Third-order filtering base station antenna based on resonator type dipole

Abstract

The invention discloses a third-order filtering base station antenna based on a resonator type dipole. The third-order filtering base station antenna comprises a first vertical dielectric plate, a second vertical dielectric plate and a horizontal dielectric plate, wherein the first vertical dielectric plate is provided with a first resonator and a first copper-clad structure, the first copper-cladstructure and the first resonator form a first dipole, and 45-degree polarization feed is realized by a first feed port through a second resonator, a third resonator and a first coupling feed line onthe first vertical dielectric plate and the horizontal dielectric plate; a fourth resonator and a second copper-clad structure are arranged on the second vertical dielectric plate, a second dipole isformed by the second copper-clad structure and the fourth resonator, and 45-degree polarization feed is realized by a second feed port through a fifth resonator, a sixth resonator and a second coupling feed line on the second vertical dielectric plate and the horizontal dielectric plate; The antenna is advantaged in that dual polarization of the antenna is achieved, the filtering characteristic of a three-order Chebyshev filter is achieved, the polarization isolation degree is 20dB or above, and meanwhile the antenna has the advantage of being low in machining cost.

Description

Technical field[0001]The invention relates to the technical field of communication antennas, in particular to a third-order filtering 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 component in the wireless communication system, 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 easy processing, low cost, simple structure and stable radiation. At the same time, integrating the filtering function in the base station antenna can not only reduce the design of the post filter, 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. Therefore, the desig...

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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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