Dual-Layer Ceramic Circular Polarization Antenna
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Solution Overview
Problem
Current circular polarization antennas with single-layer substrates have low zenith gain and unstable conductivity due to compression from external forces, which is inadequate for high-frequency applications like SDARS.
Innovation Solution
A dual-layer ceramic circular polarization antenna structure is developed, comprising a first and second hard dielectric body with metal layers, a grounding layer, and an adhesive element, where the antenna feed pin passes through the first dielectric body and is extended outwards, with the second dielectric body firmly adhered on top using an adhesive element, enhancing structural stability and conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-layer substrate is used for circular polarization antenna, then the device complexity is reduced, but the zenith gain is low and conductivity stability is poor
Solution Approach 1:
The antenna substrate is divided into two separate ceramic layers (first hard dielectric body and second hard dielectric body) stacked vertically. Each layer contains metal patterns that work together to form the complete antenna structure, with the feed pin passing through the first layer to connect the metal patterns across layers. This segmentation allows each layer to contribute to both mechanical support and electromagnetic function, improving conductivity stability while maintaining manageable complexity through modular construction.
Solution Approach 2:
The antenna uses composite construction combining hard dielectric ceramic materials with metal layers (copper or aluminum). The ceramic provides mechanical strength and electrical insulation, while the metal layers provide conductive paths. The adhesive element bonds the ceramic layers and metal patterns together, creating a composite structure that leverages the advantages of each material: ceramic for stability and metal for conductivity, thereby improving overall reliability.
2Ease of manufacture
If copper foil is pasted on single-layer antenna by foamed plastic, then the antenna can be manufactured, but the conductivity becomes unstable under external compression
Solution Approach 1:
Instead of using a single foamed plastic layer to hold copper foil, the invention segments the support structure into two rigid ceramic layers with metal patterns directly formed or attached to each layer. The feed pin passes through the first ceramic layer to establish electrical connections between layers. This segmentation eliminates the compression-sensitive foamed plastic-copper foil interface while maintaining manufacturability through standard ceramic processing and bonding techniques.
Solution Approach 2:
The invention replaces the mechanical compression-based assembly (foamed plastic holding copper foil) with a rigid bonded structure. Ceramic layers are bonded using adhesive elements and mechanical interlocking features, creating a stable structure that resists external compression forces. This substitution of the mechanical assembly method eliminates the conductivity instability caused by compression while preserving ease of manufacture through established ceramic bonding processes.
3Device complexity
If single-layer substrate is used for circular polarization antenna, then the manufacturing process is simplified, but the bandwidth and zenith gain are insufficient for SDARS
Solution Approach 1:
The invention transitions from a single-layer planar structure to a three-dimensional stacked configuration with two ceramic layers. The metal patterns on each layer are positioned at different heights and orientations, creating a more complex electromagnetic field distribution that enables broader bandwidth operation and higher zenith gain. This dimensional change allows the antenna to meet SDARS performance requirements while keeping the manufacturing process relatively simple through standardized multi-layer ceramic fabrication techniques.
Data Source
AI summary
A circular polarization antenna structure with a dual-layer ceramic includes a first hard dielectric body, a first metal layer, a grounding layer, an antenna feed pin, a second hard dielectric body, a second metal layer and an adhesive element. The first metal layer and the grounding layer dispose on a top surface and a bottom surface of the first hard dielectric body. The antenna feed pin passes through the through hole of the first hard dielectric body, the top side of the antenna feed pin is fixed on the top surface of the first hard dielectric body, and the bottom side of the antenna feed pin extends outwards from the bottom surface of the first hard dielectric body. The second hard dielectric body disposes above the top side of the first hard dielectric body. The second metal layer disposes on the top surface of the second hard dielectric body.