Plastic Radiation Element Structure for Stable Multi-Band Antennas
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Solution Overview
Problem
Multi-band antennas face challenges due to interference between high-band and low-band radiators, affecting radiation characteristics, and require design considerations for radiation performance, shape, size, and manufacturing complexity.
Innovation Solution
A radiation element structure featuring a dielectric portion made of plastic with four-sided symmetrical radiating arms and balun units, which reduces the shape and volume of radiating elements and minimizes connection points, stabilizing radiation characteristics and facilitating manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multi-band antennas use multiple radiating elements for high-band and low-band, then coverage of multiple bands is improved, but mutual interference between radiators degrades radiation characteristics
Solution Approach 1:
The antenna is divided into separate high-band and low-band radiating elements with distinct spatial arrangements. The high-band radiator uses a planar inverted-F structure while the low-band radiator uses a different configuration, segmenting the antenna function to reduce mutual interference while maintaining multi-band coverage capability
Solution Approach 2:
The patent employs three-dimensional spatial separation by positioning the high-band and low-band radiators at different heights and orientations above the ground plane. This dimensional separation in the vertical and angular domains reduces coupling between bands while preserving multi-band operation
2Reliability
If dual-polarized antenna design is implemented to reduce mutual influence, then radiation performance is improved, but design complexity increases due to multiple considerations
Solution Approach 1:
The patent introduces asymmetry in the ground plane configuration and radiator positioning to achieve dual-polarization characteristics. By creating an asymmetric structure with respect to the x and y axes, the antenna naturally supports both horizontal and vertical polarizations without requiring separate symmetric elements, thereby reducing design complexity
Solution Approach 2:
Each radiating element is designed to serve multiple functions simultaneously - providing both high-band and low-band coverage while supporting dual-polarization. This multi-functionality reduces the total number of elements needed compared to traditional separate designs for each band and polarization
Data Source
AI summary
According to an embodiment of the present disclosure, provided is a radiation element structure arranged on a reflective plate, comprising: a radiation unit including a dielectric portion made from plastic material and first to fourth radiation arms arranged in a four-sided symmetrical structure on one surface of the dielectric portion; and a plurality of balun units, including a balun body connecting the reflective plate and the radiation unit, a feed line disposed on the upper surface of the balun body to feed the radiation unit, and a ground disposed on the lower surface of the balun body.