Antenna Ground Plane Length Adjustment for Handheld Device Bandwidth
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Solution Overview
Problem
The miniaturization of handheld devices limits the space available for antenna elements, affecting their operation bandwidth, and conventional methods to improve this by adding a ground metal sheet consume hardware space and hinder further miniaturization.
Innovation Solution
A handheld device design that includes a first antenna element and a second antenna element disposed along the short and long edges of a ground plane, where the second antenna element adjusts the equivalent ground plane length of the first antenna element, improving its characteristics without requiring additional hardware space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the space in handheld device is reduced for miniaturization, then device size is reduced, but the operation bandwidth of antenna element is influenced (worsened)
Solution Approach 1:
The second antenna element serves dual purposes: it functions as an operational antenna for receiving/transmitting signals, and simultaneously acts as a ground plane adjustment element to extend the equivalent ground plane length for the first antenna element. This multi-functionality allows the device to maintain wide operation bandwidth while achieving miniaturization, as the second antenna element does not require additional dedicated space for ground plane adjustment.
Solution Approach 2:
The invention merges the ground plane adjustment function with the antenna element itself. Instead of using a separate ground metal sheet as in conventional techniques, the second antenna element is electrically connected to the system ground plane and positioned to extend the equivalent ground plane length, thereby combining the antenna function and ground plane adjustment function into a single integrated structure.
2Reliability
If a ground metal sheet is added to improve operation bandwidth, then the operation bandwidth of antenna element is improved, but hardware space is consumed (worsening)
Solution Approach 1:
The second antenna element serves dual purposes: it functions as an operational antenna for receiving/transmitting signals, and simultaneously acts as a ground plane adjustment element to extend the equivalent ground plane length for the first antenna element. This multi-functionality allows the device to maintain wide operation bandwidth while achieving miniaturization, as the second antenna element does not require additional dedicated space for ground plane adjustment.
Solution Approach 2:
The invention merges the ground plane adjustment function with the antenna element itself. Instead of using a separate ground metal sheet as in conventional techniques, the second antenna element is electrically connected to the system ground plane and positioned to extend the equivalent ground plane length, thereby combining the antenna function and ground plane adjustment function into a single integrated structure.
Data Source
AI summary
A handheld device including a ground plane, a first antenna element and a second antenna element is provided. The ground plane includes a short edge and a first long edge adjacent to each other to form a first corner. The first antenna element is opposite to the short edge of the ground plane. The second antenna element is opposite to the first long edge of the ground plane and includes a first radiation portion. An end of the first radiation portion is electrically connected to the first long edge and adjacent to the first corner. The handheld device uses the second antenna element to adjust an equivalent ground plane length of the first antenna element.