**Acknowledgements**

*Advances in Array Optimization*

**148**

**5. Conclusion**

**Figure 17.**

*antenna.*

The comparison of antenna performance for single cavity Vivaldi antenna and double cavity Vivaldi antenna are reported. The single cavity and double cavity have same performances, but single cavity gives efficient impedance bandwidth than the double cavity. The gain of double cavity is better than single cavity at higher

*(a) Measured gain plot of single cavity Vivaldi antenna and (b) measured gain plot of double cavity Vivaldi* 

The simulated and measured results of the proposed antenna were compared and found to be in good agreement. The optimum performance of the antenna in simulation is obtained by using parametric analysis. VSWR less than 3:1 is achieved over the band from 8 to 18 GHz. The antenna due to its compactness and lightweight serves its applications in radio communications, avionics, spectrum monitoring and military system. It also finds applications in digital data transmission via

frequencies and antenna miniaturization also possible.

satellites and for voice/audio transmissions.

At the outset, I would like to take this as an opportunity to convey my gratitude to IntechOpen publishing house & their support team's for their consistent guidance, undue financial support at every step in bringing out this chapter in their book has left me in awe. The process that followed in developing this chapter for the book has been a very stimulating experience. Couple of months of intensive deliberations, several stages of drafting and redrafting of the manuscript to meet the standards of the book and the publishing house has enriched my writing skills. I would like to thank my parents & family members for their love and guidance, and the management of my college, PVP.Siddhartha Institute of Technology, for constant encouragement.
