Accession Number : ADD013275

Title :   Waveguide Coupler Using Three or More Wave Modes.

Descriptive Note : Patent, Filed 27 Apr 81, patented 26 May 87,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Barnett, Larry R ; Baird, J M

Report Date : 26 May 1987

Pagination or Media Count : 10

Abstract : A coupler employing two similar sections of waveguide which extend colinearly in longitudinal succession. Adjacent ends of the guide sections are spaced apart to form a gap in the boundary of the sections. A third section of waveguide is disposed external to and coaxial with at least a part of each of the two waveguide sections to provide a boundary surrounding the gap. Electromagnetic energy propagating down one of the two similar sections of waveguide in a first mode and entering the gap is converted energy is reconverted to the first mode upon reaching the other of the two similar sections of waveguide. The electric field pattern exciting the section of waveguide at the end of the gap and propagating down it is exclusively in the first mode. The cutoff-determining dimensions of the third section of waveguide and the gap separation are determined from the condition that the phase relationships between the modes at the end of the gap be the same, to within an integral multiple of 2 pi, as what they were at the beginning of the gap, to insure complete transfer of power between the two similiar sections of waveguide. (Patent).

Descriptors :   *PATENTS, *WAVEGUIDE COUPLERS, *WAVEGUIDES, ELECTRIC FIELDS, COUPLING(INTERACTION), LONGITUDE, CONVERSION, PATTERNS, ENERGY

Subject Categories : Electrical and Electronic Equipment
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE