To address the issue of significant interference from low-frequency dipoles on the radia-tion performance of high-frequency dipoles within dual-band embedded layout base station anten-nas,a cross-band decoupling method based on choke structure for bowl-shaped dipoles of base sta-tion antenna is proposed.A base station antenna with a decoupling structure is designed,incorpora-ting a microstrip choke structure on the arms of the low-frequency dipole.By analyzing the equiva-lent circuit of the choke structure,the induced current at the working frequency band of the high-frequency antenna,and the radar cross-section(RCS),the performance parameters of the choke structure are adjusted to effectively minimize the impact of the low-frequency dipole on the high-fre-quency dipole.To verify the feasibility of the proposed method,the designed dual-band dual-polar-ized base station antenna array with decoupling capability is tested.The results show that the low-frequency dipole has good impedance matching characteristics.The proposed method can effectively mitigate the issue of cross-polarization degradation caused by the influence of the low-frequency di-pole on the high-frequency dipole,and can stabilize the beam-width of the directional pattern.
base station antennabowl-shaped dipole elementchoke structureradar cross-sectioncross-band decouplingembedded scheme
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