Green's function based digital technique applied to the analysis of an antenna consisting of a network of microstrip patches

• Published in: International journal of electronics 1990-10, Vol.69 (4), p.563-573
• Main Authors: TONYE, E., NGAKU, J.
• Format: Article
• Language: English
• Subjects: Applied sciences; Exact sciences and technology; Radiocommunications; Telecommunications; Telecommunications and information theory
• ISSN: 0020-7217; 1362-3060
• DOI: 10.1080/00207219008920340

The Green's function approach has often been used to compute the far fields from single arbitrary radiating microstrip elements. The approach is here extended to the determination, in analytic form, of the far fields from a network of arbitrary elements. A software characterization of the far electromagnetic field radiated by a network of plane microstrip antennas based on this extension has been realized. An antenna can be made up of one or more patches, with different parameters (dielectric constant and thickness, length and width of patch, gap between patches, operating work frequency). The software divides each patch into a finite number of Hertz dipoles, each assumed to be excited by a unit-step current. The electromagnetic field radiated by such a dipole yields Green's functions. Then, applying a superposition technique, the radiation patterns of the whole network are obtained in terms of co-polar and cross-polar components. Examples of radiation patterns of networks determined using the program include: a single rectangular patch; two rectangular patches in the x-direction; two rectangular patches in the y-direction; two diagonally oriented rectangular patches; and four rectangular patches.