Base Station Antenna Cavity Structure for Low Wind Load
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Solution Overview
Problem
Existing antennas in base stations face challenges in improving radiation efficiency, reducing wind loads, and increasing installation area while meeting energy-saving and low-carbon requirements.
Innovation Solution
The antenna design includes a power splitter and radiating element with a cavity and feeding network, eliminating the need for a radome, and incorporating a protective cover and balun within a sealed accommodating cavity to enhance radiation efficiency and reduce wind load, while maintaining protection against dust and water.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a radome is added to protect the feeding network and feeding part, then protection against dust and water is improved, but device complexity and wind load increase
Solution Approach 1:
The patent merges the protection function into the existing cavity structure by making the cavity body waterproof and dustproof, and by making the protective cover an integrally formed structure with the radiator. This eliminates the need for a separate radome while maintaining protection against dust and water.
Solution Approach 2:
The cavity structure is given multiple functions: it holds the feeding network, provides mechanical support, and when made waterproof and dustproof, provides environmental protection. This multi-functionality replaces the need for a separate radome.
2Reliability
If a radome is added to protect the feeding network and feeding part, then protection against dust and water is improved, but wind load on the antenna increases
Solution Approach 1:
The protection function is merged into the cavity structure and protective cover, eliminating the need for a separate radome. This reduces the overall surface area exposed to wind, thereby reducing wind load on the antenna.
3Loss of energy
If cascading of coaxial cables is reduced by direct connection, then radiation efficiency is improved, but manufacturing precision requirements increase
Solution Approach 1:
The feeding part is directly connected to the feeding network inside the cavity, merging the connection into a single integrated structure. This eliminates multiple coaxial cable cascades, reducing energy loss and improving radiation efficiency.
4Loss of energy
If antenna size is increased to enhance performance, then radiation efficiency is improved, but wind load and space requirements increase
Solution Approach 1:
The protective cover and radiator are made into an integrally formed structure, eliminating the need for a separate radome. This allows the antenna to be made larger for enhanced performance while the reduced overall structure (without radome) minimizes wind load.
Data Source
AI summary
This application provides an antenna and a base station. The antenna includes a power splitter and a radiating element. The power splitter includes a cavity and a feeding network, and the feeding network is disposed in the cavity. The radiating element includes a radiator, a feeding part, and a protective cover. The feeding part is connected between the feeding network and the radiator, to feed the radiating element. The radiator and the protective cover are fastened together, and the feeding part is located inside the protective cover. The protective cover is fastened to the cavity, the protective cover and a surface of the cavity form an accommodating cavity, and the feeding part is located in the accommodating cavity. The accommodating cavity meets a preset protection rating. The feeding part of the radiating element is directly connected to the feeding network located in the cavity.