B - Operations – Transporting – 03 – B
Patent
B - Operations, Transporting
03
B
327/1, 327/21
B03B 1/02 (2006.01) E21B 36/04 (2006.01) E21B 43/24 (2006.01) H05B 6/08 (2006.01) H05B 6/10 (2006.01) H05B 6/80 (2006.01)
Patent
CA 1183909
RF APPLICATOR FOR IN SITU HEATING Abstract of the Invention A coaxially fed applicator for in situ RF heating of sub- surface bodies with a coaxial choke structure for reducing outer conductor RF currents adjacent the radiator. The outer conductor of the coaxial transmission line supplying RF energy to the radiator terminates in a coaxial structure comprising a section of coaxial line extending toward the RF radiator from the termi- nation for a distance approaching a quarter wavelength at the RF frequency and a coaxial stub extending back along the coaxial line outer conductor from the termination for a distance less than a quarter wavelength at said frequency. The central con- ductor of the coaxial transmission line is connected to an enlarged coaxial structure approximately a quarter of a wave- length long in a region beyond the end of the outer conductor coaxial choking structure.
376811
Raytheon Company
Smart & Biggar
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