Hossain Amran, Islam Mohammad Tariqul, Islam Md Tarikul, Chowdhury Muhammad E H, Rmili Hatem, Samsuzzaman Md
Department of Electrical Electronic and Systems Engineering, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia.
Department of Electrical Engineering, Qatar University, Doha 2713, Qatar.
Materials (Basel). 2020 Nov 2;13(21):4918. doi: 10.3390/ma13214918.
In this paper, a compact planar ultrawideband (UWB) antenna and an antenna array setup for microwave breast imaging are presented. The proposed antenna is constructed with a slotted semicircular-shaped patch and partial trapezoidal ground. It is compact in dimension: 0.30λ × 0.31λ × 0.011λ, where λ is the wavelength of the lowest operating frequency. For design purposes, several parameters are assumed and optimized to achieve better performance. The prototype is applied in the breast imaging scheme over the UWB frequency range 3.10-10.60 GHz. However, the antenna achieves an operating bandwidth of 8.70 GHz (2.30-11.00 GHz) for the reflection coefficient under-10 dB with decent impedance matching, 5.80 dBi of maximum gain with steady radiation pattern. The antenna provides a fidelity factor (FF) of 82% and 81% for face-to-face and side-by-side setups, respectively, which specifies the directionality and minor variation of the received pulses. The antenna is fabricated and measured to evaluate the antenna characteristics. A 16-antenna array-based configuration is considered to measure the backscattering signal of the breast phantom where one antenna acts as transmitter, and 15 of them receive the scattered signals. The data is taken in both the configuration of the phantom with and without the tumor inside. Later, the Iteratively Corrected Delay and Sum (IC-DAS) image reconstructed algorithm was used to identify the tumor in the breast phantom. Finally, the reconstructed images from the analysis and processing of the backscattering signal by the algorithm are illustrated to verify the imaging performance.
本文提出了一种用于微波乳腺成像的紧凑型平面超宽带（UWB）天线及天线阵列装置。所提出的天线由开槽半圆形贴片和部分梯形接地平面构成。其尺寸紧凑：0.30λ×0.31λ×0.011λ，其中λ为最低工作频率的波长。为了设计目的，假定并优化了几个参数以实现更好的性能。该原型应用于3.10 - 10.60 GHz超宽带频率范围内的乳腺成像方案。然而，该天线在反射系数低于 - 10 dB时实现了8.70 GHz（2.30 - 11.00 GHz）的工作带宽，具有良好的阻抗匹配，最大增益为5.80 dBi，辐射方向图稳定。该天线在面对面和并排设置下的保真度因子（FF）分别为82%和81%，这说明了接收脉冲的方向性和微小变化。制作并测量了该天线以评估其特性。考虑了一种基于16天线阵列的配置来测量乳腺模型的后向散射信号，其中一个天线作为发射机，其余15个天线接收散射信号。在模型有肿瘤和无肿瘤两种配置下采集数据。随后，使用迭代校正延迟求和（IC - DAS）图像重建算法来识别乳腺模型中的肿瘤。最后，展示了通过该算法对后向散射信号进行分析和处理后重建的图像，以验证成像性能。
