Abstract
This study proposes a new parasitic resonator-based diamond-shaped microstrip patch antenna for ultra-wideband microwave imaging applications. The antenna consists of a diamond-shaped radiating patch, partial ground plane, and four-star shape parasitic elements. The use of parasitic elements improves the antenna performance in terms of the bandwidth and gain. The proposed prototype has a compact dimension of 30 × 25 × 1.6 mm3. The antenna achieves an overall bandwidth (S11<-10dB) of 7.6 GHz (2.7–10.3 GHz) with more than 4 dBi realized gain and 80% efficiency across the radiating bandwidth. The modified structures of the design extended the usable upper frequency from 9.7 GHz to 10.3 GHz, and the lower frequency is decreased from 3.4 GHz to 2.7 GHz with maintaining the omnidirectional radiation pattern. The design and simulation of the antenna are performed in the 3D electromagnetic simulator CST Microwave Studio. The proposed antenna is used for breast phantom measurement system to analyze the variation of backscattering signal and transmit-received pulses. The observation during the analysis of the numerical and measured data reveals that the designed antenna is a suitable candidate for ultra-wideband (UWB)-based microwave imaging applications.
Highlights
In microwave imaging (MWI), the radiating backscattered signals from the target region of the human body are collected and analyzed to retrieve the changes of electrical properties inside the tissues
In a MWI system, microstrip antennas are acting as a transceiver
Two different categories of antennas are mostly used in MWI systems: firstly, the resonance-type antennas, and the traveling waves antennas such as Vivaldi
Summary
In microwave imaging (MWI), the radiating backscattered signals from the target region of the human body are collected and analyzed to retrieve the changes of electrical properties inside the tissues. The changes in backscattered signals that reflect the variances of electrical properties predict the presence of tumorous cells The principle of this technology is that microwaves travel through the human body from the transmitting antenna and are collected by the receiving antenna. To achieve the required features, researchers have proposed a quantity of UWB antennas such as: planar square monopole [2]; V-shaped monopole [3]; metamaterial-based UWB [4]; hook-shaped UWB; a monopole antenna by Liu and Yang is presented in [5] operating from 3 GHz to 10.7 GHz with a dimension of 10 × 10 × 1.6 mm ; semi-circular [6]; UWB [7,8]; square patch [9]; flexible CPW-fed fishtail [10]; tapered slot [11]; several types of Vivaldi antennas [12,13]; and many others. The proposed antenna is used for a breast phantom measurement system to analyze the variation of the backscattering signal and transmit-received pulses
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
