The invention relates to a minimized co-location filter. The filter comprises a metal shell and a digital control circuit, a high-voltage driving circuit and an LC resonance circuit which are arranged in the metal shell in matching, wherein the digital control circuit adopts a programmable logical chip, one end of the digital control circuit is connected with the high-voltage driving circuit, and the other end of the digital control circuit is connected with a control device of a transceiver; the high-voltage driving circuit is formed by connecting field effect transistors VT1-VT3, resistors R1-R3 and a capacitor C1; the LC resonance circuit is a dual-tuning LC loop composed of a PIN (positive-intrinsic-negative ) diode capacitor array and a tuning inductor; the LC resonance circuit is connected with an I/O output end, and further comprises a RF (radio frequency) input terminal and a RF output terminal. The filter has simple and reasonable structure and small volume, is simple in control, good in frequency selecting performance, good in radiating performance, stable and reliable in work, and capable of effectively improving electromagnetic compatibility of the transceiver.