Title :
Dyadic analysis of partially coherent submillimeter-wave antenna systems
Author :
Withington, Stafford ; Yassin, Ghassan ; Murphy, J. Anthony
Author_Institution :
Cavendish Lab., Cambridge Univ., UK
fDate :
8/1/2001 12:00:00 AM
Abstract :
We describe a procedure for simulating the behavior of partially coherent submillimeter-wave antenna systems. The procedure is based on the principle that the second-order statistical properties of any partially coherent vector field can be decomposed into a sum of fully coherent, but completely uncorrelated, natural modes. Any of the standard electromagnetic analysis techniques-physical optics, geometrical theory of diffraction, etc.-can be used to propagate and scatter the modes individually, and the statistical properties of the total transformed field reconstructed at the output surface by means of superposition. In the case of modal optics-plane waves, Gaussian optics, waveguide mode matching, etc.-the properties of the field can be traced directly by means of scattering matrices. The overall procedure is of considerable value for calculating the behavior of astronomical instruments comprising planar and waveguide multimode bolometers, submillimeter-wave optical components, and large reflecting antennas
Keywords :
S-matrix theory; astronomical instruments; bolometers; electromagnetic wave diffraction; electromagnetic wave propagation; electromagnetic wave scattering; geometrical theory of diffraction; mode matching; optical elements; physical optics; statistical analysis; submillimetre wave antennas; Gaussian optics; astronomical instruments; coherent natural modes; dyadic analysis; electromagnetic analysis; geometrical theory of diffraction; modal optics; output surface; partially coherent submillimeter-wave antenna systems; partially coherent vector field; physical optics; planar bolometers; plane waves; reflecting antennas; scattering matrices; second-order statistics; statistical properties; submillimeter-wave optical components; superposition; total transformed field reconstruction; uncorrelated natural modes; waveguide mode matching; waveguide multimode bolometers; Antenna accessories; Antennas and propagation; Electromagnetic analysis; Electromagnetic scattering; Electromagnetic waveguides; Geometrical optics; Optical scattering; Optical waveguides; Physical theory of diffraction; Submillimeter wave technology;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
