Best Substrate for VHF applications

AI Thread Summary
For very high frequency antenna applications, high-resistivity silicon and sapphire are recommended as the best substrate materials due to their low loss characteristics at THz and optical bands. Other substrates may also be suitable, but silicon and sapphire are the most commonly used. Researching papers on THz detectors, particularly those involving integrated detectors in log-periodic antennas, can provide further insights. The choice of substrate ultimately depends on specific application details. Selecting the right substrate is crucial for optimizing performance in VHF applications.
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Hi buddies,
i am working on very high frequencies antenna applications. can anybody updates me about best suitable substrate material which exhibits low losses at THz and optical band. i appreciate that.
 
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It will depends on the details. From what I remember you should probably look at high-resistivity silicon or sapphire.
There are also quite a few other substrates that should work, but I believe Si and sapphire are the most common ones.

Have a look at some papers on THz detectors (especially experiments with e.g. detectors integrated in log-periodic antennas).
 
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