Title :
Bidirectionality of Reciprocal, Lossy or Lossless, Uniform or Periodic Waveguides
Author :
Yaghjian, Arthur D.
Author_Institution :
Air Force Res. Lab./Sensors Directorate, Hanscom
fDate :
7/1/2007 12:00:00 AM
Abstract :
Using the scattering-matrix equations for two antennas placed in the fields of a waveguide, it is proven that all reciprocal, lossy or lossless, uniform or periodic waveguides are bidirectional. Since Maxwell\´s equations imply directly that propagation constants on a lossless reciprocal waveguide come in pairs (beta,-beta*), "complex waves" on a lossless reciprocal, uniform or periodic waveguide come in quadruplets with propagation constants (beta,-beta, beta*,-beta*).
Keywords :
Maxwell equations; directive antennas; matrix algebra; waveguide antennas; waveguide theory; Maxwell equation; antenna; bidirectional waveguide; lossless waveguide; lossy waveguide; periodic waveguide; reciprocal waveguide; scattering-matrix equation; uniform waveguide; Antennas and propagation; Distributed parameter circuits; Equivalent circuits; Force sensors; Magnetic materials; Maxwell equations; Power transmission lines; Propagation constant; Propagation losses; Scattering; Propagation constants; waveguide;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2007.899294
