Cross‐Vivaldi antenna for breast tumor detection

Zhang, Jingjing; Fear, Elise C.; Johnston, R.H.

doi:10.1002/mop.24037

Cited by 41 publications

(22 citation statements)

References 8 publications

(11 reference statements)

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“…Several techniques have been introduced to obtain the high gain and directive characteristics of microstrip antenna, such as unit cell antenna [1], cross-Vivaldi antenna [2], compact metamaterial antenna [3] and slot antenna [4], incorporating electromagnetic band gap (EBG) structures [5], etc. This makes the antennas suitable for microwave imaging systems for breast measurements.…”

Section: Introductionmentioning

confidence: 99%

A Negative Index Metamaterial to Enhance the Performance of Miniaturized UWB Antenna for Microwave Imaging Applications

et al. 2017

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Abstract:A new, compact planar wideband negative index metamaterial based on a modified split ring resonator (SRR) is studied to enhance performance of ultrawideband antenna. A compact, metamaterial (MTM)-inspired microstrip antenna is presented for microwave imaging system (MIS) application. Two layers of left-handed metamaterial array (2 × 4) of the unit cell are placed on the radiating patch and the ground plane, respectively. Each left-handed metamaterial (LHM) unit cell was constructed by modifying a square split ring resonator (SRR), resulting in negative permeability and permittivity with a stable negative refractive index. The results shows that it has a significant impact on the performance of conventional patch antenna in terms of transmission co-efficient, efficiency and low loss. Compared to antenna without LHM, it is shown that the bandwidth is significantly broadened up to a few megahertz and becomes more convergent leading to the achievement of desired properties for ultra-wideband (UWB) applications leading to microwave imaging. The proposed MTM antenna structure is fabricated on commercially-available, flame-retardant material of size 26 × 22 × 1.6 mm 3 with 4.6 dielectric constants, due to its low cost and convenience for making multilayer printed circuit boards (PCBs). The antenna achieves 3.1 GHz to 10.71 GHz of impedance bandwidth (−10 dB), which covers the full UWB band. The use of double-layer negative index MTM unit cells enhances UWB performance, and the improved radiation efficiency, nearly directional radiation pattern, acceptable gain, stable surface current and negative refractive index make this MTM antenna a suitable candidate for UWB applications.

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Section: Introductionmentioning

confidence: 99%

A Negative Index Metamaterial to Enhance the Performance of Miniaturized UWB Antenna for Microwave Imaging Applications

et al. 2017

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“…Another way to implement a wideband dual polarized antenna is to orientate two Vivaldi antennas into a cross-shape with respect to the antenna center where a galvanic contact is avoided by a small longitudinal gap between antenna elements [23][24][25]. Dual fed Vivaldi antennas do not exist.…”

Section: Introductionmentioning

confidence: 99%

Dual Polarized Dual Fed Vivaldi Antenna for Cellular Base Station Operating at 1.7–2.7 GHz

Sonkki

Myllymäki

Putaala

et al. 2017

International Journal of Antennas and Propagation

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The paper presents a novel dual polarized dual fed Vivaldi antenna structure for 1.7-2.7 GHz cellular bands. The radiating element is designed for a base station antenna array with high antenna performance criteria. One radiating element contains two parallel dual fed Vivaldi antennas for one polarization with 65 mm separation. Both Vivaldi antennas for one polarization are excited symmetrically. This means that the amplitudes for both antennas are equal, and the phase difference is zero. The orthogonal polarization is implemented in the same way. The dual polarized dual fed Vivaldi is positioned 15 mm ahead from the reflector to improve directivity. The antenna is designed for −14 dB impedance bandwidth (1.7-2.7 GHz) with better than 25 dB isolation between the antenna ports. The measured total efficiency is better than −0.625 dB (87%) and the antenna presents a flat, approximately 8.5 dB, gain in the direction of boresight over the operating bandwidth whose characteristics promote it among the best antennas in the field. Additionally, the measured cross polarization discrimination (XPD) is between 15 and 30 dB and the 3 dB beamwidth varies between 68 ∘ and 75 ∘ depending on the studied frequency.

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“…For example, the use of cross-polarized antennas [5], [6] has been examined as a means of increasing sensitivity in radar-based breast cancer screening systems. Among breast imaging arrays designed for microwave inverse scattering, some use vertically oriented monopole antennas [7] while others use horizontally oriented monopoles [8].…”

Section: Introductionmentioning

confidence: 99%

A TSVD Analysis of the Impact of Polarization on Microwave Breast Imaging Using an Enclosed Array of Miniaturized Patch Antennas

Mays

Behdad

Hagness

2015

Antennas Wirel. Propag. Lett.

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Microwave breast imaging performance is fundamentally dependent on the quality of information contained within the scattering data. We apply a truncated singular-value decomposition (TSVD) method to evaluate the information contained in a simulated scattering scenario wherein a compact, shielded array of miniaturized patch antennas surrounds an anatomically realistic numerical breast phantom. In particular, we investigate the impact of different antenna orientations (and thus polarizations), namely two array configurations with uniform antenna orientations and one mixed-orientation array configuration. The latter case is of interest because it may offer greater flexibility in antenna and array design. The results of this analysis indicate that mixed-polarization configurations do not degrade information quality compared to uniform-polarization configurations and in fact may enhance imaging performance, and thus represent viable design options for microwave breast imaging systems.

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Cross‐Vivaldi antenna for breast tumor detection

Cited by 41 publications

References 8 publications

A Negative Index Metamaterial to Enhance the Performance of Miniaturized UWB Antenna for Microwave Imaging Applications

A Negative Index Metamaterial to Enhance the Performance of Miniaturized UWB Antenna for Microwave Imaging Applications

Dual Polarized Dual Fed Vivaldi Antenna for Cellular Base Station Operating at 1.7–2.7 GHz

A TSVD Analysis of the Impact of Polarization on Microwave Breast Imaging Using an Enclosed Array of Miniaturized Patch Antennas

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