Coplanar Waveguide Calibration Circuit for Interference-Shielded Antennas
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Solution Overview
Problem
The increasing complexity and sensitivity to interference in base station antenna systems due to multi-band and MIMO technology integration pose a challenge in achieving high anti-interference performance at a reasonable cost, as existing calibration networks are either complex to manufacture or costly.
Innovation Solution
A calibration device with a dielectric substrate and a metal pattern featuring coplanar waveguide transmission lines, divided into two portions with coplanar ground areas and slots to reduce interference, mounted on a baseplate with a groove to avoid direct contact, and connected via conductive structures, providing a single-layer printed circuit board configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multi-band and MIMO technology are integrated in base station antennas, then wireless communication capacity and throughput are improved, but the antenna system becomes more complicated and more sensitive to interference
Solution Approach 1:
The patent combines the calibration circuit and feed network into a single integrated structure using coplanar waveguide transmission lines printed on a dielectric substrate. This merging of functions reduces the overall system complexity while maintaining multi-band and MIMO capabilities, directly addressing the technical contradiction between adaptability and device complexity
2Adaptability or versatility
If multi-band and MIMO technology are integrated in base station antennas, then wireless communication capacity and throughput are improved, but the antenna system becomes more sensitive to interference
Solution Approach 1:
The patent uses coplanar ground areas and slots to convert potential interference paths into shielding structures. The coplanar ground areas act as electromagnetic shields that block interference from reaching sensitive calibration circuits, while slots provide controlled coupling. This transforms the potential harm of interference into a beneficial shielding mechanism, reducing interference sensitivity while maintaining multi-band and MIMO functionality
3Reliability
If complex calibration networks are used to improve anti-interference performance, then reliability is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent replaces traditional mechanical calibration networks with printed coplanar waveguide transmission lines on a dielectric substrate. This substitution of mechanical assemblies with printed circuit board technology significantly simplifies manufacturing while maintaining anti-interference performance through the inherent shielding properties of the coplanar ground areas and slot structures
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
This configuration enhances the anti-interference performance of the antenna system while maintaining a compact structure and reducing manufacturing complexity and costs, effectively shielding RF signals from external interference.
Implementation Method 1
the first portion and/or the second portion of the calibration circuit are/is constructed as coplanar waveguide transmission lines
Implementation Method 2
a first coplanar ground area and a second coplanar ground area are printed on both sides of at least some of the first conductive traces and at least some of the second conductive traces, respectively
Data Source
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AI summary
A calibration device for an antenna includes a dielectric substrate and a metal pattern printed on the dielectric substrate. The metal pattern includes at least a portion of a calibration circuit, where a first portion of the calibration circuit is on a first major surface of the dielectric substrate, a second portion of the calibration circuit is on an opposed second major surface of the dielectric substrate. The first portion and/or the second portion of the calibration circuit may be constructed as coplanar waveguide transmission lines.