A Novel Cavity Backed Monopole Antenna With Uwb Unidirectional Radiation

Edalati, Arezou; Shao, Wenbo; McCollough, Todd R.; McCollough, and William

doi:10.2528/pierc16121610

Cited by 17 publications

(13 citation statements)

References 26 publications

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“…The main body of the measurement system is made of polyvinyl chloride and wood to produce the low environmental reflection. More information about this antenna can be found in [19] and the entire measurement system in [20] and [21]. The object under test was hung in a plastic graduated cylinder (PGC) filled with glycerin.…”

Section: Methodsmentioning

confidence: 99%

A Phase Shift and Sum Method for UWB Radar Imaging in Dispersive Media

Shao

McCollough

McCollough³

2019

IEEE Trans. Microwave Theory Techn.

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A phase shift and sum (PSAS) algorithm to image objects in dispersive media is presented. The algorithm compensates the phase shift of the scattered field from the receiver to the source for each frequency component in an ultrawideband (UWB) and then integrates all the frequency responses. This method resolves the multispeed and multipath issue when UWB signals propagate in dispersive media. In addition, a multipath effect due to refraction on a curved boundary is also explored. By collecting data using a customized microwave measurement system of two different objects placed in a plastic graduated cylinder filled with glycerin, along the measured dielectric parameters of glycerin (a dispersive medium), highquality reconstructed images are formed using PSAS. Quantitative and qualitative comparisons with two other traditional time-shift radar-based microwave imaging algorithms for the same objects under test demonstrate the advantages of PSAS.Index Terms-Dispersive media, microwave imaging, microwave measurement, radar-based method, ultra-wideband (UWB).

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Section: Methodsmentioning

confidence: 99%

A Phase Shift and Sum Method for UWB Radar Imaging in Dispersive Media

Shao

McCollough

McCollough³

2019

IEEE Trans. Microwave Theory Techn.

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“…UWB patch monopole antennas have been utilized for many MWI applications . UDR, high gain, and extensive bandwidth of UWB antenna are required in designing MWI baggage scanner system.…”

Section: Introductionmentioning

confidence: 99%

“…To begin with, a patch monopole antenna was presented with a cavity back to generate UDRs for MWI application. The printed patch monopole antennas were presented with metallic reflectors to make the antenna radiate in UDRs. Nonetheless, these reports did not deal with the whole UWB bandwidth, despite the use of high dielectric constant ( ε r = 9.8) .…”

Section: Introductionmentioning

confidence: 99%

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High gain CPW‐fed UWB planar monopole antenna‐based compact uniplanar frequency selective surface for microwave imaging

Abdulhasan

Alias

Ramli

et al. 2019

Int J RF Microw Comput Aided Eng

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In this article, a novel uniplanar ultra‐wideband (UWB) stop frequency selective surface (FSS) was miniaturized to maximize the gain of a compact UWB monopole antenna for microwave imaging applications. The single‐plane FSS unit cell size was only 0.095λ × 0.095λ for a lower‐operating frequency had been introduced, which was miniaturized by combining a square‐loop with a cross‐dipole on FR4 substrate. The proposed hexagonal antenna was printed on FR4 substrate with coplanar waveguide feed, which was further backed at 21.6 mm by 3 × 3 FSS array. The unit cell was modeled with an equivalent circuit, while the measured characteristics of fabricated FSS array and the antenna prototypes were validated with the simulation outcomes. The FSS displayed transmission magnitude below −10 dB and linear reflection phase over the bandwidth of 2.6 to 11.1 GHz. The proposed antenna prototype achieved excellent gain improvement about 3.5 dBi, unidirectional radiation, and bandwidth of 3.8 to 10.6 GHz. Exceptional agreements were observed between the simulation and the measured outcomes. Hence, a new UWB baggage scanner system was developed to assess the short distance imaging of simulated small metallic objects in handbag model. The system based on the proposed antenna displayed a higher resolution image than the antenna without FSS.

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“…In this work, our focus is to design a novel, low-cost and miniaturised antenna to be utilised in a UWB biomedical application. We have utilised the techniques mentioned in previously reported works [6][7][8][9][10][11][12][13][14][15] to design a low-cost and smallsize UWB antenna for the desired application. Here, a double circular ring antenna is proposed which gives good results in terms of size, bandwidth, gain, and radiation pattern as compared to existing designs in [10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Double circular ring compact antenna for ultra‐wideband applications

Khan

Razzaq

Iqbal

et al. 2018

IET Microwaves, Antennas & Propagation

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A simple, low‐cost and compact antenna is presented for ultra‐wideband applications. The proposed antenna design has improved characteristics as compared to the available different designs reported in the recent literature. The antenna is designed on FR4 substrate with microstrip feed line. Better results are obtained by optimising the geometrical parameters of patch and the lengths of ground and strip line. According to the criteria of −10 dB matching bandwidth, the designed antenna covers a high bandwidth ranging from 3.1 to 16 GHz. It was identified that the voltage to standing wave ratio is less than 2 which is also the desired characteristic for matching of an efficient antenna. The maximum dimension of this antenna is smaller than 0.27λ0 at the lowest frequency of operation, where λ0 is the free space wavelength. Further, low‐cost, smaller size and simple design of the proposed antenna makes it very suitable for biomedical applications.

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A Novel Cavity Backed Monopole Antenna With Uwb Unidirectional Radiation

Cited by 17 publications

References 26 publications

A Phase Shift and Sum Method for UWB Radar Imaging in Dispersive Media

A Phase Shift and Sum Method for UWB Radar Imaging in Dispersive Media

High gain CPW‐fed UWB planar monopole antenna‐based compact uniplanar frequency selective surface for microwave imaging

Double circular ring compact antenna for ultra‐wideband applications

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