CTT filters offer low in-band loss and extremely high out-of-band blocking over a wide frequency range.
Out-of-band rejection is predominantly by reflection to ensure minimal thermal loading of cryogenic platforms.
We offer a bespoke design consultancy service for single devices and multi-element filtering schemes.
State of the art astronomy demands high performance detectors, good enough to measure the change in power that would result if we could strike a match on the surface of the Sun!
To achieve the desired level of sensitivity, detectors are typically cooled to sub-Kelvin temperatures (below -272 C) and exposure must be limited only to the precisely required range of frequencies.
High performance filters are therefore critical. They must transmit the tiny in-band signal power efficiently to the detectors. At the same time they must block out unwanted power to a very high level.
The plot shows the spectral blocking specification for filters on board the HFI instrument on ESA's Planck satellite. You can see that our filters actually achieved rather more than was specified, which meant that the lifetime of the Planck mission was extended by 14 months.
“In March 2014 the European Space Agency confirmed a standard theory in modern cosmology known as inflation. Congratulations to them - and to the human race.“
Wall Street Journal
Leader Comment – Sunday Nov 14th 2014
ALMA. The Atacama Large Millimetre Array.
A network of 64 telescopes sited at 5500m above sea level in the Andes mountains.
A Cardiff University physicist has been awarded the 2024 Institute of Physics (IOP) James Joule Medal and Prize.
Now entering its 50th year, the 2025 edition will take place from 17–22 August in Espoo, Finland, hosted by Aalto University.
Two of CTT’s founders are co-authors of a definitive guide to astronomical instrumentation and techniques.
At Celtic Terahertz Technology, our work sits at the cutting edge of terahertz science and innovation.
