Mobile Antenna Layout With Outer Openings to Prevent Wave Reflection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The integration of 5G antennas with 4G antennas in mobile terminals poses a challenge due to radiation wave reflections, where the 5G antennas are either obstructed by the 4G antenna casing or require increased terminal size to avoid interference, degrading the 4G antenna characteristics.
Innovation Solution
The solution involves arranging the 5G antennas on the outer side of the casing with openings in the radiation direction of the 4G antennas, allowing radiation waves to pass through without reflection, and using patch antennas with dual-polarization for efficient communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the 5G antenna is arranged inside the metal member surrounding the mobile terminal, then the terminal size is reduced, but radiation waves from the 5G antenna are reflected by the 4G antenna structure
Solution Approach 1:
A feed hole is introduced as an intermediary structure in the metal member to allow 5G radiation waves to pass through to the 5G antenna while maintaining the shielding function for 4G frequencies. This mediator structure enables coexistence of both antenna systems without direct interference.
2Object-generated harmful factors
If the 5G antenna is arranged outside the 4G antenna, then radiation wave reflection is avoided, but the terminal size increases and 4G antenna characteristics are degraded
Solution Approach 1:
The 5G antenna is nested within the structure formed by the metal member and feed hole configuration, allowing it to be positioned effectively without increasing overall terminal dimensions. The feed hole creates a nested pathway for 5G waves through the 4G antenna structure.
3Reliability
If the metal member is configured to surround the outer periphery of the mobile terminal for 4G antenna function, then 4G antenna characteristics are optimized, but it causes reflection of 5G radiation waves
Solution Approach 1:
The metal member is designed with differentiated local properties: it maintains continuous shielding structure for 4G frequency optimization while incorporating a feed hole at the specific location where 5G radiation needs to pass through. This local modification allows dual-frequency coexistence without compromising 4G performance.
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 configuration prevents radiation wave reflections inside the casing, maintains the size and performance of the 4G antennas, and enables effective 5G communication by allowing radiation waves to be directed outward, ensuring coexistence of both frequency bands without interference.
Implementation Method 1
a second antenna that is arranged on an outer side of a casing relative to the first antenna, that operates at a second frequency lower than the first frequency, and that includes an opening in a radiation direction of the first antenna
Data Source
AI summary
[Problem] To prevent radiation waves from being reflected inside a casing when a plurality of antennas compatible with different frequencies are mounted. [Solution] According to the present disclosure, provided is an antenna apparatus including a first antenna that operates at a first frequency, and a second antenna that is arranged on an outer side of a casing relative to the first antenna, that operates at a second frequency lower than the first frequency, and that includes an opening in a radiation direction of the first antenna.