Lee, TK Kim, SY Ra, JW 2024-01-21T13:04:44Z 2024-01-21T13:04:44Z 2021-09-04 2001-01 0916-8516 https://pubs.kist.re.kr/handle/201004/140832 The capability of frequency-swept cross-borehole radar to detect an empty rectangular cylinder embedded in a. dielectric medium is simulated numerically by employing the boundary element method. The frequency loci providing the strongest double dips in the received signal pattern are plotted as functions of the observation distance and the cross-sectional width. It is found that, regardless of the shape of thf rectangular cross-section, the strongest double dips become double nulls in the near-field region. English IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG Diffraction pattern by an empty rectangular cylinder in a dielectric Article 1 IEICE TRANSACTIONS ON COMMUNICATIONS, v.E84B, no.1, pp.124 - 127 IEICE TRANSACTIONS ON COMMUNICATIONS E84B 1 124 127 N scie scopus 000166624200017 Engineering, Electrical & Electronic Telecommunications Engineering Telecommunications Letter geophysical probing cross-borehole radar diffraction pattern tunnel signature