Title :
Calculation of the surface-wave excitation in multilayered structures
Author :
Thieme, Markus O. ; Biebl, Erwin M.
Author_Institution :
Inst. fur Hochfrequenztech., Tech. Univ. Munchen, Germany
fDate :
5/1/1998 12:00:00 AM
Abstract :
A novel rigorous analysis of the surface waves excited by a Hertzian dipole embedded in a multilayered structure is presented. A transmission-line resonator equivalent circuit is used to calculate the surface wave´s electromagnetic field components. It is shown that the power carried by the surface waves is related to the energy stored in the resonator. An analytical method for the calculation of the stored energy is given. A simple algorithm iterating over the layers of the structure is derived to analytically calculate the surface wave´s electromagnetic field components and the power carried by surface waves. The need of numerical integration or calculation of residues is omitted. This benefits a reduction in computation time and an improvement in accuracy and versatility of computer-aided design (CAD) programs. The presented method has been implemented in a microwave CAD program. Numerical results for planar antennas are presented
Keywords :
CAD; Green´s function methods; antennas; dipole antennas; electrical engineering computing; electromagnetic fields; equivalent circuits; microstrip resonators; resonators; spectral-domain analysis; transmission line theory; Hertzian dipole; accuracy; analytical method; computation time reduction; computer-aided design; electromagnetic field components; microstrip structure; microwave CAD program; multilayered structures; planar antennas; stored energy; surface-wave excitation; transmission-line resonator equivalent circuit; Algorithm design and analysis; Design automation; Dielectric substrates; Electromagnetic analysis; Electromagnetic fields; Equivalent circuits; Planar arrays; Power transmission lines; Surface waves; Transmission line theory;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
