Two generations of ultra-low-loss IR-blocking filters.
1st generation
The first HERD filter. Non-magnetic, with the leaky-waveguide structure that drains high-frequency radiation into an absorber while microwave signals pass undisturbed.
2nd generation
Non-magnetic like HERD-1, and inline in SMA wiring: the absorber is built into the package, the cross-section is 68% smaller, and the stopband is deeper, measured to 145 GHz.
Both generations work the same way. The changes below are what a HERD‑1 user gains by moving to HERD‑2.
68%
smaller cross-section
9.53 × 9.53 mm. Fits inline in SMA wiring and inside the sample can, and can mount to a bracket if wanted.
Built in
absorber in the body
The apertures end in absorber inside the housing. HERD‑1 wears its absorber on the outside.
+10 dB
more attenuation
More than 60 dB from 70 GHz, measured to 145 GHz. HERD‑1: more than 50 dB from 60 GHz.
Copper
gold-plated housing
Thermalizes well through its connectors, and through the mounting holes if needed. HERD‑1 uses aluminium as its main body.
Pricing and lead times for your cryostat.
Or email sales@swedenquantum.com