Dipole Antenna Balun Feeding Substrate Integration
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Solution Overview
Problem
Current antennas used in wireless terminal devices face a trade-off between high performance and low production costs, with external antennas being expensive, built-in antennas requiring additional brackets, and PCB antennas having performance affected by current on the board.
Innovation Solution
A dipole antenna design featuring first and second radiation arms soldered on a dielectric substrate with a balun for balanced feeding, reducing current flow to the reference ground and improving radiation patterns, while allowing for automatic assembly and reduced production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an external antenna is used, then antenna performance is improved, but production cost increases and fine ID capability deteriorates
Solution Approach 1:
The patent merges the antenna structure with the dielectric substrate by soldering the radiation arms directly to the substrate, eliminating the need for separate external antennas or complex bracket assemblies. This integration achieves both cost reduction and maintained performance.
Solution Approach 2:
The patent introduces a balun as an intermediary component between the feeding point and the radiation arms. The balun provides balanced feeding that reduces current flow to the reference ground, thereby improving radiation pattern quality while maintaining the integrated structure's cost advantages.
2Ease of manufacture
If a built-in bracket antenna is used, then fine ID capability is improved and production cost is reduced, but device complexity increases due to additional brackets
Solution Approach 1:
The patent combines the antenna radiation arms and the dielectric substrate into a single integrated structure, eliminating the need for separate plastic brackets and steel sheet assemblies. This reduction in component count simplifies the device while maintaining low production costs.
3Ease of manufacture
If a PCB printed board antenna is used, then production cost is reduced and fine ID capability is improved, but antenna performance deteriorates due to current interference from the PCB board
Solution Approach 1:
The patent introduces a balun as an intermediary component that provides balanced feeding to the radiation arms. This balun structure reduces the current flowing to the reference ground, thereby minimizing interference from the dielectric substrate and improving radiation pattern quality while maintaining the cost advantages of PCB integration.
Solution Approach 2:
The patent changes the feeding mechanism from unbalanced to balanced feeding through the balun, which fundamentally alters the current distribution characteristics and reduces substrate interference, thereby improving antenna performance.
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 dipole antenna achieves high performance with reduced production costs by using a balun for balanced feeding and minimizing current flow to the reference ground, enhancing antenna performance and competitiveness.
Implementation Method 1
the balun is electrically connected to a feeding point and a reference ground separately, so as to implement balanced feeding for the first radiation arm and the second radiation arm
Implementation Method 2
reduce a current flowing to the reference ground, and further reduce an effect on an antenna radiation pattern
Implementation Method 3
the first radiation arm and the second radiation arm are both soldered on a dielectric substrate, so that the first radiation arm and the second radiation arm can be automatically assembled to the dielectric substrate
Data Source
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AI summary
Embodiments of the present invention disclose a dipole antenna and a wireless terminal device, which relate to communications technologies, and are invented for enabling an antenna to have relatively high performance and a relatively low production cost. The dipole antenna includes a first radiation arm, a second radiation arm, and a balun, where the first radiation arm and the second radiation arm are both soldered on a dielectric substrate, the first radiation arm and the second radiation arm are separately connected to the balun electrically, and the balun is electrically connected to a feeding point and a reference ground separately. The present invention is mainly applied to a terminal device.