Compact Star Shaped Swastika Stub Integrated Multiband Printed Antenna for Ku/K/Ka Band Application

Abstract

Abstract The triple-band operation of a microstrip patch antenna on an FR4 substrate is demonstrated, covering Ku-, K-, and Ka-bands. The antenna features a star-shaped patch with a swastika stub on the FR4 dielectric substrate, activated by a 50-ohm microstrip transmission line. The Finite Integration Technique (FIT) is employed in computer simulations, aligning with a comprehensive investigation. The lower band exhibits measured impedance bandwidths with a VSWR of 2:1 at 3.02 GHz (11.83 to 14.93 GHz), 4.29 GHz (16.42 to 20.72 GHz), 1.85 GHz (21.38 to 23.40 GHz), and 3.49 GHz (23.74 to 27.09 GHz). This innovative antenna design showcases versatility across frequency bands, with the FR4 substrate contributing to its production. The activated microstrip transmission line ensures efficient signal transmission with stable 50-ohm impedance. The FIT-based simulation tool enhances precision in predicting the antenna's behavior. Within the operational frequency range, the antenna demonstrates a stable omnidirectional radiation pattern, crucial for its applications in communication systems. Comparisons between measurement and simulation findings validate the proposed prototype's performance, emphasizing the reliability of the FIT-based simulation tool. This comprehensive study highlights not only the antenna's operational capabilities but also the accuracy of the computational approach employed.

Keywords

• Microstrip Patch Antenna
• Triple-Band Operation
• FR4 Substrate
• Finite Integration Technique (FIT)
• Omnidirectional Radiation Pattern