To address the challenge of accommodating a large number of multi-system carrier antennas,a wideband shared aper-ture compound antenna based on printed dipole structure is proposed.The shared aperture design incorporates two distinct forms of printed dipoles.A planar printed dipole structure is used to achieve for the wideband high-gain linear polarization antenna,a wideband directional coupler for the sun-difference pattern radiation,and a cross dipole low-gain antenna for the circular polarization radiation.These antenna elements are printed on the same microwave dielectric substrate,and the mutual interference between them is mitigated through the techniques including the antenna unit layout optimization,relative positioning,and isolation rings.The performance of common aperture composite antennas is achieved to meet the needs of engineering application,and process an antenna prototype.The test results show that the VSWR is less than 1.8,the gain is greater than 13.5 dBi,the azimuth difference beam zero depth is less than-25 dB of the linear polarized antenna in the range of 1.2～1.8 GHz;and the VSWR is less than 1.6,the gain is more than 6.5 dBi,the axial ratio is less than 2.5 dB of the circularly polarized antenna in the range of 1.2～1.8 GHz,the test results are basically consistent with the calculation results.The proposed design can meet the requirements of various wireless communication systems by reducing the number of antennas,thereby effectively saving space on the carrier platform.The compound antenna has broad applica-tion prospects,thanks to its simple and compact structure,low profile,and ease of engineering implementation.
万方数据
维普
