antenna length vs. dielectric constant?

<rp0000003356 · 2005-03-10T20:51:03+00:00

Most antenna length formulas assume the antenna will be operating in eitherair or a vacuum where the dielectric constant of "space" is equal to 1.What happens to the length of a half-wave dipole when it is operated in aspace with a dielectric constant of 80?Since the end-to-end capacitance increases with an increased dielectric constantfor the medium surrounding an antenna, I'm guessing that an antenna designedfor operation in air must be shortened to reduce both its incuctance andend-to-end capacitance to regain the resonance it used to have in air. Ijust don't know *how much* shorter.Can somebody "do the math" for me?Jim----== Posted via - Unlimited-Uncensored-Secure Usenet News==---- The #1 Newsgroup Service in the World! >100,000Newsgroups---= 19 East/West-Coast Specialized Servers - Total Privacy via Encryption =---

Mar 10, 2005 20 Replies

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Marc H.Popek 21 years ago

here is a web site, for a group that has just obtained a patent that optimizes the dielectric shrink, surface scattering and wave front focusing, as you describe.

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