TM010 module low loss high selectivity cavity filter

The invention discloses a TM010 mode low-loss high-selectivity cavity filter, which comprises a metal main body, a cover plate, resonant frequency adjustment screws, an inter-cavity coupling strength adjustment screw, and input/output interfaces, wherein the inside of the main body is at least provided with two cylindrical cavity resonators, the cavity resonators are numbered according to the sequence, a centralized coupling window is arranged between the two cavity resonators with adjacent serial numbers, the resonant frequency adjustment screws and the inter-cavity coupling strength adjustment screw are fixed on the cover plate and extend into the cylindrical cavity resonators and the centralized coupling window respectively, and the input/output interfaces are connected with the head and tail cavity resonators respectively. The filter adopts cylindrical waveguide cavity technology to ensure that the electromagnetic field is entirely centralized in a closed conductor to propagate, thereby obtaining a high Q