High-pass filter and communication cavity device with same

Abstract

The invention provides a high-pass filter and a communication cavity device with the same. The filter comprises a cavity body with a cavity and a cover plate covered with the cavity body and is provided with connecting ports for input and output respectively at two ends of the cavity, wherein the cavity is internally provided with a conductor assembly including a plurality of conductors, the plurality of conductors are arranged along the longitudinal direction of the cavity and are sequentially in capacitive coupling connection, and the conductors at two ends of the conductor assembly are respectively and correspondingly electrically connected with the connecting ports for input and output; and at least part of the conductors extend towards the side wall or the bottom wall of the cavity body to form a supporting member fixed with the cavity body. The high-pass filter adopts a plurality of conductors for connection and forms a series capacitor under the insulation of a dielectric piece,and the supporting member is electrically connected with the conductors and the side wall of the cavity body to form a parallel inductor. The conductors are enabled to have high stability in the cavity body by setting the supporting member. Meanwhile, the high-pass filter can form a Chebyshev-type filter, has a good out-of-band rejection effect, and is simple in structure and easy to produce andprocess.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a high-pass filter and a communication cavity device having the same. Background technique [0002] With the rapid advancement of 5G technology, in order to obtain larger channel capacity and higher transmission rate, mobile communication systems are developing towards higher frequencies. The 3GHz-6GHz frequency band, one of the 5G planning frequency bands, not only greatly improves the channel capacity and transmission rate, but also can be better compatible with existing systems. In order to maximize the use of spectrum resources, the bandwidth of the filter is getting wider and wider, and the requirements for out-of-band suppression are getting higher and higher. Therefore, during the evolution of the mobile communication system, a high-performance high-pass filter is naturally required. [0003] The high-pass filter in the prior art mainly includes microstrip line, strip...

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Problems solved by technology

[0003] The high-pass filter in the prior art mainly includes microstrip line, stripline, waveguide, etc., and its basic circuit model is composed of series capacitance and parallel ground inductance. The advantages of microstrip line and stripline are low cost, Light weight, simple structure, easy to integrate, but the disadvantages are low Q value, small power capacity, difficult to debug, waveguide high Q value, large power capacity, but close to the high-order mode, high cost, large volume, and relatively heavy

Such a high-pass filter cannot meet the requirements of mobile communication systems, and a better high-pass filter solution must be found

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