Broadband dual-polarized filtering dipole antenna without additional circuit

Abstract

The invention discloses a broadband dual-polarized filtering dipole antenna without an additional circuit, which is characterized in that two pairs of mutually perpendicular radiation array sub-arms are printed on a horizontal dielectric substrate, and the two pairs of mutually perpendicular radiation array sub-arms are horizontally placed; two vertical dielectric substrates are respectively equipped with baluns to feed the radiation array sub-arms, and the balun includes a slot line, two closed stubs and an inverted L-shaped feeder line with the tail end being open-circuited; the two vertically intersecting vertical dielectric substrates are arranged on a reflecting plate; the closed stubs are close to the middle position of the vertical dielectric substrates on the top and connected withthe radiation array sub-arms on the horizontal dielectric substrate through extending upwards so as to constitute a short-circuit inverted L-shaped resonator together; and the horizontally placed radiation array sub-arms and the part which does not extend upward at the top of each closed stub constitute resonant groove together. The invention realizes a broadband filtering antenna operating at 1.7-2.8GHz, and has the excellent performance such as high isolation, weak cross polarization and good filtering and radiation characteristics.

Description

technical field [0001] The invention relates to the field of radio frequency communication, in particular to a broadband dual-polarization filter dipole antenna without an external circuit. Background technique [0002] With the rapid development of mobile communication technology, in order to make modern communication systems compatible with multiple communication standards or support high-speed data transmission, the bandwidth requirements for modern communication systems are higher than ever. In addition, dual-polarized antennas are widely used in communication systems because they can increase channel capacity and reduce multipath fading and polarization mismatch. However, for a multi-band base station array whose subarrays work in different frequency bands, using filter antennas can effectively reduce interference. Therefore, the research on broadband dual-polarization filter antenna is of great significance. In recent years, researchers have done a lot of research on...

AI Technical Summary

Problems solved by technology

[0007] The present invention overcomes the defects that the traditional filtering antenna design method can only be used for single-polarized antennas or narrow bandwidth and complex circuit structure, or the traditional dual-polarized antennas do not have filtering characteristics, etc.

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