Design Of W-band Array Antenna And Omni-directional Linearly Polarized Antenna

With the rapid development of wireless communication technology,antenna plays an important role in receiving and transmitting electromagnetic wave.Nowadays,with the diversification and multi-function of wireless communication system,the requirement of antenna is higher and higher.In this context,combined with scientific research projects,an omni-directional symmetrical dipole antenna is designed,which is fed by microstrip structure.The working bandwidth of the antenna is 24.2%.In the whole frequency band,the roundness of the omni-directional plane of the antenna is less than 2d B,and the gain is more than 2.5d Bi.The antenna has good performance and small size.The test results are in good agreement with the simulation results.The antenna has been used in a communication system.With the increase of the working frequency of the antenna,especially in the W-band,the loss of the antenna increases significantly,which greatly affects the gain of the antenna.Communication system requires high gain and high integration for planar array antenna.In this paper,a high gain planar array antenna is designed.Firstly,a W-band low loss transmission line and antenna unit are designed;On this basis,a power distribution network based on low temperature co-fired ceramic(LTCC)technology for planar antenna array is designed,and the design of high gain and high integration planar array antenna is completed.Based on low temperature co-fired ceramic technology,a W-band low loss transmission line is designed.One is SIW(substrate integrated waveguide)and the other is GWG(gap waveguide).Based on the substrate integrated waveguide(SIW)transmission line,the 1/2power sharing network and 1/4 power sharing network are designed.Design a W-band radiation unit based on LTCC technology.The gain of the radiation unit is high,and it can reach more than 7d Bi in the working bandwidth.In the dielectric filled cavity,an L-shaped probe is introduced to complete the unit feeding.Combining the radiation unit with the power distribution network,a 4 × 4 element array high gain,high integration planar array antenna.The simulation results show that the structure of the antenna is symmetrical in E-plane and H-plane,and its pattern is also symmetrical.The side lobe of E-plane and H-plane is less than-12 d B,and the antenna gain is more than 18 dBi.