Malpractice is one of the serious issues faced in examination hall. The candidates will be examined thoroughly in the entrance itself. If they are found with possessing the electronic devices, the PGD (Paper Gadget Detector) will detect it. LCD (Liquid Crystal Display) displays the values and an alarm system will be used to give a warning to them. The proposed system is to search the candidates who are carrying the hidden written paper to the exam hall. The searching of hidden written paper can be obtained from Rectangular Microstrip Patch Antenna (RMPA). Here RMPA acts as a sensor which is used to detect the hidden material. This sensor can detect the target based on the permittivity value of each material. The sensors used in this study can be adjusted according to the values of blank paper and also to identify something written in the paper with different densities. The designed antenna has been simulated using Advanced Design System (ADS). The designed antenna (single element and 4 elements) has been compared in terms of various parameters like Gain, Efficiency, Directivity and Radiation Pattern etc.