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This article presents a flexible ultra-wideband 4 × 1 MIMO antenna for breast cancer detection application. The antenna is designed with CPW feeding. The proposed MIMO antenna is constructed with an elliptical-shaped radiating patch and a slotted ground plane. The main aim of using a 4 × 1 MIMO antenna is to improve antenna performance and scatting signals. Initially, a single CPW-fed antenna element is designed with dimension 16 × 16 ×  0.254 mm 3  and the design is extended to 4 × 1 MIMO antenna with dimension 16 × 71.5 × 0.254 mm 3  by using the flexible material Rogers RT/duroid 5880 (tm). The 4 × 1 MIMO antenna operates from 3.2 GHz to 14 GHz frequency band with a directional radiation pattern. The performance of the antenna is observed in terms of S-parameters, gain, isolation, envelope correlation coefficient (ECC), diversity gains (DG), and specific absorption rate (SAR). S-parameters of transmitting and receiving antennas are observed with the help of breast phantom. All parameters are found within an acceptable range.

Elliptical Shape Flexible MIMO Antenna with High Isolation for Breast Cancer Detection Application