Display Mesh Antenna Layout for Polarization Isolation
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Solution Overview
Problem
Antennas in electronic devices experience degraded radiation performance and polarization isolation due to peripheral conductors, particularly when a conductive display layer occupies the front surface, leading to challenges in high-frequency communication.
Innovation Solution
The antenna is designed with a conductive mesh pattern on a dielectric sheet, where the inner lengths of conductive lines are arranged to differ based on direction, enhancing polarization isolation and cross-polarization discrimination by altering the shape of the mesh pattern.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the antenna is arranged between the display panel and the front cover for front radiation, then radiation performance in front direction is improved, but the conductive mesh pattern must have portions removed to ensure display visibility, which degrades polarization isolation and cross-polarization discrimination
Solution Approach 1:
The patent applies asymmetry by designing the mesh pattern with different inner lengths in horizontal and vertical directions. Specifically, the inner length of the first line (horizontal) is made longer than the inner length of the second line (vertical), creating an asymmetric mesh structure that compensates for the performance degradation caused by removing mesh portions for display visibility.
2Ease of manufacture
If a symmetric mesh pattern is used in dual polarization feeding structure, then manufacturing is simplified, but polarization isolation and cross-polarization discrimination are degraded due to difference in electrical effective lengths in horizontal and vertical directions
Solution Approach 1:
The patent deliberately introduces asymmetry into the mesh pattern design by setting different inner lengths for horizontal and vertical directions. This asymmetric design counteracts the unwanted difference in electrical effective lengths that would otherwise occur in a symmetric pattern, thereby improving polarization isolation while remaining manufacturable.
Solution Approach 2:
The patent changes the geometric parameters of the mesh pattern, specifically the inner lengths of the conductive lines in different directions. By adjusting these parameters to create an asymmetric pattern, the patent optimizes the electrical characteristics for dual polarization feeding while maintaining manufacturing feasibility.
Data Source
AI summary
An electronic device is provided. The electronic device includes a housing including a front cover, a rear cover facing the direction opposite to that of the front cover, and a lateral member encompassing the space between the front cover and the rear cover, a display panel, a dielectric sheet, a first mesh pattern part formed through a plurality of first conductive lines in the dielectric sheet, and a wireless communication circuit, and which is electrically connected to the first mesh pattern part, wherein the first mesh pattern part is formed so that the inner length of a first line facing a first direction, is longer than the inner length of a second line, and the unit pattern is formed so that the inner length of a third line, is longer than the inner length of a fourth line.