Research on a Novel Miniaturized Antipodal Vivaldi Antenna With Improved Radiation

Teni, Geer; Zhang, Ning; Qiu, Jinghui; Zhang, Pengyu

doi:10.1109/lawp.2013.2253592

Cited by 143 publications

(96 citation statements)

References 15 publications

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“…Two approaches were presented to detect tumors without the need of breast background information. The approaches exploit the effect of tumor on S 11 and S 21 at specific frequency bands. The antenna was used to detect tumors in different breast phantom structures including multi-layer composite phantom.…”

Section: Discussionmentioning

confidence: 99%

“…Here the antenna was covered by dielectric layers to protect it from the coupling liquid. In 2013, another antipodal Vivaldi antenna was proposed to improve the radiation patterns and gain at higher frequencies, where the lens and the choke slot edges configuration were loaded at the termination of the flares [11]. Chen et al [12] proposed a broadband artificial material that acted as a lens for beam focusing and was composed of non-resonant parallel-line unit cells to improve the gain of an antipodal TSA.…”

Section: Introductionmentioning

confidence: 99%

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Simulation Design and Testing of a Dielectric Embedded Tapered Slot Uwb Antenna for Breast Cancer Detection

Al-Zuhairi¹,

Gahl²,

Al-Azzawi³

et al. 2017

PIER C

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Abstract-A distortion-less ultra-wideband tapered slot antenna is designed to achieve wide band impedance matching and high gain without requiring coupling liquids. The antenna is embedded in a suitable dielectric material for compact size and performance improvement. The near-field test is simulated by placing several field probes near the antenna to plot the radiation pattern and polarization isolation. The antenna exhibits a highly directive pattern and polarization isolation in near field. The time domain antenna distortion is tested by calculating the fidelity and group delay. The results show low distortion and also show the importance of covering the antenna by dielectric layers for bandwidth increment and distortion reduction. To evaluate the antenna performance in breast cancer detection, three breast phantoms are imaged by using the raster scan imaging method. Two approaches are proposed to detect tumors without the need of breast background data. The approaches based on the effect of the tumor on transmission and reflection parameters on the frequency band allowed for medical applications. The obtained images show the antenna to be a strong candidate for breast imaging as well as in tumor detection for different scenarios that include complex multi-layer phantom and small tumor.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simulation Design and Testing of a Dielectric Embedded Tapered Slot Uwb Antenna for Breast Cancer Detection

Al-Zuhairi¹,

Gahl²,

Al-Azzawi³

et al. 2017

PIER C

View full text Add to dashboard Cite

show abstract

“…The measured impedance bandwidth of the proposed antenna, defined by |S 11 | < −10 dB, ranges from 3 to 12.8 GHz, which covers the entire UWB frequency band. The size of the proposed antenna is smaller than the antennas in [7,8,14].…”

Section: Introductionmentioning

confidence: 98%

“…A modified Vivaldi antenna based on regular slot edge (RSE), loaded lens and choke slot structures is presented in [7]. The low-end operating frequency is extended to lower frequency band, and the radiation patterns at the high frequencies are improved.…”

Section: Introductionmentioning

confidence: 99%

A Printed Vivaldi Antenna With Improved Radiation Patterns by Using Two Pairs of Eye-Shaped Slots for Uwb Applications

Ma¹,

Zhao²,

Wu³

et al. 2014

PIER

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Abstract-In this paper, a printed Vivaldi antenna with two pairs of eye-shaped slots is proposed for UWB applications. By using two pairs of eye-shaped slots, the side lobe levels of the radiation pattern are reduced, and the antenna gain is improved at low frequencies. To illustrate the effectiveness of the proposed design, a prototype of the proposed antenna is fabricated and measured. Experimental results show that the proposed antenna presents a measured impedance bandwidth, defined by |S 11 | < −10 dB, from 3 to 12.8 GHz with a compact size (36 mm × 36 mm). Good unidirectional radiation characteristics with a front-to-back ratio better than 10 dB are also achieved. The measured gain is better than 3.7 dBi in the operating frequency band. In addition, the measured group delay of the proposed antenna is around 1.2 ns with a variation less than ±0.5 ns.

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“…The coplanar lens produced by substrate end shaping technique, director made of a profiled dielectric piece with higher permittivity, hemisphere lens placed in front of the antenna, and metal director formed by parasitic patch have been proposed to produce directed radiation pattern and enhance antenna gain [5][6][7][8][9][10][11]. The corrugation edge technique is proposed to improve radiation features of lower frequencies [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Dielectric Sheets Covered Broadband Vivaldi Antenna for Gain Enhancement

Li¹,

Pang²,

Wang³

et al. 2017

PIER C

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Abstract-To enhance the gain of conventional Vivaldi antenna (CVA), a novel dielectric sheets-covered Vivaldi antenna (DSCVA) is proposed. The dielectric sheets suck energy from the tapered slot region and flare termination region of the CVA, and thus act as surface wave antennas to improve end-fire performances. The CVA, DSCVA as well as the DSCVA with elongated tapered profile (SP-DSCVA) are designed, fabricated and measured. The simulation results are in good agreement with the experimental data. Measurement results show that the gain increase of the DSCVA is up to 5.1 dBi in the range of 3.5-16.5 GHz without increasing antenna length compared to the CVA. More gain enhancement is achieved for the SP-DSCVA. In addition, the half power beamwidths of the CVA as well as the sidelobe levels are improved in both E-and H-planes.

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Research on a Novel Miniaturized Antipodal Vivaldi Antenna With Improved Radiation

Cited by 143 publications

References 15 publications

Simulation Design and Testing of a Dielectric Embedded Tapered Slot Uwb Antenna for Breast Cancer Detection

Simulation Design and Testing of a Dielectric Embedded Tapered Slot Uwb Antenna for Breast Cancer Detection

A Printed Vivaldi Antenna With Improved Radiation Patterns by Using Two Pairs of Eye-Shaped Slots for Uwb Applications

Dielectric Sheets Covered Broadband Vivaldi Antenna for Gain Enhancement

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