Base Station Antenna Phase-Slope Layout for Lower Feed Loss
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Solution Overview
Problem
Existing base station antennas face difficulties in simplifying feeder cabling layout and reducing feed network loss due to the need for consistent feeder lengths to maintain radiation phase relationships, which complicates the layout and increases losses.
Innovation Solution
The base station antenna design includes antenna modules with adjustable sub-radiation phase slopes and feeders, allowing for different feeder lengths to meet preset phase differences, simplifying the layout and reducing network loss while ensuring normal radiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If feeder lengths are made consistent to maintain radiation phase relationships, then radiation performance is ensured, but feeder cabling layout complexity increases and feed network loss increases
Solution Approach 1:
The patent applies local quality by allowing different feeder lengths for different antenna units based on their specific positions and radiation requirements. Each antenna unit's feeder is designed with locally optimized length to achieve the required radiation phase relationship without forcing uniform lengths across all units. This resolves the contradiction by maintaining radiation performance through localized optimization rather than global uniformity.
Solution Approach 2:
The patent changes the parameter of feeder length from a fixed consistent value to variable values optimized for each antenna unit's position and radiation characteristics. By adjusting feeder lengths as variable parameters rather than fixed parameters, the system achieves both radiation performance requirements and simplified cabling layout.
2Reliability
If feeder lengths are extended to meet consistent length requirements, then radiation phase relationships are maintained, but feed network loss increases
Solution Approach 1:
The patent applies local quality by designing feeder lengths that are locally optimized for each antenna unit's position and radiation requirements rather than using uniform extended lengths. Each feeder's length is determined by its specific location and the radiation phase relationship requirements, avoiding unnecessary extensions and reducing overall feed network loss.
Solution Approach 2:
The patent inverts the conventional approach by not extending all feeders to a common length, but rather designing each feeder with its optimal length. Instead of forcing feeders to meet a minimum length requirement, the system allows feeders to be as short as needed while maintaining radiation phase relationships through other means, thereby minimizing energy loss.
3Device complexity
If feeder lengths are varied to simplify layout, then feeder cabling layout is simplified and loss is reduced, but radiation phase relationships may be compromised
Solution Approach 1:
The patent applies local quality by optimizing each feeder's length according to its specific position and radiation requirements. This localized optimization allows feeders to have different lengths that simplify the overall cabling layout while simultaneously maintaining the required radiation phase relationships through position-specific design.
Solution Approach 2:
The patent changes feeder length from a fixed parameter to a variable parameter that is optimized for each antenna unit. By allowing feeder length to vary as a design parameter rather than fixing it to a constant value, the system achieves both simplified layout and maintained radiation performance through optimized parameter selection.
Data Source
AI summary
A base station antenna is disclosed. The base station antenna includes a feed mechanism and at least one antenna module. Each antenna module includes at least two antenna units, and each antenna unit has a first sub-radiation phase slope. In each antenna module, first sub-radiation phase slopes of the at least two antenna units are different, and each antenna unit is connected to the feed mechanism through a corresponding feeder that is in a one-to-one correspondence with the antenna unit, where the feeder has a second sub-radiation phase slope. The antenna unit and the corresponding feeder form one radiating element, and a radiation phase slope of each radiating element is a sum of the first sub-radiation phase slope of the antenna unit and the second sub-radiation phase slope of the corresponding feeder.