Multi-band Antenna Design for Wireless Devices
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Solution Overview
Problem
There is a need for a multi-band antenna design that can operate within the limited space of wireless communication devices while maintaining high isolation and radiation efficiency, and supporting carrier aggregation technology, which is challenging due to the device's compact size and aesthetic considerations.
Innovation Solution
The design incorporates multiple feeding sources with a suitable physical structure that allows for high isolation and radiation efficiency among RF signal sources, utilizing a metal frame with cut points and extension metal pieces to create resonant paths for different frequency bands, and includes active components for impedance matching and frequency adjustability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If multiple separate antennas are used to support carrier aggregation on multiple frequency bands, then the transmission speed and communication performance are improved, but the device size increases and the appearance becomes complicated
Solution Approach 1:
The patent combines multiple antenna functions into a single integrated antenna structure that can simultaneously support multiple frequency bands through carrier aggregation. The antenna uses a shared ground structure and multiple feeding points to achieve multi-band operation without requiring separate antennas for each frequency band, thus maintaining high transmission speed while reducing device size.
Solution Approach 2:
The integrated antenna is designed to perform multiple functions by supporting carrier aggregation across different frequency bands (e.g., 700MHz, 1.8GHz, 2.1GHz, 2.6GHz). The antenna structure can be configured with multiple feeding points and adjustable resonant paths to adapt to different frequency requirements, making a single antenna structure universal for multiple communication bands.
2Reliability
If multiple separate antennas are used to support carrier aggregation, then the communication performance is improved, but the aesthetic appearance and space utilization are worsened
Solution Approach 1:
The patent merges multiple antenna elements into a single integrated structure that maintains excellent communication performance through carrier aggregation while providing a clean, simple appearance. The shared ground structure and unified antenna design eliminate the visual complexity of multiple separate antennas while preserving the ability to simultaneously receive data on multiple frequency bands.
3Device complexity
If the antenna structure is simplified to reduce device complexity, then the manufacturing cost is reduced, but the isolation between multiple RF signal sources deteriorates
Solution Approach 1:
The integrated antenna structure incorporates segmentation by creating distinct resonant paths for different frequency bands through strategic placement of cut points and ground structure divisions. This allows the antenna to maintain high isolation between multiple RF signal sources while using a unified, relatively simple overall structure that reduces manufacturing complexity compared to multiple separate antennas.
4Loss of energy
If the antenna occupies more space to achieve better radiation efficiency, then the radiation efficiency is improved, but the available antenna clearance area is reduced
Solution Approach 1:
The patent combines multiple antenna functions into a single integrated structure that achieves high radiation efficiency across multiple frequency bands within a compact clearance area. The shared ground structure and optimized resonant paths enable efficient radiation without requiring the cumulative space of multiple separate antennas, thus improving radiation efficiency while minimizing the antenna clearance area required.
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
This design effectively shares antenna clearance space, achieves high isolation and radiation efficiency, and allows for real-time frequency adjustments, enhancing the performance of wireless communication devices in supporting multiple frequency bands.
Implementation Method 1
The antenna comprises: a first metal conductor, coupling to the first feeding point and extending toward a lateral direction; and a second metal conductor, coupling to the second feeding point and extending toward a longitudinal direction
Data Source
AI summary
A wireless communication device is provided. The wireless communication device includes a housing, a circuit board, a radio frequency module and an antenna. The housing has a frame and a back cover to define a receiving space. The circuit board is disposed in the receiving space, and defines a clearance area from the housing in the receiving space. The circuit board includes a ground terminal, a first feeding point, and a second feeding point. The antenna includes at least one metal conductor coupled to the first feeding point and the second feeding point, respectively, to provide a low frequency resonant path, a first middle frequency resonant path, a second middle frequency resonant path and a high frequency resonant path.