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Shortening ratios of modified dipole antennas

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4 Author(s)
H. Nakano ; Hosei University, Tokyo, Japan ; H. Tagami ; A. Yoshizawa ; J. Yamauchi

Two types of modified dipole antennas, zigzag and meander-line types, are analyzed and the shortening ratios are calculated. A zigzag dipole antenna with a wire length of 0.58 wavelengths has a shortening ratio of 24 percent with a resonant resistance of 46 \Omega . A meander-line dipole antenna with a wire length of 0.70 wavelengths has a shortening ratio of 30 percent with a resonant resistance of 43 \Omega . It is found that the radiation patterns of these two types of antennas are similar to the radiation pattern of a conventional half-wave linear dipole antenna.

Published in:

IEEE Transactions on Antennas and Propagation  (Volume:32 ,  Issue: 4 )