TY - JOUR
T1 - Borehole radar measurements
AU - Sato, Motoyuki
PY - 1990/12/1
Y1 - 1990/12/1
N2 - An analysis of transient responses between dipole antennas set in parallel boreholes is presented in order to obtain a basic understanding of the operation of borehole radars. The theoretical response was derived, and the results are found to agree well with measured data in a salt deposit. The guided wave induced on the cable and its effect on the antenna radiation pattern are considered. Although the direct wave from the transmitting antenna to the receiving antenna is always dominant, the induced guided wave along the coaxial cable suspending the receiving antenna is not negligibly small. Deformation of the radiation pattern is mainly caused by this guided wave, and it can be suppressed to some extent by loading ferrite cores on the cable.
AB - An analysis of transient responses between dipole antennas set in parallel boreholes is presented in order to obtain a basic understanding of the operation of borehole radars. The theoretical response was derived, and the results are found to agree well with measured data in a salt deposit. The guided wave induced on the cable and its effect on the antenna radiation pattern are considered. Although the direct wave from the transmitting antenna to the receiving antenna is always dominant, the induced guided wave along the coaxial cable suspending the receiving antenna is not negligibly small. Deformation of the radiation pattern is mainly caused by this guided wave, and it can be suppressed to some extent by loading ferrite cores on the cable.
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M3 - Conference article
AN - SCOPUS:0025563948
VL - 2
SP - 1044
EP - 1047
JO - AP-S International Symposium (Digest) (IEEE Antennas and Propagation Society)
JF - AP-S International Symposium (Digest) (IEEE Antennas and Propagation Society)
SN - 0272-4693
T2 - 1990 Antennas and Propagation Symposium Digest
Y2 - 7 May 1990 through 11 May 1990
ER -