microwave receiver emi solution - Auto-tune Filter

Auto-tune Filters

Auto-tune Filters are innovative RF filters that mitigate EMI interference with the utmost efficiency.

A superior alternative to limiters and filters, Metamagnetics’ Auto-tune Filters (AtFs) provide a broadband, fast-response, simple solution that protects receivers from electromagnetic interference (EMI) and ensures that signals-of-interest are detected.

These devices have a power threshold level which no one signal can exceed. If one or more signals exceeds the threshold, the Auto-tune Filter automatically limits it by attenuating the signal. Simultaneously, desired signals operating below the power threshold pass through the system unaltered.

 

Durable Autotune Filter

Durable

Auto-tune Filters are completely passive devices, requiring no electricity to perform their function. Containing no active elements, this device can survive the toughest environmental conditions in land, sea, air and space applications.
Adaptable Autotune Filter

Adaptable

Auto-tune Filters automatically adapt to mitigate interferers above a preset power level without attenuating desired below threshold signals at other frequencies.
Fast Autotune Filter

Fast

Auto-tune Filters require less than 50 nanoseconds to attenuate a high power signal to half its original power level.

Reflective Auto-tune Filter Specifications

Frequency
Range
(MHz)
Instantaneous
Bandwidth
(MHz)
Insertion
Loss
(dB)
Return
Loss
(dB)
P1dB Power
Threshold
(dBm)
Selectivity
(MHz)
Peak Power
(W)
Package
1400 to 2100 Full Band 2.5 12 -15 5 30 5mm QFN
960-1215 Full Band 3.0 12 -30 5 30 5mm QFN
1200 to 1400 Full Band 1.5 12 -15 5 30 5mm QFN
1400 to 1600 Full Band 1.5 12 -15 5 30 5mm QFN
1000 to 1200 Full Band 3.5 12 -23 5 30 10mm QFN
1300 to 2600 Full Band 5.0 12 -8 5 30 10mm QFN
Custom Designs
300 to 1000 200 6 12 -30 to -10 5 30 Coaxial
  450 8 10 -30 to -10 5 30 Coaxial
  Full Band 10 10 -30 to -10 5 30 Coaxial
1000 to 3000 300 2.0 12 -30 to -10 5 30 5mm QFN
  500 3 12 -30 to -10 5 30 Coaxial
  900 3 10 -30 to -10 5 30 Coaxial
  1300 5 10 -30 to -10 5 30 10mm QFN

 

Absorptive Auto-tune Filter Specifications

Frequency
Range
(GHz)
Instantaneous
Bandwidth
(MHz)
Insertion
Loss
(dB)
Return
Loss
(dB)
P1dB Power
Threshold
(dBm)
Selectivity
(MHz)
Peak Power
(W)
Package
2 to 4 Full Band 3.2 12 +5 25 200 0.5" x 0.5" x 2.5" SMA
4 to 8 Full Band 2.6 15 +12 25 200 0.5" x 0.5" x 2.5" SMA
8 to 12 Full Band 3.0 15 +18 25 200 0.5" x 0.5" x 2.5" SMA
9.1 to 9.8 Full Band 1.5 15 +10 25 200 0.5" x 0.5" x 1.5" SMA
9.1 to 9.8 Full Band 1.5 15 +32 25 200 0.5" x 0.5" x 1.5" SMA
9.1 to 9.8 Full Band 1.5 12 +10 Limiter Only up to 1 kW 1.25 x 0.65 x 3.5" SMA
12 to 18 Full Band 4.0 15 +23 25 200 0.5" x 0.5" x 2.5" SMA
Custom Designs
2 to 18 500 1.5 12 0 to +30 25 200 Coaxial
  1 1.5 12 0 to +30 25 200 Coaxial
  2 2 12 +5 to +30 25 200 Coaxial
  Full Band 4 12 +5 to +30 25 200 Coaxial

 

 

Video Demonstrates Real-time Impact of Interference on an Unprotected System vs. One Protected by an Auto-tune Filter (AtF)