As　an　effective　active　remote　sensing　technology　for　the　exploration　of　shallow　underground　targets,　ground-penetrating　radar　(GPR)　is　a　detection　method　that　can　be　used　to　obtain　information　about　the　characteristics　of　underground　targets　by　transmitting　an　electromagnetic　wave　from　an　antenna　and　analyzing　the　propagation　of　the　electromagnetic　wave　underground.　Due　to　the　frequency　(1　MHz-3　GHz)　of　GPRs,　the　depth　of　geological　exploration　is　shallow　(0.1-30　m).　In　order　to　penetrate　the　deeper　Earth,　it　is　necessary　to　increase　the　size　of　the　antenna　in　accordance　with　the　wavelength　ratio　and,　thus,　reduce　the　radiation　frequency.　For　most　bi-static　antenna　GPRs,　a　dipole　antenna　is　used　as　the　transmitting　antenna　and　another　antenna　device　is　used　as　a　receiving　antenna,　with　both　being　horizontally　linearly　polarized　(LP)　antennas.　In　some　cases,　such　a　design　can　cause　problems,　such　as　the　multi-path　effect　and　polarization　mismatching.　When　a　GPR　is　used　for　deep　exploration,　increased　numbers　of　errors　and　greater　signal　attenuation　during　data　reception　and　processing　often　occur.　In　contrast,　at　the　radiation　source,　with　the　use　of　large-aperture　multiple-dipole　antennas　and　multi-channel　sequential　rotational　excitation,　the　electromagnetic　wave　can　radiate　in　the　form　of　circular　polarization　at　a　low　frequency.　In　the　receiving　antenna,　the　issues　caused　by　the　multi-path　effect　and　polarization　mismatching　can　be　addressed,　even　if　LP　antennas　are　used.　A　novel　sequential　rotationally　excited　(SRE)　circularly　polarized　(CP)　multiple-dipole　array　for　a　bi-static　antenna　GPR　for　deep　exploration　is　proposed　in　this　paper.　A　large-aperture　CP　multiple-dipole　array　is　used　instead　of　a　small-size　LP　dipole　antenna.　The　analysis　and　simulation　results　demonstrated　that,　comparing　circular　polarization　and　linear　polarization　with　the　premise　of　the　same　transmitting　power,　the　SRE　CP　multiple-dipole　antenna　array　radiation　source　achieved　a　significant　enhancement　(about　7　dB)　in　the　signal-to-noise　ratio　(SNR)　as　the　radiant　energy　was　collected　at　the　receiving　antenna.　More　importantly,　by　reducing　the　exploration　frequency　to　10　KHz,　the　exploration　depth　could　also　be　greatly　increased　by　about　tenfold.