Abstract: Embodiment high-frequency radiator includes two plus and minus 45-degree single-polarized radiators. The single-polarized radiator includes a radiation arm, a balun, a feeder circuit, a filter, and a ground plane. The radiation arm and the balun are electrically connected. The feeder circuit and the balun are separately disposed on two surfaces of a first dielectric plate that is placed vertically. The ground plane is disposed on a downward surface of a second dielectric plate that is placed horizontally. The first dielectric plate is vertically disposed on the second dielectric plate, and the filter includes a capacitor branch and an inductor branch. The inductor branch is disposed on a same surface of the first dielectric plate as the balun, the inductor branch is separately electrically connected to the balun and the ground plane, and the capacitor branch is coupled to the ground plane.

Abstract: A multi-band antenna system and a method for controlling inter-band interference in the multi-band antenna system are provided. The multi-band antenna system includes at least one first radiating element and at least one second radiating element. An operating frequency band of the first radiating element is higher than an operating frequency band of the second radiating element. Each first radiating element includes a grounding structure, a balun, and at least two radiation arms. One end of the balun is electrically connected to the at least two radiation arms. The balun includes at least one conductive structure. The balun is configured to: after obtaining a differential mode signal, input the differential mode signal to the grounding structure using the at least one conductive structure. The differential mode signal is a signal obtained by the balun by sensing a signal from the second radiating element in a differential mode manner.

Abstract: Embodiment high-frequency radiator includes two plus and minus 45-degree single-polarized radiators. The single-polarized radiator includes a radiation arm, a balun, a feeder circuit, a filter, and a ground plane. The radiation arm and the balun are electrically connected. The feeder circuit and the balun are separately disposed on two surfaces of a first dielectric plate that is placed vertically. The ground plane is disposed on a downward surface of a second dielectric plate that is placed horizontally. The first dielectric plate is vertically disposed on the second dielectric plate, and the filter includes a capacitor branch and an inductor branch. The inductor branch is disposed on a same surface of the first dielectric plate as the balun, the inductor branch is separately electrically connected to the balun and the ground plane, and the capacitor branch is coupled to the ground plane.

Abstract: A multi-band antenna system and a method for controlling inter-band interference in the multi-band antenna system are provided. The multi-band antenna system includes at least one first radiating element and at least one second radiating element. An operating frequency band of the first radiating element is higher than an operating frequency band of the second radiating element. Each first radiating element includes a grounding structure, a balun, and at least two radiation arms. One end of the balun is electrically connected to the at least two radiation arms. The balun includes at least one conductive structure. The balun is configured to: after obtaining a differential mode signal, input the differential mode signal to the grounding structure using the at least one conductive structure. The differential mode signal is a signal obtained by the balun by sensing a signal from the second radiating element in a differential mode manner.