In the last decade, a new dawn for research on microwave imaging (MI) has been observed in the medical domain specially in the breast cancer diagnosis, since it offers many advantages over current imaging systems like computed tomography (CT), X-ray radiography etc. Microwave imaging system (MIS) provides a suitable platform for in-depth inspection of breast tissues. It helps in identification and localisation of morphological changes in these tissues. The emerging Ultrawideband (UWB) MI gives better results due to its non-ionizing signals which operate over the frequency ranging from hundreds of Megahertz (MHz) to tens of Gigahertz (GHz). In these systems, antennas play a significant role in establishing a sensor network. Hence, its optimization is very crucial because the device is placed at close proximity to the human body. In this paper, a miniaturised monopole patch antenna which operates at UWB frequency range with a microstrip feed line is proposed. The design is composed of a small rectangular patch with dimensions $0.17\lambda \times 0.25\lambda \times 0.02\lambda$ (where $\lambda$ is wavelength calculated at lower operating frequency 4.8 GHz). It has four corner cuts and a centrally located square slot with a truncated ground-plane for achieving UWB properties. The proposed antenna has the measured fractional bandwidth of $141\%(3.22-11.92\mathrm{G}\mathrm{H}\mathrm{z})$ with linearly increasing gain ranging from (1.4 to 6.43 dBi). The detailed time domain analysis is done to prove the efficacy of antenna for signal propagation. The advantage of proposed antenna is that it has low profile, compact size, easy to design which can be employed in MI breast cancer detection.

在过去的十年中，特别是在乳腺癌诊断中，在医学领域已经观察到微波成像（MI）研究的新曙光，因为与当前的成像系统（如计算机断层扫描（CT），X射线放射成像）相比，它具有许多优势微波成像系统（MIS）为深入检查乳房组织提供了合适的平台。它有助于识别和定位这些组织中的形态变化。新兴的超宽带（UWB）MI由于其非电离信号工作在数百兆赫兹（MHz）到数十兆赫兹（GHz）的频率范围内，因此可提供更好的结果。在这些系统中，天线在建立传感器网络中起着重要作用。因此，由于该设备放置在人体附近，因此其优化非常关键。在本文中，提出了一种微型单极贴片天线，该天线在超宽带频率范围内通过微带馈线工作。设计由尺寸小的矩形补丁组成$0.17\lambda \times 0.25\lambda \times 0.02\lambda$ （哪里 $\lambda$是在较低的工作频率4.8 GHz处计算的波长）。它具有四个切角和一个位于中央的方形槽，该方形槽带有一个截断的接地平面，以实现UWB特性。拟议的天线具有测量的分数带宽为$141％（3.22--11.92\mathrm{G}\mathrm{H}\mathrm{ž}）$线性增加的增益范围为（1.4至6.43 dBi）。进行了详细的时域分析，以证明天线在信号传播中的功效。所提出的天线的优点是其外形小巧，尺寸紧凑，易于设计，可用于MI乳腺癌的检测。