In emergency or disaster situations, when communications were interrupted due to damaged local network infrastructures, coordination are affected. Moreover, the deployment of specialized technologies such as satellite and shortwave communication network were found impractical. The objective of the study was first, to construct an improvised antenna that will be tested on an area with no cellular network and test the router's operating range using it, and second, to design and develop a mobile multimedia messaging application that utilizes WLAN to send data. Results of the testing shows that improvised antenna achieved operating range of 192 meters, the range achieved 215 meters in area with no cellular network, and the application was capable of sending multimedia messages over WLAN.Institute of the Philippines-Manila, Philippines. subjected to unavailability when disaster happens since its infrastructure was prone to destruction. The second was the private communication network, which was intended particularly for the needs of government or public welfare but tends to be incompatible with other communication methods. The third was the satellite communication, this network provides a very wide coverage but when it comes to its transport bandwidth, it lacks the system capacity allowing only the access of special terminals. The fourth was the shortwave communication, though the stability and bandwidth performance of this network was poor, its strength was its survivability [10]. Utilization of satellite and short wave in emergency communication systems as a means of communication was adopted but requires specialized facilities and technologies. As a result, government units, military army, and telecommunication companies could only use such technologies [11] [12].On the viewpoint of the previous research papers, local network infrastructures were most likely be damaged and would not work properly or would stop functioning in case of disaster and would result on the interruption of communications between authorities, affecting their coordination and cooperation in rescuing persons at risk or an emergency situation. Moreover, when local network infrastructures were rendered non-functional, deployment of specialized technologies such as satellite and shortwave communication network was found impractical.Thus, this study attempt to develop an IEEE 802.11 compliant antenna with a WLAN mobile multimedia messaging application for emergency communication purposes.
II. LITERATURE REVIEW
A. Importance of Communication in Emergency or Disaster SituationEmergency communication means the communication methods multipurpose using different communication resources to ensure rescue and necessary communication when the natural or man-made emergency situation happens and the regular communication resource can't meet the suddenly increased communication needs [10].