A threshold electromagnetic classification approach for cylinders embedded in a lossy medium by using a neural network technique
✍ Scribed by E. Bermani; S. Caorsi; M. Raffetto
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- English
- Weight
- 97 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0895-2477
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✦ Synopsis
measured resonant frequency of 1021 MHz is in good agreement with the theoretical value of 1040 MHz. The theoretical and measured radiation patterns in the E-and H-planes are Ž . shown in Figure 2 d . In the measured pattern, a dip of about 8 dB is observed in the broadside direction instead of a conical pattern. The cross-polar levels are higher than the theoretical values. This may be due to the finite size of the Ž . ground plane 10 cm = 10 cm , whereas in the analysis, an infinite ground plane has been assumed.
IV. CONCLUSION
A single chip-resistor-loaded RMSA yields dual-frequency operation with a wider bandwidth at the expense of efficiency. An RMSA loaded with two 1 ⍀ chip resistors gave a conical radiation pattern. The theoretical results obtained using MNM are in agreement with the experimental results.