The direction characteristic of radiation wave of array dipole source in the conductive strata
阵列偶极源辐射场在导电地层中传播的方向特性

When the double and array dipoles are put in the conductive media, the formula of radiation field of them have been derived from vector potential equation of single dipole. The formula is not only suitable for near-field but also for induced-field and far-field. In this paper, the interferential characters of radiation field of array dipoles are discussed in detail. From the result, we can know that the strongest electromagnetic signal can be obtained by choosing the azimuth for the layer stratum, and we also know that the signal is direct ratio with the number of array dipoles, which may be applied to resolving attenuation problem of electromagnetic signal for crosshole electromagnetic logging.