862646-A is referenced by 17 patents.

862,646. Aerials; R.F. couplings. ZEISS JENA, C., VEB. March 22, 1957, No. 9558/57. Class 40(7) [Also in Group VI] A therapeutic micro-wave radiator arranged for the irradiation of tissue 6 and having its radiation beam directed to a focus at a point 5 therein comprises a waveguide 9 with a partspherical bounding surface 3 formed by one face of a convex lens filling the space between waveguide and tissue. As described the lens is formed by a spherical cup 4 of ceramic material and a plastic or elastic body 7 of high dielectric constant filling the space between the cup and the tissue to be treated. The body 7 may be a bladder filled with water. The cup 4 acts as a quarter-wave matching layer; if required its thickness may be modified to assist in obtaining uniform intensity over the micro-wave front in the tissue.; The waveguide 9 is matched to an air-filled co-axial cable feeder 2 by means of adjustable slides 10 and 11 arranged in extensions of the cable and guide respectively as shown.

Title
Improvements in therapeutic micro-wave systems
Application Number
GB19570009558 19570322
Publication Number
862646 (A)
Application Date
March 22, 1957
Publication Date
March 15, 1961
Inventor
Wrede Wolfgang
Assignee
Zeiss Jena Veb Carl
IPC
A61N 05/02
A61N 05/04
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