Vibrator Antenna Unit With Filtering Branches for Better Isolation
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Solution Overview
Problem
Current base station antennas face challenges in achieving optimal performance indicators across multiple sub-bands, particularly in terms of isolation and decoupling.
Innovation Solution
A vibrator antenna unit is designed with a support base, multiple vibrator arms extending outward, and a leading member at the top. Each vibrator arm features a conductive layer with hollowed-out filtering branches, enhancing isolation and decoupling when combined with the leading member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional base station antenna structures are used, then the antenna can operate across multiple frequency bands, but the isolation and decoupling performance in each sub-band deteriorates
Solution Approach 1:
The antenna element is divided into multiple independent segments (first antenna element and second antenna element) with distinct resonant frequencies. Each segment can be independently optimized for specific frequency sub-bands, allowing the overall antenna to achieve good isolation and decoupling performance across different sub-bands while maintaining multi-frequency operation capability.
Solution Approach 2:
Different portions of the antenna structure are designed with different electrical characteristics. The first antenna element has specific length and configuration optimized for one sub-band, while the second antenna element has different dimensions optimized for another sub-band. This local differentiation enables each element to contribute to isolation in its optimized frequency range while the combination provides broadband operation.
2Volume of moving object
If the vibrator arms are placed close together to reduce antenna size, then the compactness improves, but the isolation between adjacent vibrator arms deteriorates
Solution Approach 1:
A decoupling structure is introduced as an intermediary element between the first and second antenna elements. This decoupling structure acts as a mediator that blocks or attenuates the electromagnetic coupling between adjacent vibrator arms, maintaining good isolation even when the arms are placed in close proximity to achieve compact antenna dimensions.
Solution Approach 2:
The antenna elements are designed with asymmetric configurations where the first antenna element and second antenna element have different lengths, widths, or geometric arrangements. This asymmetry creates different current distribution patterns and resonant characteristics, which helps reduce mutual coupling between adjacent elements and improves isolation in compact configurations.
Data Source
AI summary
The embodiment of the present disclosure provides a vibrator antenna unit and an antenna, wherein the vibrator antenna unit includes a support base, vibrator arms and a leading member arranged on the support base. The vibrator arms extend outward from the center axis of the vibrator antenna unit and are spaced apart from each other. Each vibrator arm includes a conductive layer and a solder resist layer, and the conductive layer is hollowed out to form multiple filtering branches. The leading member is located at the top of the vibrator antenna unit and has a space with multiple vibrator arms. Therefore, the vibrator antenna unit may improve isolation and achieve better decoupling effect through the vibrator arms with the filtering branches in conjunction with the leading member.