A Novel Spherical-Wave Three-Dimensional Imaging Algorithm for Microwave Cylindrical Scanning Geometries

Tan, Weixian; Hong, Wen; Wang, Yanping; Wu, and Yirong

doi:10.2528/pier10100307

Cited by 47 publications

(46 citation statements)

References 22 publications

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“…Finally, we compare the resonating modes between QOBR and QOBGR at SubMM-wavelengths. The Bessel-Gauss beam generated from the designed QOBGR have many promising applications in the MM-and SubMM-wavelength range, such as power transfer [26], millimeter wave imaging [27][28][29] and medium parameter measurement [30]. These applications are being studied at present.…”

Section: Discussionmentioning

confidence: 99%

Investigation of Quasi-Optical Bessel-Gauss Resonator at Mm- And Submm-Wavelengths

Yu¹,

Dou²

2013

PIER

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Abstract-A research of a quasi-optical Bessel-Gauss resonator (QOBGR) at millimeter (MM) and submillimeter (SubMM) wavebands is presented in this paper. The design is based on the quasioptical theory and technique. The iterative Stratton-Chu formula (ISCF) algorithm is employed to analyze the output characteristics of the cavity, including the resonant modes, phases, power losses and phase shifts. Analysis of the results demonstrates that the present design of the QOBGR can support zero order or any high order mode of the pseudo Bessel-Gauss beam. At the output plane the intensity distributions of these modes are modulated by a Gauss-shaped envelope, and their phase patterns have an approximate block-like profile. Tolerance analysis for the designed QOBGR is also done. Lastly, a comparison of resonating modes is made between QOBR (quasi-optical Bessel resonator) and QOBGR when both are configured with the same geometric parameters.

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Section: Discussionmentioning

confidence: 99%

Investigation of Quasi-Optical Bessel-Gauss Resonator at Mm- And Submm-Wavelengths

Yu¹,

Dou²

2013

PIER

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“…This leads to the ultrasound imaging can not provide a high contrast in early breast cancer detection. Therefore, there has been a great deal of interests in new breast cancer detection techniques in recent years [4][5][6][7][8][9][10]. Microwave imaging has been researched in early breast cancer detection in [4].…”

Section: Introductionmentioning

confidence: 99%

“…It takes the advantage of high contrast in the dielectric properties between malignant and normal tissues for microwave frequency spectrum. However, it has the drawback of low spatial resolution due to the relatively long wavelength [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

An Integrated Simulation Approach and Experimental Research on Microwave Induced Thermo-Acoustic Tomography System

Song¹,

Zhao²,

Wang³

et al. 2013

PIER

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Abstract-Microwave induced thermo-acoustic tomography (MI-TAT) has great potential in early breast cancer detection because it utilizes the advantages of both microwave imaging and ultrasound imaging. In this paper, a fast and efficient simulation approach based on a hybrid method which combines finite integration time domain (FITD) method and pseudo-spectral time domain (PSTD) method is developed. By using this approach, energy deposition of biology tissue illuminated by electromagnetic fields can be accurately simulated. Meanwhile, acoustic properties of the tissue can be efficiently simulated as well. Based on this approach, a MITAT model is created and some simulated results are analyzed. Furthermore, some real breast tissues are adopted to perform the thermo-acoustic imaging experiment. Comparisons between experimental and simulated results are made. The feasibility and effectiveness of the proposed approach are demonstrated by both numerical simulations and experimental results.

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“…Synthetic aperture radar (SAR) is the main means of microwave imaging and many aperture synthetic modes have been proposed [13][14][15][16]. Circular SAR (CSAR) is a special aperture synthetic mode [12,[16][17][18].…”

Section: Introductionmentioning

confidence: 99%

A Near-Field 3d Circular Sar Imaging Technique Based on Spherical Wave Decomposition

Zhang¹,

Pi²,

Min³

2013

PIER

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Abstract-A near-field three dimensional imaging algorithm for circular SAR is proposed in this paper. It adopts the theory of spherical wave decomposition to transform Green function to a superposition of plane wave components. Using this relation, the image-reconstruction can be implemented in frequency domain instead of in spatial domain, which simplifies the solving process of target reflectivity function, and allows for the target to be near to the radar. Through compensating phase factor and filtering at each elevation, we firstly get the ground CSAR signal of each elevation in frequency domain. Then, performing two dimensional inverse nonuniform fast Fourier transform and accumulating the results of all azimuth angles, the reconstructed two dimensional image corresponding to an elevation is achieved. Finally, using reconstructed image datum of all elevation, the three dimensional image of target is obtained. To demonstrate the imaging performance of our method, numerical simulations and experiments are conducted. By comparing the results with the focusing operator algorithm and the back-projection algorithm, it is found that the proposed algorithm is more efficient and can obtain a good imaging performance.

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A Novel Spherical-Wave Three-Dimensional Imaging Algorithm for Microwave Cylindrical Scanning Geometries

Cited by 47 publications

References 22 publications

Investigation of Quasi-Optical Bessel-Gauss Resonator at Mm- And Submm-Wavelengths

Investigation of Quasi-Optical Bessel-Gauss Resonator at Mm- And Submm-Wavelengths

An Integrated Simulation Approach and Experimental Research on Microwave Induced Thermo-Acoustic Tomography System

A Near-Field 3d Circular Sar Imaging Technique Based on Spherical Wave Decomposition

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