Improved ultra-wide bandwidth bow-tie antenna with metamaterial lens for GPR applications

Koroth, Ajith K.; Bhattacharya, Amitabha

doi:10.1109/icgpr.2014.6970525

Cited by 29 publications

(18 citation statements)

References 15 publications

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“…Although high gain cannot be expected from resistively loaded antennas due to power dissipation in resistors, loading resistors on the folded radiating arm can improve the gain to some extent. Various methods are employed to improve the gain, such as arraying of similar antenna element [13,14], using a dielectric or metamaterial lens [15,16], and so on. For bow-tie antenna, a simple way to increase the gain is using cavitybacked structures [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Cavity‐backed bow‐tie antenna with dielectric loading for ground‐penetrating radar application

Liu

et al. 2019

IET Microwaves, Antennas & Propagation

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Bow‐tie antennas are widely used in practical ground‐penetrating radars. In spite of simple structure and wideband characteristics, boresight gain of the antenna is small and the radiation pattern is omnidirectional. In this study, a cavity‐backed bow‐tie antenna with dielectric loading is presented. The bow‐tie antenna is resistively loaded to reduce ringing effects. The resistively loaded antenna is placed within a rectangle cavity, which acts as a reflector, for unidirectional radiation and high gain. A dielectric is loaded on the antenna aperture to enlarge the operational bandwidth and stabilise the radiation patterns. Parameter studies of the dielectric substrate are performed to optimise the antenna performance. The final design is fabricated and measured. It has been shown that the antenna exhibits wide impedance bandwidth of 120% for VSWR≤2. The boresight gain is more than 5 dBi. The radiation patterns are stable and unidirectional over the whole band, and the late‐time ringing is small.

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Section: Introductionmentioning

confidence: 99%

Cavity‐backed bow‐tie antenna with dielectric loading for ground‐penetrating radar application

Liu

et al. 2019

IET Microwaves, Antennas & Propagation

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“…5 Low-frequency operation for more penetration depth and, besides good gain to increase range resolution, and also stable radiation pattern is the common requirements for a UWB GPR antenna. 6 UWB GPR is used in both military and civilian applications, due to high resolution and appropriate penetrating factors. UWB radars have used in the detection of land-mines and hidden human.…”

Section: Introductionmentioning

confidence: 99%

High gain UWB bow‐tie antenna design for ground penetrating radar application

Joula

Rafiei

Karamzadeh

2018

Micro & Optical Tech Letters

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This article presents an elliptical shaped slot ultra‐wideband antenna with high gain (10.3 dBi) and compact size (107.7 × 68 mm2) that designed and improved by four steps. Also, it can perform in an impedance bandwidth (IBW) from 0.98 GHz to 4.5 GHz that is satisfactory IBW for ground penetrating radar (GPR) application. The proposed antenna is fabricated for experimental testing and getting GPR images in a sandbox. Simulation and measured results ensure a desirable GPR antenna.

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“…Some of the results have been presented in a conference paper [18]. The experimental results including GPR scan result for detecting an object buried under soil are described in this paper.…”

Section: Introductionmentioning

confidence: 99%

Printed Compact Lens Antenna for Uhf Band Applications

Ajith¹,

Bhattacharya²

2016

PIER C

Self Cite

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Abstract-A new microwave lens antenna suitable for ultra-high frequency (UHF: 300 MHz-3 GHz) band applications is proposed. An improved bow-tie antenna and a planar metamaterial lens design is presented. 5 dB improvement in boresight gain and a directive radiation pattern is achieved with the lens. The application of the designed antenna is demonstrated in a ground penetrating radar (GPR) experiment. The size of the antenna is very compact compared to other antennas found in the literature used for similar applications.

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Improved ultra-wide bandwidth bow-tie antenna with metamaterial lens for GPR applications

Cited by 29 publications

References 15 publications

Cavity‐backed bow‐tie antenna with dielectric loading for ground‐penetrating radar application

Cavity‐backed bow‐tie antenna with dielectric loading for ground‐penetrating radar application

High gain UWB bow‐tie antenna design for ground penetrating radar application

Printed Compact Lens Antenna for Uhf Band Applications

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