Broadband and High Gain Circularly Polarized Slot Array Antenna with Hybrid Coupler Feed Network

Abstract

In this paper, a new design of a broadband high gain circularly polarised slot array antenna (CPSSAA) is presented. The proposed antenna is fed by a symmetric hybrid coupler for C-band application. The designed single array element is excited by L-shaped strip with a tapered end, located along the circular-slot diagonal line in the back plan. From the single array element simulation results, the -10dB return loss bandwidth is around 8.79GHz (2.51GHz-11.3GHz). The designed single array element is 50% wider than the impedance bandwidth of a previous similar design. The proposed antenna is composed of 2 × 2 Array elements. The measured results for The final structure of circularly polarised slot array antenna are about 54% (3.5GHz-6.5GHz) for return loss BW, 22% (4.4GHz-5.4GHz) for axial ratio and peak Gain around 12.45dBic at 5.5GHz. The simple structure, light weight, compact size, circular polarization with a very high polarization polarity and a high gain, make it a perfect match for C-band applications, in which a circular polarization antenna is required. The measured results corroborate well with the simulated results.

Keywords

References

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Applied Electromagnetics
Volume 4, Issue 1 - Serial Number 1
January 1395
Pages 45-52

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History

  • Receive Date: 24 June 2017
  • Revise Date: 22 February 2023
  • Accept Date: 19 September 2018

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