A resistive linear antenna for ground-penetrating radars

Kangwook Kim; Waymond R. Scott Jr.

doi:10.1117/12.542694

21 September 2004 A resistive linear antenna for ground-penetrating radars

Kangwook Kim, Waymond R. Scott Jr.

Proceedings Volume 5415, Detection and Remediation Technologies for Mines and Minelike Targets IX; (2004) https://doi.org/10.1117/12.542694
Event: Defense and Security, 2004, Orlando, Florida, United States

Abstract

The resistive vee dipole (RVD) loaded with the Wu-King profile has many advantages for use in ground-penetrating radar (GPR) applications. It can be designed to transmit a temporally-short pulse to a small spot on the ground. The shape of the transmitted pulse is simply related to the input signal, e.g., a derivative. The RVD also has a low radar cross section. In addition, it can be easily manufactured using a circuit board and discretely loading it with chip resistors. One drawback of the RVD is that the input impedance of the RVD increases significantly with decreasing frequency and, therefore, has a high voltage standing wave ratio (VSWR) at low frequencies, which limits the low-frequency response of the antenna. To improve the low-frequency response, a discretely-loaded resistive linear antenna (RLA) has been developed, whose basic principle of operation is the same as that of the RVD. The RLA has curved arms loaded with a modified Wu-King profile instead of straight arms loaded with the Wu-King profile. With an appropriate selection of the curve and the loading profile, the low-frequency response is significantly better for the RLA than for the RVD. The RLA has been developed using a method of moments code. The performance of the RLA is validated both numerically and experimentally.

Citation Download Citation

Kangwook Kim and Waymond R. Scott Jr. "A resistive linear antenna for ground-penetrating radars", Proc. SPIE 5415, Detection and Remediation Technologies for Mines and Minelike Targets IX, (21 September 2004); https://doi.org/10.1117/12.542694

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