Antenna assembly for microwave reflection survey equipment

摘要: An antenna assembly is provided for use in locating buried objects, particularly long thin objects such as pipes can be located, determining the position, and ascertaining pipe direction by taking measurements from a single point, without mechanical movement of antenna, allowing better suppression spurious signals reduction false indications; which has plurality arms adapted arranged to transmit receive radiation into ground characterized that have, on at least surface nearest ground, cladding substantially lossless dielectric material, relative permitivity said being 3.5 thickness coating λ d /20 where wavelength lowest frequency transmitted antenna.