Built-in Multi-Antenna Module for Wireless Routers
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Solution Overview
Problem
Existing wireless LAN antennas have aesthetic and space occupancy issues due to external structures, and dual-band antennas require additional components like diplexers, increasing cost and power loss.
Innovation Solution
A built-in multi-antenna module with alternately and symmetrically arranged first and second radiating units on a grounding unit, allowing for concurrent dual-band operation without external diplexers, and enabling the module to be hidden within a router for improved aesthetics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If external dipole antennas are used for wireless LAN operation, then the antenna structure is simple and easy to manufacture, but the antenna occupies space and deteriorates the aesthetic appeal of the product
Solution Approach 1:
The patent embeds the antenna structure within the router housing. The radiating elements are positioned inside the enclosure, with the ground plane formed by the router's metal chassis. This nesting approach hides the antenna components, improving aesthetic appeal while maintaining functional performance.
2Volume of moving object
If a dual-band antenna with single signal feeding port is used, then the antenna structure is compact, but additional diplexers are required which increase cost and power loss
Solution Approach 1:
The patent employs separate radiating elements for 2.4 GHz and 5 GHz bands. Each element is independently fed through dedicated feeders connected to corresponding wireless modules. This segmentation eliminates the need for diplexers, reducing system complexity and power loss while maintaining compact form factor.
Solution Approach 2:
The router's metal housing serves multiple functions: it provides structural support, electromagnetic shielding, and acts as the ground plane for the antenna system. This multi-functionality reduces the need for separate ground plane components, maintaining compactness without increasing complexity.
3Reliability
If traditional dipole antennas with plastic or rubber sleeve covering are used, then the antenna is protected from environmental damage, but the cost is increased
Solution Approach 1:
The router's metal housing serves as both the enclosure and the ground plane for the antenna. This eliminates the need for separate protective sleeves and ground plane components, reducing manufacturing cost while maintaining protection and electromagnetic performance.
Solution Approach 2:
The patent combines the ground plane function with the router's existing metal chassis. By merging these functions, the design eliminates additional protective components and ground plane materials, reducing cost while maintaining reliability.
4Reliability
If stack structure dual antenna system is used for dual-band operation, then the antenna achieves good radiation properties, but the height of the whole antenna structure is high
Solution Approach 1:
The patent transitions from a vertical stack configuration to a planar arrangement where radiating elements are positioned side-by-side within the router's horizontal space. The ground plane is formed by the router's base, allowing elements to be distributed in the x-y plane rather than stacked in the z-direction, thus reducing height while maintaining radiation 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 solution provides a compact, low-profile design with good radiation properties and isolation, reducing mutual coupling between frequency bands and eliminating the need for diplexers, thus enhancing the appearance and performance of wireless devices.
Implementation Method 1
Each first radiating unit has a first radiating body parallel to the surface of the grounding unit... Each second radiating unit has a second radiating body parallel to the surface of the grounding unit
Implementation Method 2
a first shorting pin being extended downwards from one side of the first radiating body and being connected to the grounding unit... a second shorting pin being extended downwards from one side of the second radiating body and being connected to the grounding unit
Data Source
AI summary
A built-in multi-antenna module includes a grounding unit, a plurality of first radiating units and a plurality of second radiating units. The first and the second radiating units are disposed on the grounding unit. Each first radiating unit has a first radiating body, a first feeding pin extended downwards from the first radiating body, and a first shorting pin extended downwards from the first radiating body and connected to the grounding unit. Each second radiating unit has a second radiating body, a second feeding pin extended downwards from the second radiating body, and a second shorting pin extended downwards from the second radiating body and connected to the grounding unit. The first radiating units and the second radiating units are alternately and symmetrically arranged on the grounding unit, and many included angles respectively formed between each first radiating unit and each second radiating unit are the same.