36 Journal of Electronic & Information Systems | Volume 03 | Issue 01 | April 2021 Distributed under creative commons license 4.0 Journal of Electronic & Information Systems https://ojs.bilpublishing.com/index.php/jeis *Corresponding Author: Rajinikanth Yella, Electrical Engineering Computer Science (EECS), NCTU, Taiwan, China; Email: rajini.02g@g2.nctu.edu.tw DOI: https://doi.org/10.30564/jeisr.v3i1.3550 ARTICLE Circular Ribbon Antenna Array Design For Imaging Application Rajinikanth Yella 1* Krishna Pande 2 Ke Horng Chen 2 1. Electrical Engineering Computer Science (EECS), NCTU, Taiwan, China 2. Electrical Engineering (EE), NCTU, Taiwan, China ARTICLE INFO ABSTRACT Article history Received: 11 August 2021 Accepted: 20 August 2021 Published Online: 30 August 2021 Our goal is to develop THz module on chip to visualize bone grinding at the early stage so that arthritis can be visualized and treated early. A critical component of such module is antenna. A compact 4 by 4 beamforming antenna array for biomedical application is presented in this paper. We are proposing a novel antenna which is in the form of a circular ribbon shape with a gold patch. Gold material for the patch is used to enhance its conductivity and to cut down backward radiation. Differential port pin used to increase the bandwidth. Au-posts are fnally used for output connection. The proposed antenna operates over the frequency band from 201 GHz to more than 228 GHz. Directivity and gain of the proposed antenna are 13 dB and 7 dB respectively. This makes it applicable for imaging systems because of the frequency band for biomedical imaging. Index Terms— Beamforming antenna, antenna array, Advanced design system (ADS), Biomedical imaging. Keywords: Beamforming antenna Antenna array Advanced design system (ADS) Biomedical imaging 1. Introduction THz communications are one of the possibilities to meet the demand for ever-increasing data rates. In recent years, several publications have reported a 100 -300 GHz antenna design with a target for enhanced biomedical ap- plications [1,2] . Microwave imaging from 100 to 300 GHz is an auspicious design for biomedical applications such as detecting the skin cancer. Reason is that it has good resolution and generation characteristics [3] . The process for skin cancer detection with the high-frequency module on chip containing antenna is initially a pulse that is trans- mitted from the antenna, which will penetrate through the various tissues of the body. At a particular time, the transmitted signal will be reflected from the small size. Particles which represent that skin cancer. The same antenna can be used to collect the reflected signal for further measurements. For accurate results, the an- tenna should have high gain, directivity, resolution, dynamic range with compact size [4] . Also such technology is benef- cial for the detection of Arthritic. Many antenna designs have been proposed for biomedical imaging applications [5,6] , each has its advantages and drawbacks. Some published antennas have a structure of rectangular ribbon type, whereas others have a square structure. All the proposed structures are using only a single antenna for detecting the signal. As a result, weaker signals go undetected. In this paper, we are proposing a compact size 2.8*0.43 mm 2 circular ribbon-shaped beam- forming identify applicable funding agency here. If none, delete this antenna array with high gain and directivity. In addition, we are also studying application of meta material elements for this application.