Ultra-Wideband Antenna Switching for Compact Multi-Signal Coverage
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Solution Overview
Problem
The limited space in small-sized electronic devices poses a challenge for ultra-wideband antennas, as they need to support multiple radio frequency signals, leading to compromised transmission performance due to the requirement for multiple antennas, which reduces signal receiving and transmission efficiency.
Innovation Solution
An ultra-wideband antenna device with a switch module that selectively activates different antennas to optimize pattern coverage without increasing the antenna size, using a combination of radio frequency terminals, antenna modules, and a switch module to manage antenna usage for distance measurement and positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antennas are disposed inside the electronic device to support multiple radio frequency signals, then the support for multiple signals is improved, but the space inside the electronic device is reduced and transmission performance is compromised
Solution Approach 1:
The ultra-wideband antenna is designed to perform multiple functions: it serves as both a positioning antenna and a distance measurement antenna, and can support multiple radio frequency signals (4G, 5G, WiFi) through frequency selective surfaces. This multi-functionality eliminates the need for separate antennas for each function, thereby saving space while maintaining versatility.
Solution Approach 2:
The patent combines the positioning antenna and distance measurement antenna into a single ultra-wideband antenna structure. Additionally, the frequency selective surfaces are integrated with the antenna structure to enable multi-frequency support. This merging of functions into a single component reduces the total number of antennas required and optimizes space utilization.
2Volume of stationary object
If the size of the ultra-wideband antenna is compressed to fit small-sized electronic devices, then the space constraint is improved, but the transmission performance of the antenna is adversely affected
Solution Approach 1:
Frequency selective surfaces are strategically positioned at specific locations around the ultra-wideband antenna to control radiation patterns in different directions. These localized modifications allow the antenna to maintain optimal transmission performance in critical directions while keeping the overall antenna size compressed for small electronic devices.
Solution Approach 2:
The antenna system dynamically switches between different radiation patterns using the frequency selective surfaces based on the operational mode (positioning or distance measurement). This dynamic adaptation allows the compressed antenna to maintain optimal transmission performance for the currently active function, compensating for the size reduction.
3Volume of stationary object
If a single ultra-wideband antenna is used for both positioning and distance measurement, then the space usage is improved, but the pattern coverage is insufficient
Solution Approach 1:
Frequency selective surfaces are applied at specific locations on the ultra-wideband antenna to create directional radiation patterns. By strategically placing these surfaces, the antenna can generate different beam directions and coverage patterns, enabling a single antenna to provide comprehensive pattern coverage for both positioning and distance measurement functions.
Solution Approach 2:
The system periodically switches between different radiation patterns generated by the frequency selective surfaces depending on the operational requirements. This periodic switching of patterns allows the single ultra-wideband antenna to effectively cover the necessary spatial patterns for both positioning and distance measurement, maintaining versatility despite using one antenna.
Data Source
AI summary
An ultra-wideband antenna device is disposed on a casing of an electronic device. The ultra-wideband antenna device includes radio frequency terminals, a first antenna module, a second antenna module, and a switch module. The radio frequency terminals, the first antenna module and the switch module are located in the casing. The first antenna module is located on a metal frame of the casing, and the first antenna module includes a first antenna. The second antenna module includes a second antenna, a third antenna, and a fourth antenna. The switch module is connected between the radio frequency terminals and the first antenna module. When the switch module turns on one of the radio frequency terminals and the first antenna for distance measurement, the switch module selectively turns on at least one of the second antenna, the third antenna, or the fourth antenna.