Self-Powered RF Splitter Switch for Zero-Standby Bypass
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Solution Overview
Problem
Conventional RF splitter modules require external power for the switch, leading to increased power consumption during standby mode, which is undesirable.
Innovation Solution
An RF switch utilizing a native transistor with zero or near-zero threshold voltage, powered by an RF-to-DC converter without an external power supply, and clamping means to maintain the switching state, allowing for zero DC power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an external power supply is used to power the RF switch, then the switching function is reliable, but power consumption increases during standby mode
Solution Approach 1:
The RF switch is designed to be self-powered by harvesting energy from the RF signal it switches. The switching element (e.g., MOSFET) extracts power directly from the RF input signal, eliminating the need for an external DC power supply while maintaining reliable switching operation during both active and standby modes.
Solution Approach 2:
The invention changes the power supply parameter from external DC voltage to harvested RF energy. By using an RF-to-DC converter circuit integrated with the switching element, the system transforms the RF signal parameters into usable DC power for the switch, enabling zero standby power consumption while maintaining switching reliability.
2Use of energy by moving object
If a native transistor with zero threshold voltage is used, then power consumption is reduced to zero, but the switching element requires special design
Solution Approach 1:
The invention merges the RF switch, RF-to-DC converter, and clamping circuit into a single integrated device. The switching element combines native transistor characteristics with integrated power harvesting and control functions, reducing overall device complexity while achieving zero power consumption through the unified design.
3Area of stationary object
If the RF switch is integrated with the amplifier, then space and cost are reduced, but the amplifier design becomes more complex
Solution Approach 1:
The RF switch is integrated directly into the amplifier circuitry, merging two previously separate functions into a single device. The amplifier design incorporates the switching element and RF-to-DC converter, reducing board space and component count while the added complexity is managed through unified circuit design.
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 an RF switch that consumes no power in standby mode while maintaining the bypass function, providing a cost-effective and space-efficient solution by integrating the RF switch with the amplifier.
Implementation Method 1
the RF switch further comprises an RF-to-DC-converter electrically connected to the input and being capable of supplying a bias Voltage to the switching element which is greater than the threshold voltage
Implementation Method 2
a switching element characterised by a threshold voltage therebetween, wherein the switching element comprises a native transistor
Implementation Method 3
the RF switch further comprises clamping means for maintaining the switching element in an open state in the presence of external power
Data Source
Figure 1~2
Figure 3~4
AI summary
An RF switch for an RF splitter is disclosed, in which the bias voltage for the RF switching elements can be supplied,by means of an RF to DC translator, from the RF signal on the input side to the switch. By means of a native NMOS switch, routing of the RF signal is thus enabled without the necessity for an external power supply.