Air-Filled Substrate Integrate Waveguide Antenna Analyzed with Theory of Characteristic Modes

Abstract:

An air-filled Substrate Integrated Waveguide (SIW) Antenna is presented in this paper. The main goal of this work is to design a low profile antenna (0.028 and lambda;0 at the central frequency, 4.51 GHz) with a good bandwidth and unidirectional radiation pattern. To obtain this performance, the antenna is formed by four semi-closed SIW cavities without lateral sidewalls and is excited by means of a capacitive feed. A parametric study, carried out using an incident plane wave and the Theory of Characteristic Modes, has been used to study the behaviour of the semi-closed SIW cavity antenna. Simulated results show a good performance, covering the frequency range 3.37-5.65 GHz with a return loss above 10 dB.

Año de publicación:

2019

Keywords:

• low profile
• semi-close SIW
• Characteristic modes
• rectangular cavity

Fuente:

scopus

google