High return loss microstrip patch antenna design for radio applications

In this demonstrative work, rectangular microstrip patch antenna has been proposed. Teflon substrate having thickness of 4mm and dielectric constant of ε
_r
= 2.1 has been employed. The design and analysis of the proposed system has been carried out on Computer Simulation Technology (CST) Microwave Studio 2014. The proposed antenna has compact size, light weight. The proposed antenna ground and patch has been designed using copper of thickness 0.1mm. It has been analysed that the proposed antenna has an impedance bandwidth of 235MHz with an operating frequency range of 5.4296-5.6647GHz and is resonant at 5.545 GHz. The gain, directivity and high return loss of the proposed antenna are 7.990dB, 7.558dBi and -81.399dB at resonant frequency of 5.545GHz, respectively. The proposed antenna can be suitably employed for, Weather Radar applications (5350MHZ-5450MHz), Radiolocation and Military applications (5470MHz-5570MHz) and Maritime Radar applications (5570MHz-5650MHz). The proposed antenna is practically fabricated and tested using E5071C Network analyzer. It has been concluded that the practical antenna result closely matches with the simulated antenna result.