Study of compressed log-periodic dipole antennas |
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Authors: | Bantin C. Balmain K. |
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Affiliation: | University of Toronto, Ont., Canada; |
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Abstract: | The behavior of log-periodic dipole (LPD) antennas, which are compressed along the transmission-line axis, is studied both experimentally and theoretically. Compressed LPD antennas are found to be efficient, of low gain, and frequency independent. With compression, the radiation pattern approaches dipole-like behavior and the bandwidth increases slightly. It is also found that LPD antennas exhibit anomalous frequency-dependent behavior in narrow bands of frequencies (approx 1/8of a log period in width) when a reactive termination is used and when the scaling factortauis below about 0.92-0.93. |
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