Novel circularly polarized dielectric resonator antenna for microwave image sensing application

Singhwal, Sumer Singh; Kanaujia, Binod Kumar; Singh, Ajit; Kishor, Jugul

doi:10.1002/mop.31830

Cited by 21 publications

(13 citation statements)

References 16 publications

(18 reference statements)

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“…Moreover, this design results in a narrower 3 dB ARBW of 3.9%. Circular polarization is achieved by employing a feeding technique that consists of a circular microstrip line with four open stubs in [12]. The design has a large feed footprint, comparable −10 dB IBW, and a narrow 3 dB ARBW of 2.92%, but a higher CP gain of 8.6 dBic than the proposed design.…”

Section: Measured Resultsmentioning

confidence: 99%

“…In [15], a complex cylindrical stair shape of the DR is adapted that obtains a wider −10 dB IBW and 3 dB ARBW and lower CP gain as compared to the proposed design. Moreover, unlike the geometries in [7], [10]- [12], and [15], the proposed structure is simple, compact, and uses Nylon screws to hold the DR firmly to the ground, thereby making it resistant to flickering.…”

Section: Measured Resultsmentioning

confidence: 99%

“…In another study [10], circular polarization is obtained by off-centered feeding of an annular slot. Different feeding structures are used to excite the orthogonal modes in the DR. A conformal spiral wire [11] was also printed onto a hemispherical DR to excite orthogonal modes while a circular ring microstrip line with four open stubs [12] was used to excite TE 11 mode in the DR. In additional work [13]- [14], several parasitic elements were added to the DR to form a CP DRA.…”

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confidence: 99%

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Circularly Polarized Dielectric Resonator Antenna With Two Annular Vias

et al. 2021

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In this paper, a new technique for circular polarization in a slot coupled dielectric resonator antenna is proposed. The circular polarization is generated by inserting the two annular vias into dielectric resonator slightly off the diagonal position. In addition to the circular polarization, the proposed technique increases the total realized gain by 1.62 dB as compared to the via-less case on the account of increased directivity while maintaining the same aspect ratio of the DR. To validate the design, a prototype is fabricated and measured. The measured results show that the proposed circularly polarized dielectric resonator antenna has a-10 dB reflection bandwidth of 7.29% (3.3-3.55 GHz) and a 3 dB axial ratio bandwidth of 5.5% (3.28-3.465 GHz) with a measured RHCP gain of 6-7.1 dBic. The measured curves of the S 11 , axial ratio, and the RHCP gain results are in good agreement with the simulated results. INDEX TERMS Axial ratio, circular polarization, rectangular dielectric resonator antenna, right-handed circular polarization I. INTRODUCTION

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Section: Measured Resultsmentioning

confidence: 99%

Section: Measured Resultsmentioning

confidence: 99%

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confidence: 99%

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Circularly Polarized Dielectric Resonator Antenna With Two Annular Vias

et al. 2021

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“…It is concluded that most of the existing DRA structures used for RBMI are multistatic (use of more than one antenna for tumor detection) and are bigger in size 22,23 . Many of the investigators did not authenticate their method experimentally using mimic of female breast 24,25 . The proposed monostatic method implicates the usage of a UWB antenna for S 11 parameter as associated to other wideband DRAs and microstrip patch antennas for RBMI 16,23‐25 .…”

Section: Microwave Imaging Of the Breast Phantom With Tumor Using Beamentioning

confidence: 98%

“…22,23 Many of the investigators did not authenticate their method experimentally using mimic of female breast. 24,25 The proposed monostatic method implicates the usage of a UWB antenna for microstrip patch antennas for RBMI. 16,[23][24][25] This concludes that the breast cancer detection using proposed antenna is efficient than the existing research in the field of biomedical applications.…”

Section: Delay Multiply and Summentioning

confidence: 99%

Monostatic radar‐based microwave imaging of breast tumor detection using a compact cubical dielectric resonator antenna

Kaur

2020

Micro & Optical Tech Letters

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This research article presents a proficient, convenient, and low-cost monostatic radar-based microwave imaging (RBMI) technique for the breast tumor detection. For this, a compact cubical dielectric resonator antenna (DRA) with impedance bandwidth of 8.3 GHz (ie, 4.3-12.6 GHz) has been simulated using CST V 0 17. In proposed monostatic RBMI technique, the designed DRA is placed parallel to the breast phantom and rotated around it at an interval of 10 in elevation plane (0-π) and azimuthal plane (0-2π), respectively; first, without and then with tumor inside the breast phantom. Total 1080 back-scattered signals are recorded for the entire impedance bandwidth, and processed for microwave imaging. For the validation of results, fabricated antenna is rotated around the artificial breast mimic. The artificial breast mimic is made up from gelatin (skin), petroleum jelly (fat), and wheat flour (tumor). The backscattered signals from the artificial breast phantom have been recorded on the vector network analyzer model no. E5063A for both the cases that is, with absence and presence of tumor at different position and time intervals. The recorded S-parameters have been processed in two beam-forming algorithms; delay and sum (DAS), delay multiply and sum (DMAS). These signals are then converted into digital data and processed in the MATLAB, to visualize the 2D image of the scanned area to detect the breast tumor. By comparing the reconstructed images, it is concluded that the DAS algorithm provides just a clue about the presence of the tumor, but DMAS provides the accurate position and size of the breast tumor.

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Design and analysis of a super compact UWB antenna for accurate detection of breast tumors using monostatic radar‐based microwave imaging technique

Grover

Singh

Sahu

2023

Int J Imaging Syst Tech

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This article proposes a low‐profile ultra‐wideband (UWB) antenna for breast tumor detection using the monostatic radar‐based microwave imaging (RBMI) technique. The proposed UWB antenna consists of a circular patch and ground plane along with a modified tapered feed line having a total size of 13 × 9 × 1.6 mm3. The designed antenna operates from 4 to 11 GHz based on a −10 dB reflection coefficient with a peak gain of 9.5 dBi at 4.8 GHz. Experimental validation is carried out after fabricating the prototype of the UWB antenna and the breast mimic. The measured backscattered signals are captured using the vector network analyzer (E‐5063A) by keeping the antenna at 10 mm from the breast phantom. After that, post‐processing of the measured data is done to detect the exact depth and location of the malignant tissue. The proposed antenna uses UWB band frequency of operation because it has some unique features, that is, it provides immunity to multipath fading, has a simple design, has a low cost of fabrication, and has biological friendliness. Moreover, due to the proposed antenna's resonance at a lower resonant frequency better depth of penetration is achieved in human body phantoms and the proposed antenna provides specific absorption rates (SAR) of 0.877 W/kg over 1 g of tissue at 4.8 GHz, which is an acceptable limit for SAR as per FCC guidelines. Therefore, the proposed antenna and monostatic RBMI technique are good candidates for breast tumor detection.

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Novel circularly polarized dielectric resonator antenna for microwave image sensing application

Cited by 21 publications

References 16 publications

Circularly Polarized Dielectric Resonator Antenna With Two Annular Vias

Circularly Polarized Dielectric Resonator Antenna With Two Annular Vias

Monostatic radar‐based microwave imaging of breast tumor detection using a compact cubical dielectric resonator antenna

Design and analysis of a super compact UWB antenna for accurate detection of breast tumors using monostatic radar‐based microwave imaging technique

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