1results about How to "Improving Impedance Bandwidth" patented technology

This invention discloses a microwave and millimeter-wave circularly polarized antenna based on a SIW circular cavity, comprising a first dielectric substrate, a second dielectric substrate, a millimeter-wave radiating patch, a microwave radiating patch, a microwave feed patch, a metal via, a millimeter-wave SIW circular cavity, a metal ground plane, a microwave feed probe, a microwave feed network, and a millimeter-wave feed network. The upper surface of the first dielectric substrate is printed with the millimeter-wave radiating patch, the microwave radiating patch, and the microwave feed patch. The millimeter-wave radiating patch has a radiating slot, and the microwave feed patch and the microwave radiating patch are connected. The second dielectric substrate is located directly below the first dielectric substrate. The upper surface of the second dielectric substrate is printed with a metal ground plane, and feed slots and feed circular holes for the microwave feed probe to pass through are etched on the metal ground plane. The lower surface of the second dielectric substrate is printed with the microwave feed network and the millimeter-wave feed network. This invention has advantages such as multi-frequency operation, wide bandwidth, and dual circular polarization, and has certain potential in wireless communication applications.