Multiband Amateur Radio Antenna Design

In times of crisis such as world natural disasters, and the collapse of the communication systems due to the overuse of the networks or bad weather, the internet, mobile phones, and other communication media are not responding or overloaded, Amateur Radio system is the main source of communication that the disaster rescue teams, polices, volunteer public service, and other people relay on in order to save lives, to communicate among them and to know the situation of their families, friends, and even neighbours.
However, because of this main reason and the fact that amateur radio is an enjoyable hobby that makes people have good time by sharing information, and meet new people in the same city, country, and worldwide. Amateurs, scientist, engineers and other researchers are still trying to improve more and more the performance of the amateur radio antenna.