Presentation of an Algorithm for Design, Simulation and Construction of a Triple Frequency Leaky-wave Antenna Based on the Holographic Technique

Document Type : Original Article

Authors

1 Master Student, Field and Wave Telecommunications, Faculty of Electrical Engineering, University of Science and Technology, Tehran, Iran

2 Professor, Faculty of Electrical Engineering, University of Science and Technology, Tehran, Iran

3 Associate Professor, University of Science and Technology, Tehran, Iran

Abstract

The main purpose of this paper is to modify the holographic technique relationship (formula) and to present an algorithm for the design of multiple frequency compact leaky-wave antennas with broadside pencil beam radiation. In the design process, the following three software HFSS, MATLAB and CST, have been utilized. As a prototype, a triple frequency planar leaky-wave antenna is designed with the SLL less than -15 dB at E and H planes and broadside pencil radiation gain of 17.9, 18.5 and 19.2 dB at 15, 16 and 17 GHz, respectively. The unit cell forming the impedance surface of the hologram is selected as a regular hexagon to have the most isotropic behavior in response to the surface wave. Modification of the holographic relationship leads to the possibility of using a surface wave feed with a simple structure for proper matching as well as controlling the SLL on the E and H planes of the antenna radiation pattern at the designed frequencies. Eventually, by constructing and testing the proposed antenna, the accuracy of the proposed design process has been verified. In measuring the radiation pattern of the E and H planes of the different frequencies in the antenna room for each frequency, the launcher corresponding to that frequency receives the excitation and the other two launchers are perfectly matched. Finally, a good agreement is observed between the simulation and measurement results.

Keywords

References

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History

  • Receive Date: 17 November 2020
  • Revise Date: 13 February 2021
  • Accept Date: 03 July 2021
  • Publish Date: 23 September 2021

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