Multiband Antenna Phase-Shifter Layout for Reduced Width
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Solution Overview
Problem
Multi-band antennas face challenges in miniaturization due to increased size and wind resistance, as well as the need for phase shifter adjustment, which complicates beam pointing adjustments and increases visual pollution and load on base station towers.
Innovation Solution
An adjustment apparatus with a drive unit, adjustment rods, a selection unit, and a shift unit, where adjustment rods are classified into two groups arranged along an up-down direction, allowing for compact layout and balanced size, enabling efficient phase adjustment of phase shifters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If adjustment rods are arranged along the first direction for all bands, then the adjustment apparatus can cover all bands, but the antenna width size increases significantly
Solution Approach 1:
The patent introduces a second direction perpendicular to the first direction, arranging adjustment rods in multiple groups along different directions. This dimensional expansion allows the adjustment apparatus to cover multiple bands while maintaining a compact antenna width by distributing adjustment rods across different spatial dimensions rather than concentrating them in a single linear arrangement.
Solution Approach 2:
The adjustment rods are divided into multiple groups, with each group responsible for adjusting phase shifters of specific bands. This segmentation allows independent control of different band adjustments and enables a more compact overall layout by eliminating the need for a single long adjustment mechanism covering all bands.
2Length of moving object
If adjustment rods are arranged in multiple groups along different directions, then the antenna width size is reduced, but the adjustment apparatus structure becomes more complex
Solution Approach 1:
The drive mechanism is designed with universal functionality to control adjustment rods in multiple groups along different directions. The drive shaft can selectively engage with different adjustment rod groups through a switching mechanism, allowing a single drive system to perform multiple adjustment functions rather than requiring separate drive mechanisms for each adjustment rod group.
Solution Approach 2:
A switching mechanism acts as an intermediary between the drive shaft and the multiple adjustment rod groups. This intermediary component enables the drive shaft to selectively transmit power to different adjustment rod groups, simplifying the overall control structure by providing a centralized switching point rather than requiring independent control systems for each group.
3Ease of operation
If phase shifters are adjusted for beam pointing, then the radiation direction can be changed, but the antenna size and wind resistance increase
Solution Approach 1:
The adjustment rods and phase shifters are arranged in a nested or compact configuration where adjustment components are integrated within the antenna structure rather than extending outward. This nesting approach minimizes the external dimensions of the antenna while maintaining the full adjustment capability, thereby reducing wind resistance without compromising beam pointing functionality.
Data Source
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AI summary
Embodiments of this application provide an adjustment apparatus, a multi-band antenna, and a base station, and relate to the field of communications device technologies. The adjustment apparatus includes a drive unit; a plurality of adjustment rods, where the plurality of adjustment rods are configured to be correspondingly connected to a plurality of loads one by one, the plurality of adjustment rods are classified into a first adjustment rod group and a second adjustment rod group that are arranged along an up-and-down direction, the first adjustment rod group and the second adjustment rod group each include a plurality of adjustment rods that are arranged in parallel and at intervals along a first direction, and the first direction is perpendicular to the up-down direction; a selection unit, where the drive unit is configured to drive the selection unit to be connected to at least one adjustment rod in the first adjustment rod group or at least one adjustment rod in the second adjustment rod group; a shift unit, where the shift unit is configured to enable the selection unit to be switched between the first adjustment rod group and the second adjustment rod group; and an adjustment unit, where the drive unit is configured to drive the adjustment unit to drive the adjustment rod connected to the selection unit to move, to drive the corresponding load to move along a direction consistent with an axial direction of the adjustment rod.