Zobrazeno 1 - 10
of 265
pro vyhledávání: '"N.G. Alexopoulos"'
Publikováno v:
IEEE Transactions on Antennas and Propagation. 48:107-116
This paper presents the theoretical design of an artificial dielectric exhibiting narrowband frequency selective properties in the bulk without relying on periodic placement of elements. In this manner, it initiates a novel approach that bypasses the
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 45:330-337
Microstrip elements of arbitrary shape are modeled in multilayered media. The Green's function for the multilayered structure is developed in a form useful for efficient computation for interacting microstrip elements, which may be located at any sub
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 44:2457-2465
The introduction of the printed aperture into multiport microstrip circuits as a vertical transition proves to be practical in the design as well as the manufacturing process of multilayered circuits. With the mixed-potential integral equation-based
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 44:2504-2511
This paper presents a methodology for the design of multiple via-hole and air-bridge transitions of arbitrary shape in multilayered multi-port microstrip circuits. Application of multiple via holes to the design of microstrip filters and other device
Publikováno v:
IEEE Transactions on Antennas and Propagation. 42:1556-1562
A full-wave analysis of cavity-backed aperture antennas with a dielectric overlay is presented. The theoretical approach uses a closed-form dyadic Green's function in the spectral domain. The aperture equivalent magnetic currents are obtained using t
Publikováno v:
IEEE Transactions on Antennas and Propagation. 41:1610-1614
The radar cross section (RCS) of a rectangular microstrip patch on a lossy biased ferrite substrate is investigated. The analysis is based on a full-wave integral equation formulation in conjunction with the method of moments. In the analysis, the di
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 40:613-621
Surface waves due to a current source on a grounded ferrite slab are investigated. Electromagnetic fields of the structure are in terms of a continuous plane wave spectrum. The spectrum of each field component is obtained numerically through the expo
Autor:
G.E. Antilla, N.G. Alexopoulos
Publikováno v:
IEEE Transactions on Antennas and Propagation. 39:1707-1715
The scattering cross section of microstrip dipoles is examined. The primary emphasis is to demonstrate the effects of surface waves on the scattering cross section, and to provide a simple physical understanding of the surface wave mechanism. The ele
Publikováno v:
IEEE Transactions on Antennas and Propagation. 38:145-151
Design techniques and procedures for microstrip dipole arrays transversely fed by proximity coupled microstrip lines are presented. Two design equations which include the effects of mutual coupling are developed, and the corresponding design curves a
Autor:
C.-L. Chi, N.G. Alexopoulos
Publikováno v:
IEEE Transactions on Antennas and Propagation. 38:1399-1404
An efficient numerical approach to model antennas that include a microstrip element radiating in the presence of material layers is developed. The class of antennas considered is fed through the ground plane by a coaxial transmission line. The reacti