Telescope unmasks Ring Nebula's cosmic dance
Manchester UK (SPX) Aug 04, 2023
NASA's James Webb Space Telescope (JWST) has released exquisite new visuals of the famed Ring Nebula, or Messier 57, to the world. The unveiling was done by a global consortium of astronomers, a team steered by Professor Mike Barlow of UCL, UK, Dr Nick Cox of ACRI-ST, France, and with contributions from Professor Albert Zijlstra of The University of Manchester. The Ring Nebula, a luminous beauty in the Lyra constellation, is no stranger to stargazers. Visible throughout the summer months, even a s ... read more

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

The content herein, unless otherwise known to be public domain, are Copyright 1995-2024 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. General Data Protection Regulation (GDPR) Statement Our advertisers use various cookies and the like to deliver the best ad banner available at one time. All network advertising suppliers have GDPR policies (Legitimate Interest) that conform with EU regulations for data collection. By using our websites you consent to cookie based advertising. If you do not agree with this then you must stop using the websites from May 25, 2018. Privacy Statement. Additional information can be found here at About Us.