A printed dual-element antenna array for LTE MIMO mobile phone applications is presented in this paper. The two array elements are symmetrically placed with the same dimensions, and each of the them consists of a novel driven strip and a wandering shorting strip. The driven strip is a whole loop, which improves the impedance matching for the upper band. Therefore, the bandwidth coverage is expanded and the antenna size is minimized at the same time. In addition, thanks to the protruded ground on the ground plane, the antenna isolation between the two array elements is significantly enhanced. The proposed planar antenna array successfully covers the seven operating bands of GSM850/900/1800/1900/UMTS2100/LTE2300/2500, and the isolation is more than 10 dB. The prototype was fabricated and tested, withSparameters, efficiency, radiation patterns, envelop correlation coefficient (ECC), and ergodic capacity presented. From the measured results, it is indicated that the antenna array has excellent and reliable performances when it is applied in MIMO applications.
To meet the demand of digitizing progress of pharmaceutical retail industry, there are various kinds of software are made for pharmaceutical retail enterprise. However, much commercial software on the market fails to meet the demand of data transmission safety. Therefore, a novel system was designed for medium size pharmaceutical retail enterprise with multiple branches. It is designed to digitize the process of retail operations including management of stock, order client, staff, product, branch and warehouse. Advanced Encryption Standard (AES) algorithm was used to secure the data transmission on the Internet. The system can be deployed 1 in pharmaceutical retailing, hospital prescriptions issues, pharmaceutical company management, medical supplies market, medical devices market and hospital staff management. With minor modification the system can be deployed to other retail or wholesale industry.
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