Switchable Radiation Loss Attenuator for Precise RF Test Control
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Solution Overview
Problem
In radio frequency test systems, accurately controlling signal attenuation values is challenging due to deviations in material parameters and processing accuracy, especially in millimeter wave frequency bands, leading to inconsistent and difficult-to-predict attenuation values.
Innovation Solution
An attenuation apparatus with a signal transmission channel and radiation loss structures that can switch between radiation and transmission attenuation modes, allowing adjustable attenuation values through a physical switch mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If fixed insertion loss attenuators are designed using microstrip lines, waveguides, or substrate integrated waveguide transmission lines, then the attenuator structure is simple and manufacturing is easier, but the real attenuation value varies within a range due to material parameter deviations and processing accuracy influences
Solution Approach 1:
The patent introduces a dynamic adjustment mechanism by placing adjustable impedance elements (such as variable capacitors or inductors) within the transmission line structure. This allows the attenuation value to be dynamically tuned after manufacturing, compensating for deviations caused by material and processing variations. The adjustable elements enable real-time calibration to achieve precise attenuation values without redesigning the entire structure.
Solution Approach 2:
The patent employs variable impedance elements that can change their electrical parameters (capacitance or inductance) to adjust the attenuation characteristic. By changing these parameters, the system can compensate for manufacturing tolerances and achieve the desired precise attenuation value. This is implemented through adjustable components that modify the effective impedance of the transmission line.
2Adaptability or versatility
If attenuators with different attenuation values are designed to meet varying test requirements, then the adaptability to different test scenarios is improved, but the device complexity and design costs increase
Solution Approach 1:
The patent designs a universal attenuator structure that can provide multiple attenuation values through a single device. By incorporating adjustable impedance elements, one attenuator design can serve multiple test scenarios with different attenuation requirements. This eliminates the need for multiple dedicated attenuators for different test cases, reducing overall system complexity and design costs while maintaining high adaptability.
Solution Approach 2:
The adjustable nature of the attenuator allows it to dynamically adapt to different test requirements. A single physical device can be reconfigured to provide different attenuation values by adjusting the impedance elements, replacing the need for multiple fixed attenuators. This dynamic capability provides versatility without increasing device complexity.
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
Enables precise control of attenuation values, simplifies design processes, reduces costs, and enhances compatibility with varying test requirements by allowing adjustable attenuation without needing new attenuator designs.
Implementation Method 1
the radiation loss structure is configured to perform radiation attenuation on energy of a signal transmitted by the signal transmission channel
Implementation Method 2
when the physical switch is in a closed state, a radiation transmission path of a corresponding radiation loss unit is blocked
Data Source
AI summary
An attenuation apparatus and a test system. The attenuation apparatus includes a signal transmission channel and at least one radiation loss structure, wherein the signal transmission channel is configured to perform transmission attenuation on the energy of a transmitted signal; the radiation loss structure is arranged in the signal transmission channel; the radiation loss structure has a first operating state and a second operating state; when the radiation loss structure is in the first operating state, the radiation loss structure is configured to perform radiation attenuation on the energy of a signal transmitted by the signal transmission channel; and when the radiation loss structure is in the second operating state, the radiation loss structure is configured to perform transmission attenuation on the energy of the signal transmitted by the signal transmission channel.