Multi-Layer Patch Antenna Layout for Compact Triple-Band Decoupling
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Solution Overview
Problem
Existing antenna technologies struggle to integrate multiple antennas for satellite services, such as GNSS and SDARS, into a single, space-efficient device that can operate across multiple band ranges while maintaining performance and decoupling between bands.
Innovation Solution
A multi-layer patch antenna device comprising a lower, middle, and upper antenna layer, where each layer has a dielectric substrate coated with metal layers, and feed pins are guided through these layers to achieve capacitive connections and efficient signal routing, allowing for triple-band operation without increasing the device's size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple antennas for GNSS and SDARS are integrated into a single device, then space efficiency is improved, but device complexity increases
Solution Approach 1:
The patent transitions from a planar two-dimensional antenna layout to a three-dimensional stacked configuration with multiple layers (first patch antenna layer, second patch antenna layer, third patch antenna layer). This vertical stacking enables multiple antennas to occupy the same horizontal footprint while operating in different spatial planes, thereby reducing the overall device area while managing complexity through structured layering
Solution Approach 2:
The antenna device is segmented into multiple independent patch antenna layers, each designed to operate in specific frequency bands (GNSS L1, L2, L5 and SDARS bands). Each layer functions as a separate antenna element with its own feed structure, allowing independent optimization of each band while maintaining compact integration through the stacked configuration
2Adaptability or versatility
If triple-band operation is achieved in a compact device, then bandwidth is improved, but manufacturing precision requirements increase
Solution Approach 1:
The feed structure is designed with nested hollow pins that pass through multiple dielectric layers and metal patches. The first hollow pin passes through the first and second dielectric layers, the second hollow pin passes through the second and third dielectric layers, and these nested feed structures provide built-in alignment references that guide the positioning of feed pins during manufacturing, thereby reducing precision requirements
Solution Approach 2:
Dielectric layers serve as intermediary elements between the metal patches and feed structures. These dielectric substrates provide mechanical support and electrical isolation while their thickness and material properties are designed to facilitate feed pin insertion and alignment. The dielectric layers act as mediators that accommodate manufacturing tolerances and ensure proper electrical connection across multiple bands
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 a compact, triple-band antenna device that maintains excellent decoupling between GNSS and SDARS bands, improves radiation patterns, and meets the specifications for satellite services, all while reducing the need for additional space and manufacturing complexity.
Implementation Method 1
feed pins are guided through these layers to achieve capacitive connections and efficient signal routing
Data Source
AI summary
The multi-layer patch antenna device comprises a lower antenna layer, a middle antenna layer and an upper antenna layer. An upper metal layer of the middle antenna layer is contacted by two feed pins which are guided through the lower and middle antenna layers. Metal layers of the lower antenna layer are connected to each other via a first hollow pin which is guided through the lower dielectric substrate layer. Metal layers of the middle antenna layer are connected via a second hollow pin which is guided through the middle dielectric substrate layer. An upper metal layer of the upper antenna layer is contacted by a further feed pin which is guided through the antenna layers and is coaxially sheathed by the first hollow pin and the second hollow pin.