PIFA Antenna Module with Plastic Clip for Compact Wireless Devices
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Solution Overview
Problem
Traditional antennas are too bulky for portable devices and have low transmission efficiency, with chip antennas offering only 30-45% efficiency and being susceptible to interference from other metal elements.
Innovation Solution
A compact antenna module with a patch inverse F antenna (PIFA) design, comprising a radiating element, grounding element, connecting element, and feeding point, fixed by a plastic clip portion, allowing for reduced volume and improved transmission efficiency without interference from surrounding metal elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional antenna is used, then the transmission efficiency is improved, but the volume of the device increases
Solution Approach 1:
The antenna body is embedded within the housing structure, with the radiating element, grounding element, and connecting elements integrated into the housing's internal cavity. This nesting approach allows the antenna to occupy space within the existing device volume rather than adding external bulk.
Solution Approach 2:
The antenna utilizes the third dimension (depth) by extending elements vertically within the housing cavity. The radiating element has a height dimension, and the connecting elements extend in the vertical direction, effectively using the Z-axis to achieve adequate antenna length without increasing the device's footprint area.
2Volume of moving object
If a chip antenna is used to reduce volume, then the device volume is reduced, but the transmission efficiency deteriorates to 30-45%
Solution Approach 1:
The antenna design changes key parameters including the length and configuration of the radiating element, the positioning and shape of the grounding element, and the geometry of connecting elements. These parameter adjustments optimize the antenna's resonant frequency and radiation pattern to achieve over 50% transmission efficiency while maintaining a compact form factor suitable for portable devices.
3Volume of moving object
If a chip antenna is used, then the volume is reduced, but the antenna becomes susceptible to interference from other metal elements
Solution Approach 1:
The grounding element is extracted and positioned at a specific location within the housing, separated from other metal elements. The connecting elements are routed to provide electrical connection while maintaining spatial separation from potential interference sources. This extraction and strategic positioning reduces coupling with other metal components and minimizes interference susceptibility.
4Device complexity
If the antenna body is fixed without a fixing part, then the structure is simpler, but the antenna stability deteriorates
Solution Approach 1:
The fixing part integrates multiple functions into a single component: it provides mechanical support for the antenna body, positions the grounding element relative to the housing, and maintains the spatial relationship between antenna components. This merging of functions achieves stable antenna fixation without significantly increasing structural complexity.
Data Source
AI summary
An antenna module for wireless signal transmission of an electronic device is disclosed. The antenna module comprises an antenna body and a fixing part. The antenna body comprises a radiating element, a grounding element, a connecting element, and a feeding point. The radiating element has a first radiating area and a second radiating area. The connecting element has a first end and a second end. The first end is connected with the first radiating area of the radiating element and the second end is connected with the grounding element. The feeding point is disposed on the radiating element and is used to feed a signal. The fixing part comprises a main body and a first clip portion. The main body is used to match the shape of the antenna body. The first clip portion is used to clip and fix the antenna body.