Study On W-band Patch Antenna And Its Array

As a newly developed spectrum resource,the millimeter wave frequency band has become a research hotspot.Research scholars at home and abroad like to study it.The existing millimeter wave applications are more widely used,such as automotive anti-collision radar,Military missile guidance,and mobile communication systems.As a key part of the millimeter wave transmission system,the performance of the antenna directly affects the reception quality of the signal.Because microstrip patch antennas have the advantages of high gain,miniaturization,simple structure,compactness,and easy integration with planar circuits,the antennas used in this thesis are all microstrip patch antennas.On this basis,this thesis focuses on millimeter wave patch antenna and its array.The main work of the thesis is as follows:Firstly,based on the millimeter waveband's demand for high-gain,narrow-beam antennas,this thesis proposes the design of an eight-element series-fed microstrip patch array antenna,which works at 94 GHz.The patch size design is based on the microstrip patch unit width gradient method.In order to facilitate the test,the transfer structure of the microstrip ground coplanar waveguide is designed.The test result shows that the maximum gain of the antenna is 13dBi,the half-power beam width is 7°,and the measured side lobe level SLL is-13.3dB.Secondly,based on the research of eight-element series-fed microstrip patch array antennas,by wire bonding technology,this thesis builds a matching network to develop the interconnection between the chip and the antenna.The field-path collaborative simulation method is used in HFSS.Co-simulation with ADS,the simulation results show that the matching network constructed by double branch lines is a good realization of the interconnection matching of the gold wire.Finally,this thesis proposes the design of an on-chip antenna,which is fed by differential line.We choose the 0.13?m SiGe BiCMOS process,and the antenna works at 94 GHz.The on-chip antenna uses a microstrip patch structure.The metal floor of the patch antenna can prevent electromagnetic waves from radiating to the silicon substrate side,which can alleviate the loss caused by the silicon substrate to a certain extent,so this thesis proposes the design of rectangular and circular patch antennas.The simulation results show that the two types of differential mode impedance bandwidth can reach about 10GHz,compared with rectangular patches,the gain of the circular patch is slightly higher,and the antenna pattern in the passband is stable and has good symmetry.Compared with the single-port feeding method,the cross-polarization of the antenna is reduced.