Procedures using Artificial Neural Networks (ANN) are developed for characterizing square microstrip antennas. A Multi-Layer Perceptron (MLP) is used to find out the resonant frequency of the antennas. Same ANN is used to accomplish the task of obtaining different important antenna characteristics like gain, return loss and bandwidth of operation at once. The developed ANN is tested experimenta...

The microstrip patch is one of the most preferred antenna structures for low cost and compact design for wireless system and RF application. Dual-Band antennas are of a relative interest since they can support multiple communication systems. In this paper we present design of a novel compact small size microstrip antenna suitable for dual-band operations. By loading properly arranged slots on a...

Microstrip-line-feeding waveguide aperture antenna is developed in the 70-90 GHz band. A double-layer LTCC substrate is attached to the waveguide aperture opened on the wall of the metal package. The bandwidth over 20 GHz is observed in the simulation and the experiment.

Next generation wireless communiaction terminals will demand the use of advanced component integration process and high density packaging technologies in order to reduce size and to increase performance. The ability of the MCM-D low-cost Large Area Panel Processing technology to provide controlled impedance, microstrip, coplanar structures and integrated thin film passive components with useful...

the existence of some geometrically imperfect members, like initial curvature in a double layer space structures with hundreds or thousands of members is almost inevitable. these imperfections give rise to loss of load bearing capacity of double layer space structures. to evaluate the effect of initial member imperfection on load bearing capacity of double layer space structures and their failu...

Acknowledgments The Author would like to kindly thank Prof. Georg Splitt for his valuable advice and consenting to the use of the Mstrip40 program, Dr. Graham French for the inspiration and motivation behind the lab manual. Dedication This manual is dedicated to the staff who have taught, encouraged and guided me throughout my course at the University of Canberra. Foreword There is a need for a...

Some recent investigations on multiband microstrip antennas have been focused upon obtaining the frequencies of interest, however, much less attention is paid to obtain a relatively stable high-gain [1], [2]. A single-layer circular microstrip antenna with 2-D defected ground structure (DGS) was reported to obtain the stable gain [3]. However, it might be difficult to increase the gain of this ...

This paper presents some apprilcations of neural networks in the microwave modeling. The applications are related to modeling of either passive or active structures and devices. Modeling is performed using not only simple multilayer perceptron network (MLP) but also advanced knowledge based neural network (KBNN) structures. Keywords–Neural network, modeling, microwave, microstrip gap, microwave...

An important issue in antenna array design is reduction of mutual coupling. In microstrip antennas this reduction can be achieved by using electromagnetic band-gap (EBG) structures. These structures prevent the propagation of surface waves on the substrate of a microstrip antenna array. This paper presents a new configuration of a planar compact electromagnetic bandgap structure to reduce mutua...