PIFA Antenna Ground Pad Connection for Radiation Efficiency
Solution Overview
Problem
PIFA type antennas face challenges in securing radiation efficiency and performance due to limited effective volume, especially in slimmed electronic devices where space for the antenna is scarce.
Innovation Solution
An electronic device with a PIFA type antenna, a wireless communication unit, a printed circuit board with a ground area, a power feeding pad, and a connection section that forms an electric route between the power feeding pad and the ground pad, optimizing the antenna's radiation performance without increasing its effective volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the PIFA type antenna is made large in size to increase effective volume, then radiation efficiency is improved, but device compactness deteriorates
Solution Approach 1:
The patent utilizes the ground area on the printed circuit board as a three-dimensional extension of the antenna system. By creating an electric route connection between the power feeding pad and ground pad that extends vertically through the device thickness, the antenna effectively uses the Z-dimension (depth) to increase its effective volume without increasing its footprint area, thereby improving radiation efficiency while maintaining compact form factor.
Solution Approach 2:
The patent introduces a connection section as an intermediary element that forms an electric route between the power feeding pad and ground pad. This connection section acts as a mediator that extends the antenna's effective volume by utilizing the ground area and creating additional current paths, thereby improving radiation performance without requiring a larger antenna structure.
2Reliability
If the effective volume of PIFA type antenna is increased to improve radiation performance, then radiation efficiency is improved, but ease of mounting deteriorates
Solution Approach 1:
The patent merges the antenna structure with the existing printed circuit board ground area and power feeding pad. By combining the PIFA antenna with the PCB's ground structure and utilizing the connection section to form an electric route, the design integrates multiple functions into a unified structure, improving radiation performance while maintaining ease of mounting as no additional separate components are required.
Solution Approach 2:
The ground area and connection section serve multiple functions: they provide the reference plane for the PIFA antenna, create additional current paths to extend effective volume, and maintain electrical connectivity within the device. This multi-functionality allows the same structural elements to simultaneously improve radiation performance without complicating the mounting process.
3Ease of manufacture
If the antenna structure is simplified to reduce device complexity, then ease of manufacture is improved, but radiation efficiency deteriorates
Solution Approach 1:
The patent employs the existing ground area and power feeding pad structures to serve the dual purpose of PCB functionality and antenna operation. The connection section utilizes the available ground structure to create extended current paths, allowing the antenna system to improve its own radiation efficiency using resources already present in the device without requiring additional complex components or structures.
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
The solution enhances radiation efficiency and performance of the PIFA type antenna, improving signal transmission and reception in electronic devices without increasing the antenna's size, as demonstrated by improved Standing Wave Ratio (SWR) and radiation efficiency measurements across various frequency bands.
Implementation Method 1
a PIFA (Planar Inverted-F Antenna) type antenna which is transmitting or receiving a wireless signal
Implementation Method 2
a connection section which forms an electric route between the power feeding pad and the ground pad
Data Source
AI summary
Various exemplary embodiments of the present disclosure relate to an electronic device with a Planar Inverted-F Antenna (PIFA) type antenna and a wireless signal transmitting/receiving device of the electronic device. The electronic device may include: a PIFA (Planar Inverted-F Antenna) type antenna which is transmitting or receiving a wireless signal; a wireless communication unit which is processing the transmitted or received wireless signal; a printed circuit board which is mounted with the wireless communication unit and includes a ground area; a power feeding pad which is electrically connected with a signal transmitting/receiving terminal of the wireless communication unit, and connected with a power feeding section of the PIFA type antenna when the PIFA type antenna is equipped in the electronic device; a ground pad which is electrically connected with the ground area, and connected with a ground section of the PIFA type antenna when the PIFA type antenna is equipped in the electronic device; and a connection section which forms an electric route between the power feeding pad and the ground pad. Meanwhile, various exemplary embodiments may be made based on a technical idea of the present disclosure.