A magnetic‐loop based monopole antenna for GPR applications

Abstract

A new planar antenna is proposed for multiple applications in ground‐penetrating radar. The proposed antenna offers ultra‐wide band characteristics ranging from 100 MHz to 6 GHz. The antenna composed of two elements: an electrical tree‐shaped portion and a magnetic loop antenna, made by joining an electrical antenna with a ground plane via 50 Ohm resistor. The loop antenna portion provides a low‐frequency operation without increasing physical size of the antenna. Proposed antenna has relatively small dimensions 20 × 22.5 cm2 as compared with similar antennas covering the same bandwidth. Time domain analysis of this antenna is done to check its performance for applications in impulse‐based radar systems. The antenna has been manufactured and experimental results are added to validate simulation results.

A Wideband Reflector-Backed Antenna for Applications in GPR

“…is configuration created a uniformly tapered bowtie-shaped radiating slot with a separation of 2 mm in the middle and 20 mm on the sides. e uniformly tapered bowtie-shaped radiating slot changes the direction and effective length of surface current on the radiator [23,24]. A resistor is placed at the center of the slot for lower band operation.…”

Wideband tapered slot antenna for applications in ground penetrating radar

“…16 RL technique is found useful to obtain lower operation bands without having any impact on the overall size of the antenna. 3,17 Resistively loaded antennas have disadvantage of lower gain due to power dissipation in resistors, despite their lower gain resistively loaded antenna are frequently used in GPRs. 5,12,18,19 For application of antennas in GPR increase in resistor value increases amplitude of received signal.…”

“…The requirements of antenna size reduction at lower frequencies and achieving large bandwidth simultaneously make the GPR antenna design a challenging task . RL technique is found useful to obtain lower operation bands without having any impact on the overall size of the antenna . Resistively loaded antennas have disadvantage of lower gain due to power dissipation in resistors, despite their lower gain resistively loaded antenna are frequently used in GPRs .…”

Radiation Enhancement of an Ultrawideband Unidirectional Folded Bowtie Antenna for GPR Applications

“…Impulse-based radar systems are cost-effective and have simple design, therefore this type of system is preferred in commercial GPR applications. [2] The antenna system is one of the most critical parts of the GPR system. Ultra-wideband technology, which was used in the field of wireless communication early on, has now been applied to the field of GPR by many researchers because of the strong penetrability and better resolution.…”

“…First are aircoupled antennas such as horn antennas [6], [7], the tapered slot antennas (TSA), and their variants [8], [9], which are normally 40-50 cm above the ground surface. Another type concludes many planar antennas that are suitable for working close to the ground, such as loaded dipole [10], spiral [11], [12], microstrip monopole [2], [13], [14], the bowtie antenna and its variants [15], [16]. The groundcoupled antennas could work tightly against or 5-10cm above the ground surface.…”