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Proceedings ArticleDOI

Design and validation of slot spiral antenna for stepped frequency ground penetrating radar

TL;DR: In this article, a dual arm slot spiral antenna operating over 600 MHz to 3000 MHz was designed and tested for a Stepped Frequency Ground Penetrating Radar (SFGPR) application.
Abstract: A wide band dual arm slot spiral antenna operating over 600 MHz to 3000 MHz was designed and tested for a Stepped Frequency Ground Penetrating Radar (SFGPR) application. This antenna is low profile, planar, uses a simple current element as the balanced feed. The influence of the receiver Intermediate Frequency (IF) Band Width (BW) on the Signal to Noise Ratio (SNR) for antenna operation under SFGPR mode is investigated for a metal rod buried inside dry sand.
Citations
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01 Jan 1996
TL;DR: In this paper, the advantages and disadvantages of a Ground Penetrating Radar (GPR) system which uses a network analyser as the radar signal generator and the radar receiver are discussed.
Abstract: This paper discusses the advantages and disadvantages of a Ground Penetrating Radar (GPR) system which utilises a network analyser as the radar signal generator and the radar receiver. Practical test results are presented in order to show the performance of this GPR system based on the use of a HP-8753 network analyser.

51 citations

Journal ArticleDOI
TL;DR: In this article , a compact cavity-backed logarithmic spiral antenna with an integrated broadband planar balun is presented for detecting anti-personnel (AP) landmines in GPR systems.
Abstract: ABSTRACT In this paper, a compact cavity-backed logarithmic spiral antenna with an integrated broadband planar balun is presented. This fully planar antenna is used for detection of anti-personnel (AP) landmines in GPR systems. Unlike conventional spiral antennas, which are fed by unbalanced coaxial cable or vertical baluns, and these feed lines make them bulky and frail, in this design, a microstrip-to-parallel strip balun is integrated with the spiral antenna and makes the whole structure compact, planar, and robust. Moreover, a metal cavity is utilized at the back of the antenna to prevent backward radiation and enhance the forward penetration depth to the ground. In choosing the operational frequency bandwidth, a compromise is made between the penetration depth and detection resolution. A prototype of the antenna is fabricated and its performance in landmine detection is evaluated with measurements. The measured results show that the antenna works over the frequency range of 1.5 GHz−4.5 GHz (bandwidth = 100%) with |S11| < −10 dB, a penetration depth of 10 cm in the soil with good detection resolution, gain >8 dB and axial ratio <3 dB. These factors make the proposed antenna a suitable candidate for pulse radar applications, in which low pulse distortion and wide bandwidth are key factors.
References
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DOI
01 Aug 1988
TL;DR: Subsurface radar techniques are increasingly being used for the detection and location of buried artefacts and structures within the upper regions of the earth's surface as mentioned in this paper, and the work done to date in this field, laying emphasis on the range of applications and the need for system design to match the intended application.
Abstract: Subsurface radar techniques are increasingly being used for the detection and location of buried artefacts and structures within the upper regions of the earth's surface. The paper reviews the work done to date in this field, laying emphasis on the range of applications and the need for system design to match the intended application. An overall design strategy is outlined, together with a more detailed treatment of a range of topics which are relevant to effective subsurface radar operation. These include the dielectric properties of earth materials, signal modulation schemes, design and construction of suitable antennas, and methods of signal processing. Finally, an assessment is made of future prospects, both technical and commercial, for this developing area of radar technology.

297 citations

01 Jan 1996
TL;DR: In this paper, the advantages and disadvantages of a Ground Penetrating Radar (GPR) system which uses a network analyser as the radar signal generator and the radar receiver are discussed.
Abstract: This paper discusses the advantages and disadvantages of a Ground Penetrating Radar (GPR) system which utilises a network analyser as the radar signal generator and the radar receiver. Practical test results are presented in order to show the performance of this GPR system based on the use of a HP-8753 network analyser.

51 citations

Journal ArticleDOI
TL;DR: In this article, a step-frequency ground penetrating radar (SFGPR) prototype operating across the 10-620 MHz frequency band is described, which employs a short gate at each frequency step that can suppress unwanted strong signals relative to weak reflections from deep targets.

38 citations

Journal ArticleDOI
TL;DR: The advantages and disadvantages of a Ground Penetrating Radar (GPR) system which utilises a network analyser as the radar signal generator and the radar receiver are discussed.

37 citations


"Design and validation of slot spira..." refers background in this paper

  • ...In [3], different antennas operating in varying frequency sub ranges were studied and their time and frequency domain data were analyzed for SFCW operation....

    [...]

Journal ArticleDOI
TL;DR: The ability of the radar to detect dielectric objects and to exhibit their shape as it works with circularly polarized waves is shown and the calibration procedures as well as the synthetic aperture procedure were developed and validated based on measured data with the SFCW radar.
Abstract: This paper presents some experimental results obtained with newly developed stepped-frequency continuous wave (SFCW) ground-penetrating radar in a frequency range from 400 to 4845 MHz. This paper describes the procedures to remove the delays within the transmitter, the receiver, and the antenna system and analyzes the experimental results obtained after processing the measured data. The measured system footprint and the experimental results show that using an ultrawideband (UWB) Archimedean spiral antenna decreases the coupling signal but does not provide the needed cross-range resolution. Based on the measured dimensions of the footprint, a synthetic aperture procedure is used to improve the radar cross-range resolution from around 60 cm to about 6 cm. This paper shows the ability of the radar to detect dielectric objects and to exhibit their shape as it works with circularly polarized waves. What makes this paper different from prior work, which presents some experiments using a vector network analyzer set up to work as an SFCW radar, is that the data were acquired with a real system working with circular polarization and using two UWB Archimedean spirals. The calibration procedures as well as the synthetic aperture procedure were developed and validated based on measured data with the SFCW radar.

32 citations


"Design and validation of slot spira..." refers background in this paper

  • ...However, the procedure to remove such delays has been reported [6]....

    [...]