Mutual Coupling Between Rectangular Dielectric Resonator Antenna Elements
Abstract
Dielectric resonator antennas (DRAs) have been suggested as a potentially efficient antenna for use in Personal Communication Systems, Global Positioning Systems and wireless computer networks. They offer several advantages, such as high efficiency, large bandwidth, low profile, small size, ease of fabrication, and low production cost. This paper examines characteristics of the rectangular DRA, both as individual radiating elements as well as elements in array environments. Numerical methods are used to obtain detailed information with respect to the resonant frequency, bandwidth, scattering parameters, input impedance, field structures and radiation patterns on which DRA design is based. This obtained information is then used to help in understanding and quantizing the interaction between elements in close proximity, i.e. mutual coupling. This coupling analysis provides important information for the array design process, as well as the necessary information required to positively exploit these coupling characteristics. The simulation software provides data that very closely matches both experimentation and the theoretical models. Mutual coupling measurements indicate that, beyond a spacing of one half-wavelength, there is very little mutual interaction. This mutual coupling was exploited at lesser distances however with parasitically coupled dielectric elements used to create novel single feed multi-element antennas with altered resonant frequencies, increased bandwidth and enhanced radiation patterns, as compared to a single element.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1998
- Accession Number
- ADA359245
Entities
People
- Aldo Petosa
- Bruce Henry
- Gilbert A. Morin
- Yahia M. Antar
Organizations
- Defence Research and Development Canada