Design of X-band quadrature coupler based on Substrate integrated waveguide
Keywords:
Quadrature coupler, 3-dB Hybrid, Substrate integrated waveguide, CouplingAbstract
In this paper, an improved structural design method of a 3-dB quadrature coupler with high performance is presented. The H-plane wideband coupler is designed on the substrate-integrated waveguide (SIW). The design and simulation results show that the coupler has a low amplitude imbalanced and quadrature phase difference, small VSWR, and improved insertion loss. SIW technology has provided a flexible solution when designing a 3-dB coupler that features high performance, low cost, plane structure. It has been suitable for the development of microwave and millimeter wave applications with a high degree of integration. The proposed X-band quadrature coupler is an important candidate for application in the design of compact radar, phased antenna array, and radio communication systems.
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