An ultrawideband planar elliptical slotted patch antenna without any matching liquid for biomedical application

The design and analysis of a planar ultra-wideband elliptical slotted patch antenna for application in breast microwave radar system is presented in this paper. It is modelled in front of a breast phantom of cylindrical shape. No matching liquid is used in this model. A novel partial ground plane with protrusions on two sides is used for achieving good matching without any coupling medium. For effective signal penetration, a low frequency band of operation is selected. The antenna has a wide impedance bandwidth operating from around 1.8 GHz to 6.9 GHz or higher. A parametric study is conducted to understand the effects of important parameters on the antenna performance and to develop some design guidelines. The fabricated prototype was tested in the presence of a breast phantom. The transmission response of the antenna was also measured, which shows reduced transmission loss compared to a previous study since the antenna is in the air. The measured results are in good agreement with simulated data. This antenna can be used in a microwave imaging system for radar based breast cancer detection, where wide impedance bandwidth is required. © 2020 by the authors.