In this article, pattern nulling techniques for linear antenna arrays that make use of phase and position perturbations based on the genetic algorithm are in¨estigated, respecti¨ely. Both nulling techniques are found to be capable of steering the array nulls to the prescribed interference directions
Techniques for the computation of the mutual coupling between two rectangular microstrip antenna elements with thick substrates
✍ Scribed by Mehmet Kara
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 240 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0895-2477
No coin nor oath required. For personal study only.
✦ Synopsis
Simple techniques ha¨e been de¨eloped for e¨aluating mutual coupling coefficients between two identical probe-fed rectangular antenna elements with thick substrates. They are based on the ¨olume equi¨alence theorem and a theoretical model equi¨alent to a lossy transmission line, and they take into account surface wa¨e contribution, mismatching, effecti¨e dimensions of the antenna elements, the relati¨e dielectric constant, and thickness of the substrate. The measured and calculated mutual coupling coefficients are presented as a function of separations between two antenna elements with substrates thicker than those reported elsewhere in E-and H-plane coupling configurations for the dominant TM mode. These techniques are simple, and are easily 10 included in a CAD system. The calculated results are in good agreement with the measurements.
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