Band-Stop Field Filters

Anteral Band-Stop Field Filters

FREQUENCY SELECTIVE SURFACE (FSS)

  • Low transmittance (< 5%) in stop bands
  • High transmittance (60-90%) in pass bands
  • Custom band stop in the frequency range from 75 GHz to 500 GHz
  • Very wide fractional bandwidth up to 70%
  • Ultra-low loss flexible and low dielectric constant substrate material


Description: 

Anteral’s Band-Stop THz Field Filters consists in a Cr-Cu-Au frequency selective surface that blocks THz radiation in a determined frequency band. The micro grid array is patterned via photolithography process on a very thin (100 µm) and ultra-low loss substrate for THz frequencies with low dielectric constant. The filters are polarization independent and are fabricated in single or double layer according to the desired performance. Anteral offers custom designs in the frequency range between 75 GHz and 500 GHz.

Performance:

            Fabrication Results

                  Single Layer

                  Double Layer

 














Aplications: 

The Field Filters can be used in MmW and THz systems for filtering signal in transmission or reception. They are suitable for radio-communication, astronomy, material research or imaging applications.

One of the most cutting-edge applications of Anteral’s THz Filed Filters is biological and chemical sensing. Since the filters provide sharp peaks with high rejection at the resonant frequency, they can be used as sensing or detecting devices. By placing the element to be sensed on the surface, a redshift in the resonant frequency occurs which allows identifying the element. Anteral offers specific designs with superior sensitivity for sensing applications.

Further information available in the datasheets.

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