Ground Penetrating Radar (GPR) Antennas
Geotech manufactures interchangeable GPR antennas for engineering, geological, utility, concrete, road and railway investigations. The product range includes shielded, horn, dual-frequency, low-frequency and high-speed antennas for different survey depths, resolutions and operating conditions.
Lower-frequency antennas are generally selected when greater investigation depth is required, while higher-frequency antennas provide more detailed imaging of smaller targets at shallower depths. Dual-frequency configurations allow shallow and deeper targets to be investigated during the same survey.
Geotech GPR antennas can be used for:
- utility locating and underground mapping;
- concrete and reinforcement inspection;
- road, bridge and runway assessment;
- railway ballast and subgrade investigation;
- geological and environmental surveys;
- archaeology and buried-object detection;
- ice and hydraulic-structure inspection.
The appropriate antenna depends on the required investigation depth, target size, material properties, survey speed and environmental conditions. Antenna performance may vary depending on soil conductivity, moisture and other site-specific factors.
Contact the Geotech engineering team to compare available antenna models and receive a recommended GPR configuration for your project.
How to Choose a GPR Antenna
Which GPR antenna frequency should I choose?
Lower-frequency antennas generally provide greater investigation depth but lower resolution. Higher-frequency antennas provide more detailed results at shallower depths. The appropriate frequency depends on the target size, expected depth and properties of the investigated material.
What is the difference between shielded and horn antennas?
Shielded antennas help reduce unwanted signals and above-ground reflections during ground-coupled surveys. Horn antennas are suitable for contactless and high-speed inspection of roads, railways and other elongated structures.
When should I use a dual-frequency GPR antenna?
A dual-frequency antenna is useful when shallow and deeper targets need to be investigated simultaneously. It combines two frequency ranges within one survey configuration.
Are Geotech antennas interchangeable?
Geotech offers interchangeable antennas compatible with its GPR control and control-processing units. The final configuration should be selected according to the system model, survey method and operating conditions.
Antennas covers frequencies from 50 MHz for deep geological surveying to up to 2500 MHz for high‐resolution investigations. Using low-frequency antennas, one can increase the depth of sounding. If high resolution scanning of the near surface section is required, though, it is advisable to use high-frequency antennas. A combination of antennas with different frequencies yields best results.
| Type | Antenna (АB) | Сentral Frequency АB, МHz | Maximum depth of penetration, m | Resolution, сm | Power consumption, Watt | Dimensions, mm | Weight, kg |
| Shielded | АB-2500M | 2500 | 0,6 | 1,5 | 3 | 220x172x120 | 0,9 |
| АB-1700M | 1700 | 1 | 3 | 3 | 220x172x120 | 0,9 | |
| АB-1200M | 1200 | 1,5 | 3 | 3 | 220x172x120 | 0,9 | |
| АB-900M | 900 | 1,5 | 3 | 3 | 290x185x140 | 2,3 | |
| АB-700M | 700 | 3 | 10 | 3,6 |
230x170x110 |
2,2 | |
| AB-400M | 400 | 5 | 5 | 5 |
520x290x170 |
4,5 | |
| AB-250M | 250 | 8 | 25 | 6 |
740x460x150 |
10 | |
| АB-150M | 150 | 12 | 35 | 6 |
930x800x280 |
16 | |
| АB-100M | 100 | 14 | 45 | 7,3 |
930x800x280 |
16 | |
| АB-90 | 90 | 16 | 50 | 5 |
2270x1075x350 |
39 | |
| Horn | АB-2500R | 2500 | 0,4 | 1,5 | 3 |
320x300x160 |
1,7 |
| АB-2000R | 2000 | 0,6 | 2 | 3 |
320x300x160 |
1,7 | |
| АB-1700R | 1700 | 0,8 | 3 | 3 |
200x188x165 |
1,2 | |
| AB-1000R | 1000 | 1,5 | 4 | 3 |
630x200x525 |
7,3 | |
| АB-400R | 400 | 3 | 10 | 5,5 |
725x570x370 |
9,5 | |
| Dual-frequency | AB-300/900 | 300/900 | 7 and 2,5 | 20 and 8 | 7,8 | 740x460x150 | 11 |
| АB-250/700 | 250/700 | 8 and 3 | 25 and 10 | 7,8 | 740x460x150 | 11 | |
| АB-150/400 | 150/ 400 | 12 and 5 | 35 and 15 | 8 | 930x800x280 | 16,5 |
All of these antennas are interchangeable, compatible with the control unit or control processing unit, with a variety of different applications.
The system includes a control unit or a control processing unit and antennas with frequencies from 50 to 2500 MHz. All of these antennas are interchangeable, compatible with the control unit or control processing unit, with a variety of different applications.
SHIELDED ANTENNAS
For efficient work in conditions of existing air jamming (i.e. buildings, construction, power transmission lines, etc.), a set of antennas with shielded screen receivers and transmitters, protecting against the potentially harmful effect from the top semi-sphere, are available.
DUAL-FREQUENCY ANTENNAS
The integrated multi-frequency GPR OKO-3 is designed for automated location of objects at different depths, simultaneously and in real time. This GPR combines a control unit and two antennas with the different frequencies.
HORN ANTENNAS
Horn antennas are ideal for tasks associated with the high-speed GPR surveying of elongated objects such as motorways and railways, which require ground lift-off GPR location.
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TRITON-M (all-in-one monoblock)
Antenna «Triton-M» is unshielded antenna with the frequencies 50/100 MHz. The Antenna consists of 3 segments which allows you to select the central frequency (25 or 50 or 100 MHz). The TritonM can be controlled from PC or tablet PC....
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AB-2500M
Multi-purpose antenna with central frequency of 2500 MHz, depth of sounding up to 0,6 meter, resolution 0,015 meter
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AB-1700M
Antenna with central frequency of 1700 MHz, opportunity to survey at a distance up to 0,02 meter above surface, opportunity of near-surface layer detailed survey, depth of sounding up to 1 meter, resolution 0,03 meter
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AB-1700U
Multi-purpose antenna with central frequency of 1700 MHz, removable mono ski, opportunity to use both built-in displacement transducer and displacement transducer DP-32, depth of sounding up to 1 meter, resolution 0,03 meter GPR cross-section (AB-1700U)
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AB-1200M
Antenna with central frequency of 1200 MHz, removable mono ski, opportunity to use both built-in displacement transducer and displacement transducer DP-32, depth of sounding up to 1,5 meter, resolution 0,05 meter GPR cross-section in the central part of bridge (AB-1200M)...
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AB-1200U
Antenna with central frequency of 1200 MHz, removable mono ski, opportunity to use both built-in displacement transducer and displacement transducer DP-32, depth of sounding up to 1,5 meter, resolution 0,05 meter GPR cross-section in the central part of bridge (AB-1200U)...
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AB-900M
Antenna with central frequency of 900 MHz, depth of sounding up to 2,5 meter, resolution 0,08 meter
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AB-700M
Antenna with central frequency of 700 MHz, depth of sounding up to 3 meter, resolution 0,1 meter GPR cross-section of runway
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AB-400M
Antenna (monoblock) with central frequency of 400 MHz, depth of sounding up to 5 meter, resolution 0,15 meter