K&lt;inf&gt;a&lt;/inf&gt;-Band dielectric lens antenna for resolution enhancement of a GPR

Panzner, Berthold; Joestingmeier, A.; Omar, A.S.

doi:10.1109/isape.2008.4735132

Cited by 7 publications

(4 citation statements)

References 2 publications

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“…Thus the inherent focusing nature of a dielectric lens has a similar effect on the image resolution as focusing by means of synthetic aperture radar. A comparison of a dielectric lens and SAR technique for Ka-band (26-40 GHz) is presented in [9].…”

Section: Methodsmentioning

confidence: 99%

Radar Signatures of Complex Buried Objects in Ground Penetrating Radar

Panzner¹,

Jostingmeier²,

Omar³

2011

International Journal of Electronics and Telecommunications

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Radar Signatures of Complex Buried Objects in Ground Penetrating RadarThe evaluation of radar signatures of buried objects for three experimental ground penetrating radar setups will be addressed in this paper. The contribution will present corresponding results and experiences. The performance of the imaging capabilities of the designed radar system will be assessed by reconstruction of complex shaped test objects, which have been placed within the ground. The influence of system parameters of the ground penetrating radar have been varied systematically in order to analyze their effects on the image quality. Among the modified parameters are the step size in transverse plane, height of the antenna over ground, frequency range, frequency points, antennas and varying instrument settings. A signal processing technique based on synthetic aperture radar has been applied on the measured raw data. The focus radius around a specific target has been analyzed concerning the compromise between image quality and processing time. The experiments demonstrate that the designed ground penetrating radar systems are capable for detection of buried objects with high resolution.

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Section: Methodsmentioning

confidence: 99%

Radar Signatures of Complex Buried Objects in Ground Penetrating Radar

Panzner¹,

Jostingmeier²,

Omar³

2011

International Journal of Electronics and Telecommunications

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“…The simplicity of being integrated into the system and low profile are the other advantages of flat lenses [11]- [12]. The presented lens in this paper is also totally dielectric and no metallic layers are included, hence ohmic losses and mutual coupling would be predicted lower and subsequently, no surface current would be generated in the lens [15]. In this regard, a comparison between various methods which have been implemented in hyperthermia application and the proposed lens in this paper is presented in Table 1.…”

Section: Introductionmentioning

confidence: 99%

Design of Wideband Dielectric Near-Field Lens for Medical Applications in Tumor Treatment

Haghshenas-Kashani

Damavandi

Khalaj‐Amirhosseini

2022

Engineering Science & Technology

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This paper presents a dielectric near-field lens for hyperthermia applications in tumor cell destruction, unlike the previous methods that used microstrip near-field lenses. Dielectric lenses benefit from operating in a wideband frequency range, low profile, and no surface current generated on them. The proposed dielectric lens is divided into 13 symmetric regions and each region comprises exclusive dielectric constants that contribute to microwave energy aggregation in the tumor area. The microwave energy accumulation leads to tumor cell destruction after therapeutic purpose temperature elevation during a defined time. The proposed near-field lens is designed for both superficial and deep-seated tumors. Specific Absorption Rate (SAR) and Effective Treatment Area (ETA) principles are used to analyze the lens effect on electromagnetic wave distribution on the phantom simulated human body. Based on the achieved SAR and ETA distribution on the biological phantom at 2.4 GHz, the proposed lens for superficial tumors demonstrated effective performance in focusing electromagnetic waves on the desired focal point.

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“…The traditional dielectric lens is usually adopted in the design of the focused antenna, and Teflon is mostly used as the lens material. The ray-optics theory is used to write an equation describing the lens profile, that is, the optical path from the feed to each point on the lens surface must be equal [2]- [5]. For example, in [2], a focused lens horn antenna with different spread angle has been studied.…”

Section: Introductionmentioning

confidence: 99%

Dual-Band Focused Transmitarray Antenna for Microwave Measurements

Zhang

Sun

et al. 2020

IEEE Access

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A dual-band focused transmitarray antenna designed by using frequency selective surfaces (FSS) technique is proposed in this paper. Compared with the traditional transmitarray antenna, the proposed antenna has advantages of good ability to focus electromagnetic wave in the dual-band, high resistant of poor measurement environment and easy to process. The transmitarray consists of four identical metal phase shift layers, each of which is separated by an air gap. The elements distributed on metal layer are composed of a I-shaped slot at the center and four L-shaped slots with central symmetry. The change of I-shaped slot length affects the change of phase in low frequency band and the change of L-shaped slot length affects the change of phase in high frequency band. The mutual coupling between the two kinds of slots can be neglected. The proposed antenna consisting of a transmitarray and a feed has been analysed, simulated, and measured. The results show that the average focal spot diameter (SD) is 35.2 mm at 12 GHz and 24.5 mm at 18 GHz, and the dual-band focused transmitarray antenna can operate in two frequency bands 11.8-12.2 and 17.8-18.1 GHz. Simulated and measured results show that the proposed antenna has good concordance, making it possible for various microwave measurements. INDEX TERMS Focused; all metal elements; dual-band; transmitarray antenna; frequency selective surfaces (FSS).

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K<inf>a</inf>-Band dielectric lens antenna for resolution enhancement of a GPR

Cited by 7 publications

References 2 publications

Radar Signatures of Complex Buried Objects in Ground Penetrating Radar

Radar Signatures of Complex Buried Objects in Ground Penetrating Radar

Design of Wideband Dielectric Near-Field Lens for Medical Applications in Tumor Treatment

Dual-Band Focused Transmitarray Antenna for Microwave Measurements

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