Multi-channel GPRs compare favorably with single-channel GPRs primarily in terms of performance. In the case of a single-channel GPR, for each range of the investigated depths, it is necessary to connect antennas with certain frequency characteristics and move the GPR several times along the same route, each time changing the antenna.

In the case of using a multichannel GPR, which includes several simultaneously operating antennas, for one movement of the GPR along the route, the researcher receives several radarograms at once. The signals on these radarograms have different resolutions and penetration depths. Radarograms from high frequency antennas have better signal resolution than radarograms from low frequency antennas, however, low frequency antennas provide greater depth of investigation.

For the convenience of processing and interpretation, these separate radarograms can be combined into one GPR profile. The depth of this resulting GPR profile will depend on the sounding depth of the lowest frequency antenna included in the multi-channel GPR. The resolution of signals in some range of depths of this resulting profile will depend on the frequency response of the antenna, whose signals will be located in this range of depths.