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Title: A study on the mutual coupling effects between 2 rectangular patch antennas as a function of their separation and angles of elevation
Keywords: mutual coupling, rectangular, patch, microstrip, cavity method, reaction theorem
Issue Date: 30-Apr-2004
Citation: SEOW THOMAS (2004-04-30). A study on the mutual coupling effects between 2 rectangular patch antennas as a function of their separation and angles of elevation. ScholarBank@NUS Repository.
Abstract: Today, the number of different types of antenna in existence is very large, with each type bearing its specific characteristics serving a specific purpose. With the development of Printed Circuit Boards, and importance placed on mobility and agility, microwave patch antennas grew popular as well. Because of their small size and lightweight, the microstrip antenna is fast replacing many conventional antennas. By the fact that many characteristics of a single microstrip patch antenna can be modified and engineered to requirement and as desired through the use of array theory and technology, the microstrip patch antenna array soon became an area of intense study and research. In creating microstrip antenna arrays, because of the closeness of the microstrip antenna patches, a host of other related issues arises, chief of which is the problem of coupling between the patch antennas.Coupling not only affects the input impedance of the elements of the array, it also interferes and corrupts signals with noise thereby causing deterioration to the communication system. Essentially, it does not allow analysis of the antenna system using simple mathematical tools such as the theory of superposition.To understand mutual coupling effects is to know when an antenna system no longer performs according to specifications. It is for this knowledge that many researches have been carried out on the effects on mutual coupling on microstrip patch antennas. However, researches have so far been confined to the study of mutual coupling effects between antennas on the same plane and based on a single directional variation of the distance between them.The objective of our study is two-fold: (i) to develop a formulation that can effectively predict the mutual coupling between two rectangular microstrip patch antennas that are not confined to the same plane. The formulation that was developed is based on the Cavity Model and using the Reaction Theorem for a pair of arbitrarily oriented rectangular patches; (ii) to verify the formulation developed through the fabrication of the microstrip patch antennas and the measurement of their S-parameters with the use of a network analyzer.
Appears in Collections:Master's Theses (Open)

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