Feeding matching apparatus of multiband antenna, multiband antenna, and radio communication device

摘要

The present disclosure relates to the field of antenna technologies and discloses a feeding matching apparatus of a multiband antenna, a multiband antenna, and a radio communication device to improve a bandwidth and efficiency of a lower frequency band. The feeding matching apparatus of a multiband antenna includes: a grounding portion; a feeding portion connected to a signal source, where a signal of the signal source is input into the feeding portion; and two or more ground cable branches with different lengths, where one end of each ground cable branch is electrically connected to the feeding portion, the other end is electrically connected to the grounding portion, at least one ground cable branch is connected in series to a signal filtering component, and the signal filtering component is capable of preventing a signal lower than a frequency point corresponding to the signal filtering component from passing through it.

主权项

1. A multiband antenna, comprising:
one or more radiating portions; a grounding portion; a feeding portion coupled to the radiating portions, wherein each radiating portion is configured to transmit a signal to the feeding portion and receive a signal transmitted from the feeding portion; a first ground cable branch, wherein one end of the first ground cable branch is electrically coupled to the feeding portion, the other end of the first ground cable branch is electrically coupled to the grounding portion, wherein the first ground cable branch is coupled in series to a first signal filtering component, the first signal filtering component terminates a transmission of a signal having a frequency lower than a frequency point of the first signal filtering component; and a second ground cable branch, wherein one end of the second ground cable branch is electrically coupled to the feeding portion, the other end of the second ground cable branch is electrically coupled to the grounding portion, wherein the second ground cable branch is coupled in series to a second signal filtering component, the second signal filtering component terminates a transmission of a signal having a frequency lower than a frequency point of the second signal filtering component; wherein a length of the first ground cable branch is shorter than a length of the second ground cable branch, and the frequency point of the first signal filtering component is higher than the frequency point of the second signal filtering component.