Base station anti-interference band-pass filter in low-intermodulation and high-power DCS frequency band

Abstract

The invention relates to a base station anti-interference band-pass filter in a low-intermodulation and high-power DCS frequency band. The base station anti-interference band-pass filter comprises a filter body A, a filter body B, and a pair of connectors. The filter body A comprises a filter housing and a filter cover plate integrally casted therewith. Resonant cavities are disposed on the filterhousing. Connector mounting holes are disposed at both ends of the filter housing. The filter body B is connected to the lower end of the filter body A. The filter body B includes a filter bottom plate. Resonant columns are integrally casted on the filter bottom plate and are in one-to-one correspondence with the resonant cavities. The pair of connectors is installed at the connector mounting holes. According to the base station anti-interference band-pass filter, in order to increase the contact surface of the product, the cover plate and the cavities are directly casted into one body, the bottom plate and the resonant columns are directly casted into one body. The casting can ensure the roughness requirement of the product and reduce micro-discharge between the cover plate and the cavities so as to ensure the performance indexes of the product.

Description

technical field [0001] The invention relates to a filter, in particular to a base station anti-jamming band-pass filter with low intermodulation and high power DCS frequency band. Background technique [0002] With the rapid development of mobile communication, the transmission power and receiving sensitivity of the communication system have been further improved, which puts forward higher requirements for the design and production of our passive communication products. The most direct requirement is that the requirements for intermodulation testing are becoming more and more stringent. In the early days, intermodulation was not taken seriously by everyone, so almost no companies tested intermodulation. Later, with the continuous improvement of system performance requirements, intermodulation was gradually Recognition, this is a great deal for designers. Many people have asked whether intermodulation is difficult. The consensus in the industry is that intermodulation is the ...

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Problems solved by technology

[0003] As we all know, the traditional cavity filter design is a combination of the cavity and the cover plate. The cover plate is installed on the cavity body, and the cover plate needs to be machined to complete. Therefore, the raw materials of the entire filter are wasted, and the corresponding cost will be relatively high. , cannot meet the requirements of high-quality products, and the traditional filter adopts the form of direct coupling when connecting the signal transmission (the resonant column is connected to the copper wire and the connector), and the copper wire needs to be fixed by welding when the connection is fixed , it is more troublesome, and there is a risk of error in manual assembly in this way, and the quality of the product is unstable

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