Research On Microstrip Antenna Decoupling And Its Application In Wireless Communication Systems

With the development of the technology,reducing the mutual coupling between antennas has become an important research field on antennas.Especially with the increasingly high requirements of system integration,antenna spacing decreases making the coupling between antennas more and more prominent.This article studies the decoupling method of the common microstrip patch antenna,the specific contents are as follows:The research background and significance of the decoupling between the antennas are described.At the same time,the methods of antenna decoupling in recent years are classified and analyzed briefly.For the E-plane distributed microstrip antenna,the decoupling structure of the grounding stubs is proposed to reduce the mutual coupling between the two small-pitch microstrip antennas.When the introduction of the additional coupling field and the direct coupling field between the antennas reverse,the two coupling fields will be offset.The decoupling effect of this method at different pitches is compared.The results show that the addition of the decoupling microstrip antenna can generally improve the isolation of 25dB.For the H-plane distributed microstrip antenna,the use of defects in the structure to achieve decoupling.In the microstrip antenna grounding plate with a dumbbell-shaped defects on the ground to prevent the transmission of surface waves between antennas to achieve the decoupling effect.The results show that the isolation of the microstrip antenna can be improved by 23dB after adding the decoupling structure.,For dual-frequency dual-polarization antenna,a decoupling structure of grounding stub and spherical defect is proposed to dual-band decoupling the dual-band microstrip antenna.The test results show that when the antenna spacing is 0.072?0,the isolation between the antenna at 5.2GHz and 6GHz is increased by 16.3dB and 23.2dB,respectively,effectively suppressing the mutual coupling effect between the antennas.A wireless communication is designed and combined with the microstrip decoupling antenna.The high isolation of the microstrip antenna is used to complete the information exchange function of the dual channel transceiver system.