Research On Reflective Antenna Based On Substrate Integrated Waveguide Technology

The substrate integrated waveguide structure has the characteristics that it can be approximately equivalent to the conventional dielectric-filled waveguide in terms of transmission characteristics and the like.Due to this feature,the function of the conventional waveguide can be realized and the structure size tends to be planar miniaturization,which can be used to improve the overall antenna.performance.The parabolic reflector antenna can use the geometric features of the paraboloid to change the direction of electromagnetic wave propagation,and can obtain a plane wavefront with a large aperture position to achieve equal phase properties,which can greatly improve the gain.However,due to the disadvantages of excessive volume and cumbersome appearance in the conventional parabolic antenna,the characteristics of the substrate integrated waveguide structure can be applied to the construction of the parabolic reflecting surface to realize integration with the planar circuit.In this paper,the basic structure of the H-face horn antenna,parabolic reflector antenna and substrate integrated waveguide structure,radiation mechanism and waveguide reflection array are studied.In this paper,a two-band,bias-biased parabolic metal column shaped antenna is designed.The antenna consists of two Hplane horn antennas based on the substrate integrated waveguide structure and reflections arranged by several metal columns.Structure and composition.The Hface horn antenna based on the substrate integrated waveguide structure working in the Ku-band adopts a microstrip line for feeding,and the H-face horn antenna with metal through-hole has a reflection coefficient smaller than-10 dB and the frequency band is 12.9 GHz to 14.5 GHz.The relative bandwidth is 11.6%.The gain is G=6.4dB at the frequency f = 14 GHz.The H-side horn antenna based on the substrate integrated waveguide structure operating in the Ka-band has a reflection coefficient of less than-10 dB of 27.3GHz ~30.7GHz,the relative bandwidth is 11.7%,and the gain is G=6.4dB at the frequency f=28GHz.On the basis of two H-face horn antennas based on the substrate integrated waveguide structure,a parabolic cylindrical shape reflection structure arranged by a plurality of metal columns is loaded to obtain a dual-band bias-feeding parabolic metal column shaped antenna.The antenna has a reflection coefficient of less than-10 dB in the 13 GHz to 15 GHz and 27 GHz to 29 GHz bands.When the frequency is f = 14 GHz,the gain is G=13.5 dB,which is better than the H-face horn antenna without the parabolic cylindrical design.The gain is 7dB higher;at a frequency of f=28GHz,the gain is G=16dB,which is 10 dB higher than the gain of the H-face horn antenna without the parabolic cylindrical design.Finally,the antenna was processed and tested.