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FDTD analysis of a plasma whip antenna

✍ Scribed by Z. H. Qian; R. S. Chen; H. W. Yang; K. W. Leung; Edward K. N. Yung

Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
132 KB
Volume
47
Category
Article
ISSN
0895-2477

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✦ Synopsis

order of increasing losses. Figure 1 shows that it is possible that the correlation decreases with increasing losses, but it also shows the general tendency of pattern correlation to increase. If the antenna pair is physically symmetric and the added losses are asymmetric (that is, the dissipating material is not very close to the array), then Figures 1 and 2 are realistic. However, if the pair and the added losses are symmetric, then only the phase differences of 0°or 180°a re possible, with the lowest or highest level of pattern correlation and with maximum or minimum difference between the reflectedpower eigenvalues.

4. CONCLUSION

An exact matrix expression has been presented for the dependency of the pattern correlation for the reflected-power and dissipatedpower rates. In the lossless case, the scattering matrix defines the pattern-correlation matrix exactly. However, in the more realistic case of lossy arrays, that is, for handheld devices, the losses need to be taken into account. Since the losses cannot be determined exactly in the general case, the pattern correlation can only be estimated.

REFERENCES

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