An adjustable filter that can prevent interference in the range 600 MHz to 6 GHz

Not quite: &quot;As a result, the new filter can be tuned to any frequency between 3.4 GHz and 11.1 GHz...&quot;<p>The 600 MHz to 6 GHz referred to currently used communication frequencies.

The main innovation here seems to be the elimination of a bias electromagnet that consumes a constant current to generate a desired amount of magnetic flux.<p>These apparently can consume 250 milliamp, if my quick Google is right.<p>Here&#x27;s a paper[1] that might be how they are doing it.<p>[1] <a href="https:&#x2F;&#x2F;ieeexplore.ieee.org&#x2F;document&#x2F;7529113" rel="nofollow">https:&#x2F;&#x2F;ieeexplore.ieee.org&#x2F;document&#x2F;7529113</a>

This kind of work sounds potentially (?) important for continuing to improve network technology. Unfortunately I don&#x27;t have the background to understand why it works in the slightest.<p>However, it reminded me of an older approach to signal filtering that I just recently learned about: the superheterodyne radio receiver. It&#x27;s a simple idea that enabled us to build cheap, tunable radios. YouTube video if you&#x27;re curious: <a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=hz_mMLhUinw" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=hz_mMLhUinw</a>. Definitely an accessible introduction to a neat trick in signal processing!

I wonder if you could use this to overcome electronic warfare jamming of gps.

It might be cool, but I wasn’t able to find price comparison to existing technologies. The modules containing dozens of specified filters are dirt cheap. Since band frequencies for 5G are known no fine tuning needed. Also no fab wants exotic materials and a new process.