Modified-Material Combined Antenna for Dual-Band Positioning Accuracy
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Solution Overview
Problem
Current satellite navigation antennas face limitations in achieving high-precision positioning due to their reliance on single frequency bands, necessitating the development of dual-band capable receivers for improved accuracy and wider applicability.
Innovation Solution
A modified-material-based high-precision combined antenna is designed, utilizing injection molded substrates made of polyphenyl ether doped with a modified material, integrated through electroplating, which includes high-frequency and low-frequency satellite navigation antenna metal radiating surfaces, a WIFI/Bluetooth antenna, and an amplifying filter circuit, reducing production costs and enhancing signal strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single frequency band antenna is used, then the manufacturing cost is low, but the positioning accuracy is limited
Solution Approach 1:
The patent combines high-frequency and low-frequency satellite navigation antenna functions into a single integrated antenna structure. The substrate integrates both high-frequency radiating elements and low-frequency radiating elements, allowing dual-band signal reception without requiring separate antennas, thus improving positioning accuracy while controlling structural complexity
Solution Approach 2:
The integrated antenna substrate serves multiple functions: it acts as both the high-frequency antenna substrate and low-frequency antenna substrate, provides grounding for both frequency bands, and supports both high-frequency and low-frequency radiating elements. This multi-functionality enables dual-band operation with a single component, resolving the contradiction between accuracy improvement and complexity increase
2Measurement precision
If dual-band antenna reception is implemented, then the positioning accuracy improves, but the production cost increases
Solution Approach 1:
The patent merges dual-band antenna functions into a single integrated substrate structure that can be manufactured using standard PCB fabrication processes. By combining high-frequency and low-frequency antenna elements on one substrate with shared grounding, the design enables dual-band reception without requiring separate antenna assemblies, thereby controlling production costs while achieving improved positioning accuracy
Solution Approach 2:
The patent uses parameter changes in the substrate design, including specific dielectric constant values (2.65 for high-frequency layer, 3.37 for low-frequency layer) and controlled impedance configurations, to optimize both high-frequency and low-frequency performance within a single manufacturable structure, achieving dual-band accuracy without proportionally increasing production cost
3Reliability
If traditional antenna substrates are used, then the manufacturing process is simple, but the signal strength is insufficient
Solution Approach 1:
The patent employs composite substrate construction with different dielectric materials optimized for different frequency bands: a high-frequency substrate layer with dielectric constant 2.65 for L1/L5 bands, and a low-frequency substrate layer with dielectric constant 3.37 for L-band. This composite approach enhances signal strength for both frequency bands while maintaining a relatively simple integrated structure that avoids excessive complexity
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 enables cost-effective mass production of high-precision antennas suitable for satellite navigation and communications, achieving improved satellite signal strength and broader applicability across various fields, including surveying and mapping.
Implementation Method 1
the modified material has a relative permittivity of 2.65 and a density of 1.06 g/cm3
Implementation Method 2
the combined antenna is integrally formed through an electroplating process
Data Source
AI summary
A modified-material-based high-precision combined antenna for satellite navigation and communications includes a high-frequency satellite navigation antenna metal radiating surface, a low-frequency satellite navigation antenna metal radiating surface, a WIFI/Bluetooth antenna metal radiating surface, a PCB, a shielding metal cavity and an injection molded modified-material-based substrate. The low-frequency satellite navigation antenna metal radiating surface is located between the high-frequency satellite navigation antenna metal radiating surface and the PCB. The WIFI/Bluetooth antenna metal radiating surface is located on a side of the low-frequency satellite navigation antenna metal radiating surface. The injection molded modified-material-based substrate is made of polyphenyl ether doped with a modified material, and the modified material has a relative permittivity of 2.65 and a density of 1.06 g/cm3. The injection molded modified-material-based substrate includes a first injection molded modified-material-based substrate and a second injection molded modified-material-based substrate.