Wilkinson Divider Impedance and Positioning for Antenna Module Size Reduction
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Solution Overview
Problem
The increasing demand for wireless communication in mobile terminals and IoT devices leads to higher communication traffic, which can result in decreased communication speed and quality, and existing antenna modules with built-in dividers are not optimized for size reduction, especially in the context of massive MIMO technology.
Innovation Solution
An antenna module with a multilayer dielectric substrate, featuring a Wilkinson-type divider with a lower impedance circuit system, which is strategically placed closer to the mounting surface to reduce size by minimizing the thickness of the divider and feeder circuits, allowing for more compact designs without compromising signal transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a conventional divider with higher impedance is used in the antenna module, then the signal transmission is stable, but the thickness and size of the antenna module increase
Solution Approach 1:
The patent changes the impedance parameter of the divider from conventional higher impedance (e.g., 50Ω) to lower impedance (e.g., 25Ω). This parameter change allows the divider to be positioned closer to the mounting surface while maintaining signal transmission quality, thereby reducing the overall thickness and size of the antenna module.
Solution Approach 2:
The patent repositions the divider from a conventional location deeper within the dielectric substrate to a location closer to the mounting surface. This spatial repositioning in the thickness dimension enables size reduction while the lower impedance design ensures signal quality is maintained despite the changed position.
2Length of stationary object
If the divider is positioned deeper in the dielectric substrate, then signal transmission is stable, but the antenna module thickness increases
Solution Approach 1:
By changing the impedance parameter of the divider to a lower value, the patent enables the divider to be positioned closer to the mounting surface. This parameter change compensates for the reduced distance from the mounting surface, maintaining signal transmission efficiency while reducing overall module thickness.
3Productivity
If more antenna elements are added for massive MIMO, then communication speed and quality improve, but the antenna module size increases
Solution Approach 1:
The patent repositions the divider closer to the mounting surface, utilizing the space near the surface more effectively. This spatial reorganization allows more antenna elements to be arranged in the available area without increasing the overall module thickness, enabling massive MIMO functionality while maintaining compact size.
Solution Approach 2:
The lower impedance design of the divider reduces the required thickness for proper signal transmission. This parameter change frees up vertical space that can be utilized to accommodate additional antenna elements for massive MIMO applications.
Data Source
AI summary
The present disclosure includes: an RFIC (110A) and an RFIC (110B) that are configured to respectively supply radio-frequency power to a first antenna group and a second antenna group; and a divider that divides a reference frequency signal input thereto and outputs the resulting first radio-frequency signals to the RFIC (110A) and the RFIC (110B). The divider is a Wilkinson-type first divider that is formed of a circuit system of a second impedance that is lower than a first impedance that is an impedance of signal transmission system into which the divider is inserted.