Development of Microstrip Patch Antenna for Indirect Microwave Holographic System

Kumari, Vineeta; Ahmed, Aijaz; Sheoran, Gyanendra; Kanumuri, Tirupathiraju

doi:10.1109/imarc.2018.8877342

Cited by 7 publications

(9 citation statements)

References 5 publications

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“…Previously, we proposed the use of microstrip patch antenna for receiving the scattered wave‐fields in the indirect holographic setup with a horn antenna as transmitter . Although the results were in good agreement with the original scanned objects but it was limited due to its low directivity and narrow band range of operations.…”

Section: Introductionmentioning

confidence: 87%

Indirect microwave holography with resolution enhancement in metallic imaging

Kumari

Ahmed

Sheoran

et al. 2020

Int J RF Microw Comput Aided Eng

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In this work, a compact indirect microwave holographic setup is proposed and developed by utilizing the low cost, specifically designed directive antennae as transmitter and receiver. Microwave holograms are recorded while scanning the 2D plane using (x-y) motorized translation stage. The recorded holograms are then reconstructed numerically employing the angular spectrum diffraction phenomenon. The quality of the reconstructed amplitude image is further enhanced through the deep neural network, in order to combat with the low resolution of reconstructed images. The quantitative and qualitative results exploit the possibility of developing the miniaturized indirect microwave holographic system for near field applications. K E Y W O R D Sangular spectrum, diffraction, holograms, holography, imaging, interference, ultra wide band antenna

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Section: Introductionmentioning

confidence: 87%

Indirect microwave holography with resolution enhancement in metallic imaging

Kumari

Ahmed

Sheoran

et al. 2020

Int J RF Microw Comput Aided Eng

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“…Also, in microwave holography phase acquisition is an expensive and tedious task. Either the phase is acquired directly utilizing vector measurements 3‐7 or characterization of unknown phase is done by interference of object and reference wave as scalar measurements 8‐10 . The scalar measurements are employed in indirect microwave holography.…”

Section: Introductionmentioning

confidence: 99%

“…The phase step of π/2 is chosen as it provides the minimum error of retrieved object field for fixed tolerance values 13 . The combined phase shifted hologram is reconstructed using the angular spectrum diffraction method 9 . In addition, a methodology has been employed to quantify the accuracy of the procedure in the presence of unrecognized phase errors due to measurement inaccuracies.…”

Section: Introductionmentioning

confidence: 99%

Numerical four phase shifting microwave holography with phase step error analysis

Kumari

Barak

Sheoran

2021

Int J RF Microw Comput Aided Eng

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Microwave holography utilizes an antenna to record the hologram. In a phase shifting microwave holographic method, the antenna has to perform the 2D scanning over an area corresponding to each phase shift in reference wave. Since this methodology requires phase shifting in each scan, this makes the process lengthy and laborious. In this work, a numerical 4‐step phase shifting method is presented for generating the microwave hologram, in which a single (0° phase) hologram is recorded experimentally and the other three holograms are generated numerically by shifting the phase in reference wave. The amplitude and phase information of object is extracted using angular spectrum diffraction method. An error introduced by various components in experiments is calculated and corrected to enhance the accuracy of reconstructed phase values. The calculated phase step error for the experiment is 0.0501 rad. The quantitative and qualitative results along with the experimental phase shifting phase results are shown to envision the applications of numerical phase shifting microwave holography in imaging of metallic objects and highly scattered biological phantom.

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“…The tumor size was defined as 4cm in diameter, which motivates the authors to refine the technique utilizing directive and small size antennas and considering a more realistic breast phantom along with the inclusion of a varying shape and sizes of tumors. Initial results using microstrip and directive antennas for the near field indirect holographic system have been reported by the authors in [10,11] for imaging of metallic objects.…”

Section: Introductionmentioning

confidence: 99%