Extruded Antenna with Intersecting Slots for WiFi Bluetooth Coexistence
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Solution Overview
Problem
Existing electronic devices face challenges in coexistent and concurrent operation of WiFi™, Bluetooth®, and ZigBee technologies due to frequency overlap, requiring time-division multiplexing, which leads to degraded wireless signal quality and throughput, and RF shadows within homes.
Innovation Solution
The design of an extruded antenna assembly with intersecting slots and patch antennas that achieve high isolation and concurrent operation by radiating electromagnetic energy in different frequency ranges, reducing RF interference and desense, and allowing for the close placement of audio speakers without degrading wireless signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If time-division multiplexing is used to operate WiFi and WPAN protocols, then frequency overlap interference is reduced, but wireless signal quality and throughput are degraded
Solution Approach 1:
The antenna system is segmented into multiple independent antenna elements, each dedicated to specific protocols (WiFi or WPAN). This physical segmentation allows simultaneous operation of multiple protocols without frequency overlap interference, while maintaining full throughput for each protocol through dedicated antenna resources.
Solution Approach 2:
An antenna selection circuit acts as an intermediary between the radio protocols and antenna elements. This intermediary intelligently routes WiFi signals to WiFi-optimized antennas and WPAN signals to WPAN-optimized antennas, enabling concurrent operation without interference while preserving maximum signal quality and throughput for each protocol.
2Volume of moving object
If audio speakers are placed close to antennas, then device space is optimized, but RF interference and desense are increased
Solution Approach 1:
Different regions of the antenna assembly are designed with different functional qualities. Audio speakers are strategically positioned in regions where they do not interfere with antenna radiation patterns or receive signals. The antenna structure incorporates regions with different electromagnetic characteristics, allowing close placement of speakers in low-interference zones while maintaining high performance in signal-critical zones.
3Device complexity
If multiple protocols share the same antenna, then device complexity is reduced, but concurrent operation capability is lost
Solution Approach 1:
The antenna assembly is designed as a universal structure that can simultaneously support multiple protocols through multiple antenna elements. Each antenna element can be independently activated based on the active protocol, allowing the system to function as WiFi antenna, WPAN antenna, or both concurrently. This multi-functional design achieves concurrent operation capability without proportionally increasing overall device complexity through integrated antenna architecture.
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
Enables simultaneous and efficient operation of WiFi™, Bluetooth®, and ZigBee technologies, improving RF data throughput and range while minimizing interference from audio speakers and high-frequency noise, thus enhancing wireless communication performance.
Implementation Method 1
the first slot antenna to radiate electromagnetic energy in a first frequency range and the second slot antenna to radiate electromagnetic energy in a second frequency range
Data Source
AI summary
An apparatus includes a radio frequency (RF) feed and an extruded member made of metal and coupled to the RF feed. The extruded member includes a first surface that includes a first slot having a first width and a first length, and a second slot having a second width and a second length. The second width is at least 1.2 times greater than the first width. The second slot intersects the first slot at an angle with respect to the first slot that is between 70 and 110 degrees.