Nickel-Phosphorus Transmission Path Structure for Low 8+ GHz Loss
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Solution Overview
Problem
Existing waveguide structures experience increased signal loss at frequencies over 8 GHz, particularly in microstrip antennas and transmission paths, which limits their effectiveness in high-frequency applications.
Innovation Solution
A transmission path structure with a nickel-phosphorus layer having a phosphorus content concentration of 6 to 8 mass% is used, formed by depositing a copper layer, a nickel-phosphorus layer, and a gold layer in a stacked configuration, which reduces transmission loss and improves eye-opening height at frequencies above 8 GHz.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a nickel-phosphorus layer with 8 to 15% phosphorus concentration is used to cause non-magnetization, then transmission characteristics and gain are improved at lower frequencies, but signal loss increases significantly when frequency exceeds 8 GHz
Solution Approach 1:
The invention changes the phosphorus concentration parameter from the conventional 8-15% range to a specific 6-8% range. This parameter optimization resolves the contradiction by finding the sweet spot where non-magnetization is achieved while minimizing AC resistance and signal loss at high frequencies above 8 GHz
Solution Approach 2:
The invention uses a composite layered structure consisting of copper, nickel-phosphorus, and gold layers. Each layer serves a specific function: copper provides conductivity, nickel-phosphorus (at 6-8% P concentration) provides non-magnetic properties with optimized AC resistance, and gold provides corrosion resistance. This composite structure resolves the contradiction by combining materials with complementary properties
2Device complexity
If conventional waveguide structures are used, then structural simplicity is maintained, but transmission loss increases at frequencies over 20 GHz
Solution Approach 1:
The invention optimizes the phosphorus concentration parameter to 6-8% and controls layer thicknesses (copper: 5-20 μm, nickel-phosphorus: 0.1-5 μm, gold: 0.1-5 μm) to achieve low-loss transmission at frequencies over 20 GHz while maintaining the simple planar microstrip structure
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 significantly reduces transmission loss and enhances eye-opening height, thereby minimizing transmission errors and improving antenna gain even at frequencies up to 40 GHz, making it suitable for high-frequency applications.
Implementation Method 1
setting a concentration of phosphorus of the nickel-phosphorus layer to 8 to 15% to cause non-magnetization of nickel
Implementation Method 2
a high-frequency transmission line having low alternate current (AC) resistance
Data Source
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AI summary
To provide a transmission path with little loss even when a signal at a frequency of over 8 GHz is transmitted. In a transmission path 12 transmitting high-frequency signals each containing a frequency component of over 8 GHz, the transmission path 12 includes a nickel-phosphorus layer 122 containing nickel and phosphorus, and a phosphorus concentration of the nickel-phosphorus layer 122 is over 0 mass% and less than 8 mass%. Such a structure enables to provide a transmission path with little loss even when a signal at a frequency of over 8 GHz is transmitted.