## Abstract The resonant CWTHA is examined via a moment‐method simulation. The results show a very high impedance at first resonance with a narrow bandwidth and low efficiency. At second resonance, the resistance is less than an ohm, the reactance is zero, and again, the bandwidth is narrow. The az
Two-turn contrawound toroidal helix antenna
✍ Scribed by R. C. Hansen
- Publisher
- John Wiley and Sons
- Year
- 2002
- Tongue
- English
- Weight
- 71 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0895-2477
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✦ Synopsis
Abstract
The two‐turn CWTHA is analyzed from a small diameter that allows constant current, through the third resonance. Around the third resonance, and around the first resonance and below, the bandwidth is much less than 1%. The very low (or very high) values of resistance make matching difficult and lossy. At the second resonance the resistance is modest, but the rapid change of reactance limits the bandwidth to a few percent. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 33: 251–252, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10289
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