Low-interference broadband filtering oscillator and antenna array

A low-interference broadband filtering oscillator comprises a radiating surface, a balun and a grounding seat which are sequentially connected from top to bottom, the radiating surface is composed of four oscillator arms which are arranged in an orthogonal mode, the four oscillator arms form dual polarization, and the upper surface of the head end of each oscillator arm is provided with a feeding point connected with the balun. The lower portions of the two sides of the tail end of the feeding point are each coupled with a coupling filtering structure located on the lower surface of the corresponding oscillator arm, the feeding point and the coupling filtering structures form a first lumped LC circuit, and the two sides of the tail end of the feeding point are each sequentially connected with a group of second lumped LC circuits and distributed LC circuits which are connected in series. And the tail ends of the two distributed LC circuits on the same oscillator arm are coupled and connected. The compact anten