Design of shorted microstrip patch antenna array

Abstract

In wireless communication, the requirement of the portable device increased tremendously. Portable devices have to be small as much possible. For that purpose, microstrip patch antennas are used but as demand increases for the smaller devices researchers look for the even smaller antenna than the microstrip patch antennas. The need for smaller devices increases just because they are very easy to carry. Researchers have found out many techniques for the size reduction of the microstrip patch antennas. Shorted microstrip patch antenna is one of the technique from it. In this technique, shorting is done between patch and ground. This shorting is done where the impedance is zero or minimum, i.e. at virtual short. By doing this, the half part is discarded. So finally the size of the antenna is reduced to its half and resonant frequency remains same. How and where the shorting is done is explained in this thesis. Due to this shorting, size is reduced to its half but the gain is also decreased. To improve the gain, I have designed antenna array of shorted microstrip patch antenna. Different configurations of the array are mentioned in this thesis. Then I have gone for the fabrication of it. It also concludes the fabrication results.