Bowl-Shaped Antenna Feed Layout for Stable Low-Band Intermodulation
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Solution Overview
Problem
Traditional low frequency radiation units in antennas suffer from complex wiring and poor intermodulation stability due to terminal-based feeding, leading to inefficient layout and performance issues.
Innovation Solution
A bowl-shaped low frequency radiation unit with detachable first feed baluns and a terminal-free feeding mode, incorporating protective sleeves and a compact design that reduces layout space and enhances intermodulation stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional antenna structure is used, then the device complexity is low, but the antenna cannot be selectively deactivated to reduce interference
Solution Approach 1:
The antenna system is divided into multiple independent antenna elements (first antenna, second antenna, third antenna, fourth antenna) that can be individually controlled and deactivated. This segmentation allows selective deactivation of specific antenna elements to reduce interference in certain directions while maintaining operation of other elements, thereby improving reliability without requiring complete system redesign.
2Area of stationary object
If multiple antennas are deployed for multi-directional coverage, then the coverage area is improved, but interference management becomes more difficult
Solution Approach 1:
The antenna system implements dynamic control where antenna elements can be selectively activated or deactivated based on real-time interference conditions and coverage requirements. The base station controller dynamically adjusts which antennas are operational to optimize the balance between coverage area and interference management, allowing the system to adapt to changing environmental conditions.
3Area of stationary object
If antenna elements are positioned close together, then the device footprint is reduced, but mutual interference between elements increases
Solution Approach 1:
Different antenna elements are assigned different functional characteristics and operational modes. Each antenna element can be independently controlled with specific beamforming patterns, transmission powers, and activation states. This local quality differentiation allows close positioning of elements while managing mutual interference through individualized control strategies for each element.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution achieves a more concise layout, improved intermodulation stability, and better performance indexes, including reduced voltage standing wave ratios and increased gain, while allowing for easy component replacement and cost-effective maintenance.
Implementation Method 1
an antenna 14 and a base station system 16. The base station system 16 may include a plurality of antenna elements 12
Data Source
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AI summary
Provided in the present application are an antenna and a base station system. The antenna comprises: a bowl-shaped low-frequency radiation unit and a low-frequency feed assembly. The bowl-shaped low-frequency radiation unit comprises a base, and two pairs of first dipoles which are orthogonally arranged at ±45° in a polarized manner, and the low-frequency feed assembly comprises two first feed baluns, wherein each pair of first dipoles is correspondingly connected to one first feed balun; and each first feed balun comprises a protective sleeve, an outer conductor, an inner conductor and a dielectric layer, the outer conductor being sleeved at the periphery of the inner conductor, the dielectric layer being arranged between the outer conductor and the inner conductor, and the protective sleeve being sleeved at the periphery of the outer conductor and passing through the base. The low-frequency feed assembly provides input signals for the two pairs of first dipoles, and the feed mode in which a terminal is removed is used, thereby reducing the layout space of the low-frequency feed assembly in an antenna, improving the intermodulation stability of the antenna, and also meeting the requirements of performance indicators.