Patent ID: 9574929
Date: 2017-02-21
CPC Classifications: G01F,G01S,H01P

Claim:
1. A coupling device for impedance matching a guided wave radar (GWR) system, comprising: a feed-through to a tank having an outer metal sleeve on a dielectric on an inner conductor, said feed-through for connecting to a coaxial cable or other transmission line connector that includes an inner conductor that connects to an output of a transceiver and an outer conductor that connects to said outer metal sleeve; a subwavelength coaxial transmission line (CTL) coupled to said feed-through including an inner conductor connected to said inner conductor of said feed-through and an outer conductor connected to said outer metal sleeve, and includes a dielectric between its said inner and said outer conductor; and a mode converter (MC) having a plurality of metal fingers of length 2λ± twenty percent connected to said outer conductor of said subwavelength CTL, said MC including a dielectric coating on its inner conductor connected to said inner conductor of said subwavelength CTL.