A third-order filter base station antenna based on a resonator-type dipole

Abstract

The invention discloses a third-order filtering base station antenna based on a resonator-type dipole, which comprises a first vertical dielectric plate, a second vertical dielectric plate and a horizontal dielectric plate; the first vertical dielectric plate is provided with a first resonator and a The first copper clad structure, the first copper clad structure and the first resonator form a first dipole, passing through the second resonator, the third resonator and the first coupling feeder on the first vertical dielectric plate and the horizontal dielectric plate, Make the first feed port realize ‑45° polarized feed, the second vertical dielectric board is provided with a fourth resonator and a second copper-clad structure, and the second copper-clad structure and the fourth resonator form a second dipole , through the fifth resonator, the sixth resonator and the second coupled feeder line on the second vertical dielectric plate and the horizontal dielectric plate, the second feed port can realize ‑45° polarized feeding; the present invention realizes antenna dual polarization And it has the filtering characteristics of the third-order Chebyshev filter, the polarization isolation is over 20dB, and has the characteristics of low processing cost.

Description

technical field [0001] The invention relates to the technical field of communication antennas, in particular to a third-order filter base station antenna based on a resonator-type dipole. Background technique [0002] With the rapid development of wireless communication systems, there are higher requirements for equipment in different application scenarios. As an important device in wireless communication systems, base station antennas need to optimize their filtering function and size as much as possible. In the design of base station antennas, dipole antennas are widely used due to their advantages of easy processing, low cost, simple structure and stable radiation. At the same time, integrating filtering functions in base station antennas can not only reduce the design of post-stage filters, but also The matching circuit and loss between the filter and the antenna can be reduced, which not only ensures the performance of the antenna, but also reduces the overall size. Th...

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Problems solved by technology

In the prior art, some methods add parasitic elements to the dipole antenna to achieve filtering characteristics, and some use the integrated design method of microstrip resonators and patch antennas to realize the filtering antenna with wide stopband characteristics, but all of them have increased Antenna complexity or deficiencies affecting the radiation and impedance characteristics of the antenna

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