Multi-band Antenna Radiator Integration on Main Board
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional multiband built-in antennas for portable terminals require additional carriers and increased components, leading to higher assembly costs and limited installation space, which hinders the goal of creating a slimmer design while maintaining radiation performance.
Innovation Solution
A multiband built-in antenna design featuring a main board with a ground and non-ground area, where the antenna radiator is directly formed on the non-ground area, branching into two parts for power feeding and grounding, with one end extending in the widthwise direction and the other protruding towards the opposite surface, allowing flexible installation and reducing the number of components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an additional carrier is used to install the antenna radiator, then radiation performance is improved, but the number of components increases and assembly cost increases
Solution Approach 1:
The antenna radiator is directly formed on the main board by extending a conductor pattern from the edge of the ground pattern, eliminating the need for a separate carrier. This merging of the radiator and main board reduces component count while maintaining radiation performance through proper electrical connection to the ground area.
Solution Approach 2:
The main board serves dual functions: as the circuit board for terminal components and as the mounting structure for the antenna radiator. The ground pattern on the main board simultaneously provides electrical grounding and structural support for the radiator, reducing the need for additional dedicated carrier components.
2Reliability
If an additional carrier is used to install the antenna radiator, then radiation performance is improved, but assembly cost increases
Solution Approach 1:
The antenna radiator is integrated directly into the main board manufacturing process by forming a conductor pattern that extends from the edge of the ground pattern. This eliminates the need for separate carrier fabrication and assembly steps, reducing manufacturing complexity and assembly cost while maintaining radiation performance.
3Reliability
If the antenna radiator is installed on a carrier with specific height, then radiation performance is improved, but the terminal thickness increases
Solution Approach 1:
The antenna radiator is formed directly on the main board without requiring a separate carrier with height. The conductor pattern extends within the plane of the main board and connects to the ground area, eliminating the need for additional vertical space that would be required by a traditional carrier-based antenna structure.
4Adaptability or versatility
If the antenna radiator is installed in a limited space near the speaker, then installation flexibility is improved, but the number of components increases
Solution Approach 1:
The antenna radiator is integrated directly into the main board in the limited space near the speaker by extending the conductor pattern within the available area. This eliminates the need for a separate carrier component, reducing overall device complexity while maintaining installation flexibility in the constrained space.
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 design reduces assembly costs, enhances installation flexibility, and maintains radiation performance, enabling a slimmer terminal with improved radiation efficiency comparable to traditional carrier-type antennas.
Implementation Method 1
an antenna radiator having a specific pattern directly formed on the non-ground area of the main board... implementing smooth radiation performance
Data Source
AI summary
A multi-band built-in antenna of a portable terminal is provided. The antenna includes a first antenna radiator on a front surface of a substrate (e.g., a main board), and a second antenna radiator on an opposite surface of the substrate. The substrate has ground surfaces on both sides separated from a non-ground area on which the radiators are disposed. The first radiator may be in the form of a Planar Inverted F Antenna (PIFA), with a first end branched off into two parts, one part used for power feeding and the other part electrically coupled to the ground surface. The first radiator has a portion that extends from the first end to an opposite end. The second radiator is continuous from the opposite end of the first radiator through a via (hole) in the main board.