Compact Antenna Device for Concurrent WLAN and Bluetooth Signals
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Solution Overview
Problem
Existing multi-frequency antennas for portable information terminals face issues with interference and size constraints when simultaneously operating multiple frequency signals, such as WLAN and Bluetooth, requiring complex structures and increased antenna volume.
Innovation Solution
A compact antenna device with a meander-shaped antenna element, featuring separate feed terminals for different frequency signals and a grounding terminal at the center, allowing concurrent feeding of radio-frequency signals without interference, thereby reducing antenna size and placement area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate antennas are provided for WLAN and BT, then interference between antennas is avoided, but the antenna placement area increases
Solution Approach 1:
The patent combines WLAN and BT antenna functions into a single antenna element. The antenna element is configured to support both 2.4GHz (BT) and 5GHz (WLAN) frequency bands simultaneously, eliminating the need for separate antennas and reducing placement area while maintaining interference avoidance through proper frequency separation
2Productivity
If a dual-band antenna structure is used for simultaneous WLAN and BT operation, then concurrent feeding is enabled, but the antenna structure becomes complicated and volume increases
Solution Approach 1:
The antenna element is designed as a universal structure that can operate in multiple frequency bands (2.4GHz and 5GHz) simultaneously. By configuring the antenna element with appropriate dimensions and using a single feed terminal that supports wideband operation, the patent achieves concurrent WLAN and BT feeding without requiring complex dual-band structures like inverted-F antennas or multiple feed lines
3Volume of stationary object
If antenna elements are placed close together, then antenna volume is reduced, but interference between antenna elements increases
Solution Approach 1:
The patent changes the operating frequency parameter to resolve interference. By operating WLAN at 5GHz and BT at 2.4GHz with sufficient frequency separation, the patent enables compact antenna placement while minimizing mutual interference through frequency domain isolation rather than spatial separation
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 enables sharing of a single antenna element for multiple frequency signals, reducing antenna size and interference, and saving space in portable information terminals while maintaining effective antenna performance.
Implementation Method 1
an antenna element 11 having both end parts 11a, 11b... capable of feeding a second radio-frequency signal different from the first radio-frequency signal concurrently with the first radio-frequency signal
Data Source
AI summary
An antenna device includes a feed terminal configured to feed a first radio-frequency signal at one end part of an antenna element having both end parts, a feed terminal capable of feeding a second radio-frequency signal concurrently with the first radio-frequency signal at the other end part, and a grounding terminal configured to connect to a grounding point at a substantially center part. Based on this, signals in plural frequency bands are allowed to be concurrently used in common in one antenna element.