Multilayer Patch Antenna for Compact Multi-Band Reception
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional shark fin antennas face challenges in accommodating both GPS and GLONASS antennas due to limited space, leading to increased production costs and difficulty in designing antennas that can receive both signals simultaneously with other frequency bands like SDARS, Telematics, FM, and T-DMB.
Innovation Solution
A multilayer-type patch antenna design where GPS and GLONASS antennas are stacked, with specific through holes and feeding pins arranged at predetermined angles, allowing for compact size and low production cost, enabling reception of all GPS, GLONASS, and SDARS signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antennas for GPS, GLONASS, SDARS, Telematics, FM, and T-DMB are mounted in a shark fin antenna, then signal reception capability across multiple frequency bands is improved, but the device complexity and production cost increase due to limited mounting area
Solution Approach 1:
The patent transitions from a planar two-dimensional antenna layout to a three-dimensional multilayer stacked structure. Multiple patch antennas are arranged in vertical layers with specific spacing, allowing GPS, GLONASS, and SDARS antennas to coexist without occupying additional horizontal space. This dimensional change resolves the contradiction by enabling multi-band reception while maintaining a compact form factor.
Solution Approach 2:
The patent implements a nested configuration where multiple antenna elements are integrated within a single shark fin antenna structure. The GPS patch antenna, GLONASS patch antenna, and SDARS patch antenna are nested in different layers, with each antenna element contained within the overall antenna housing. This nesting approach reduces device complexity by consolidating multiple functions into one integrated unit.
2Reliability
If separate production lines are used for GPS-only and GLONASS-only shark fin antennas, then antenna performance for specific frequency bands is optimized, but production cost increases
Solution Approach 1:
The patent designs a universal shark fin antenna structure that can simultaneously support GPS, GLONASS, and SDARS reception. The multilayer patch antenna configuration allows a single production line to manufacture antennas capable of receiving multiple frequency bands. This universality eliminates the need for separate production lines while maintaining optimized performance for each frequency band through carefully designed patch antenna geometries and spacing.
3Measurement precision
If conventional patch antennas designed for GPS frequency band are used, then GPS signal reception is optimized, but GLONASS signal reception is not achieved due to frequency band limitations
Solution Approach 1:
The patent applies local quality by designing different patch antenna elements with specific geometric characteristics optimized for their respective frequency bands. The GPS patch antenna has dimensions and spacing optimized for 1576 MHz, while the GLONASS patch antenna has different dimensions optimized for 1602 MHz. Each antenna element maintains its specialized design for optimal performance in its target frequency band while coexisting in the multilayer structure.
Data Source
AI summary
Disclosed is a multilayer-type patch antenna including: an upper patch antenna portion having a first through hole and a second through hole which are at a predetermined angle; a lower patch antenna portion having a third through hole and a fourth through hole which are at a predetermined angle, and a fifth through hole which is spaced from the third through hole and the fourth through hole; a first feeding pin which passes through the first through hole and the third through hole and protrudes from a lower end of the lower patch antenna portion; a second feeding pin which passes through the second through hole and the fourth through hole and protrudes from the lower end of the lower patch antenna portion; and a third feeding pin which passes through the fifth through hole and protrudes from the lower end of the lower patch antenna portion.