Comments on the design of log-periodic dipole antennas
- 1 May 1973
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Antennas and Propagation
- Vol. 21 (3), 303-308
- https://doi.org/10.1109/tap.1973.1140476
Abstract
The design procedure of the log-periodic dipole (LPD) antennas is discussed. The results of the calculations carried out by the use of the more recent and accurate methods of the analysis for the arrays of unequal dipoles, are compared with those already available in the literature. The calculations refer to the gain of LPD antenna as a function ofZ_{0}, the characteristic impedance of the exciting transmission line, ofh/a, the ratio between the half-length and the radius of dipoles, of\tauand\sigma, two parameters which describe the geometry of the LPD antenna. The values of gain are lower than those given by earlier calculations. The degradation of the gain is more consistent, when the values either ofZ_{0}orh/aare increased with respect toZ_{0} = 100 \Omegaandh/a = 125, which are parameters often used in the literature. The many diagrams included in this paper for different values of\tau, \sigma, Z_{0}, andh/acan be useful in a more accurate design of an LPD antenna. Confirmation of the computer data has been obtained by the tests performed on various scale models and on a full scale antenna.This publication has 6 references indexed in Scilit:
- Study of compressed log-periodic dipole antennasIEEE Transactions on Antennas and Propagation, 1970
- Mutual coupling between log-periodic antennasIEEE Transactions on Antennas and Propagation, 1970
- Arrays of Cylindrical DipolesPublished by Cambridge University Press (CUP) ,1968
- Arrays of Unequal and Unequally Spaced DipolesRadio Science, 1967
- Long‐Periodic Dipole AntennaRadio Science, 1967
- Log periodic dipole arraysIEEE Transactions on Antennas and Propagation, 1960