Multi-band Antenna Switching Unit for Interference Reduction
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Solution Overview
Problem
Multiple antennas in electronic devices occupy a large area and generate electromagnetic interference, limiting their efficiency in wireless communication.
Innovation Solution
A multi-band antenna system with a switching unit and diplexers that allows for frequency tuning and selective antenna activation, optimizing antenna configuration and reducing interference by enabling multiple frequency bands operation within a compact space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antennas are used for radiating different signal types, then wireless communication capabilities are improved, but the occupied area and electromagnetic interference increase
Solution Approach 1:
The patent combines multiple antenna functions into a single multi-functional antenna structure that can operate across multiple frequency bands (e.g., 700MHz, 1.8GHz, 2.6GHz, 3.5GHz) and support different signal types including LTE, WiFi, and Bluetooth, thereby achieving the functionality of multiple antennas while occupying minimal space
Solution Approach 2:
The antenna is designed with universal multi-functionality to perform multiple wireless communication tasks simultaneously or sequentially, including cellular communication, wireless local area network, and short-range wireless communication, eliminating the need for separate dedicated antennas for each function
2Adaptability or versatility
If multiple antennas are used for radiating different signal types, then wireless communication capabilities are improved, but electromagnetic interference increases
Solution Approach 1:
The patent employs dynamic switching mechanisms that can adjust the antenna's operating frequency band and signal type in real-time based on communication requirements, allowing the system to activate only the necessary frequency bands and thereby reducing electromagnetic interference while maintaining full wireless communication functionality
Solution Approach 2:
The patent introduces switching units and diplexers as intermediary components that manage and separate different signal paths and frequency bands, preventing direct electromagnetic interference between different signal types while enabling the antenna to handle multiple communication protocols simultaneously
3Object-generated harmful factors
If frequency tuning and selective antenna activation are implemented, then electromagnetic interference is reduced, but device complexity increases
Solution Approach 1:
The switching unit and diplexers are designed with multi-functionality to simultaneously perform frequency selection, signal routing, and interference management across multiple frequency bands and signal types, reducing the need for separate dedicated components for each function and thereby limiting the increase in overall device complexity
Data Source
AI summary
An electronic device with multi-band antenna includes a first antenna frame, a second antenna frame, and a switching unit being electrically coupled between the first antenna frame and the second antenna frame. A first feed point only is located on the first antenna frame and multiple electrical connection points, a second feed point, and a ground point are located on the second antenna frame. One end of the first antenna frame can be connected to one of the electrical connection points by controlling the switching unit, and multiple radiating elements, able to radiate signals in different frequency bands, are formed on the multi-band antenna. Radiating elements are formed between the first feed point and the second feed point and the ground point.