Notched edge B shape micro strip patch array antenna for satellite communication

Abstract

Large reflector antennas for satellite communication have many disadvantages like low flexibility, mechanical complexity and high operation and maintenance costs. That’s why phased array antennas are being promoted to overcome this problem [1]. Several antenna types have been used to implement this technology among which the microstrip patch antennas are of great importance due to their eye-catching attributes as they are light weight, low profile, inexpensive and top of all, quick and simple to fabricate. Different microstrip patch antennas are proposed for uplink or downlink satellite communication. Design engineers have also designed dual band antennas that can be used for both uplink and downlink to achieve higher efficiency. Thesis provides a novel design dual band microstrip patch antenna operating at C band i.e. the most important band for satellite communication, with eye catching features of efficient gain, low return losses and higher efficiency. A novel design B shape microstrip patch antennas operating at two different frequencies of 4 GHz and 7.92 GHz are designed to meet the ITU standard and PTA assigned frequencies for downlink and uplink frequencies. B shape microstrip patch antenna at 4 GHz provides return losses of -40.70 dB and gain of 9.29 dBi with two elements array, while B shape microstrip patch antenna at 7.92 GHz provides return losses of -35.2 dB and gain of 10.8 dBi with two elements array. Keeping the concept of segment utilization in mind, a dual band B shape antenna is also designed at these two frequencies of 4GHz and 7.92 GHz. It provides the gain of 10 dBi and return loss of -30.8 dB for uplink frequency of 7.92 GHz. Similarly it provides the gain of 9.1 dBi and return loss of -25.2 dB for downlink frequency of 4 GHz. Cutting edge technique is further used to improve gain of antennas