Wireless Device Antenna Switching Circuit
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Solution Overview
Problem
The complex wiring architecture in conventional wireless communication devices leads to noise and reduced efficiency in GPS signal transmission, increased circuit board surface area, technical difficulty, and higher costs, along with unnecessary power consumption when using an external antenna module.
Innovation Solution
A wireless communication device design that includes a housing, internal and external antenna modules, a direct current power source, signal processing module, low noise amplifiers, and a switch with equivalent inductances and capacitances to selectively route signals and power, allowing switching between internal and external antenna modules while minimizing noise and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an external antenna module is connected to replace the internal antenna module, then signal reception capability is improved, but the wiring architecture becomes more complex and power consumption increases
Solution Approach 1:
The patent extracts the antenna module from the GPS SiP chip, separating the antenna function from the signal processing function. This allows the antenna to be placed externally while maintaining clean wiring architecture, as the antenna connections are isolated from the complex internal circuitry of the GPS SiP chip.
Solution Approach 2:
The patent segments the wireless communication device into distinct functional modules: an internal antenna module, an external antenna module, and a GPS SiP chip. This segmentation enables independent optimization of each module and simplifies the overall system architecture by allowing selective connection of antenna modules without affecting the integrated circuit.
2Reliability
If an external antenna module is connected, then signal reception capability is improved, but power consumption increases due to continuous operation of the first low noise amplifier
Solution Approach 1:
The patent implements dynamic power control by making the power supply to the first low noise amplifier conditional on the antenna module connection state. When the external antenna module is connected, the switch opens to disconnect power from the first LNA, preventing unnecessary power consumption. When the internal antenna module is used, the switch closes to enable power supply.
Solution Approach 2:
The patent uses a feedback mechanism where the switch state is controlled based on the connection status of the antenna module. The switch receives control signals that indicate whether the external or internal antenna module is connected, and accordingly adjusts the power supply state of the first low noise amplifier to match the active antenna configuration.
3Adaptability or versatility
If complex wiring architecture is used to support external antenna module, then switching capability is improved, but circuit board surface area increases and manufacturing difficulty increases
Solution Approach 1:
The patent designs the switch and wiring architecture to serve multiple functions: the switch not only controls signal routing between antenna modules but also controls power supply to the first low noise amplifier. This multi-functionality reduces the number of separate components and wiring paths needed, simplifying the overall circuit board design.
Solution Approach 2:
The patent merges the signal routing function and power control function into a single switch component. By combining these functions, the patent reduces the number of separate control circuits and wiring paths required, thereby reducing the circuit board surface area and simplifying manufacturing.
Data Source
AI summary
A wireless communication device includes an internal antenna module, a DC power source, a signal processing module, a first low noise amplifier coupled to the internal antenna module including a signal input end, a power input end, and a signal output end. The wireless communication device further includes a switch including a first terminal for coupling to an external antenna module, a second terminal, and a third terminal. The wireless communication device further includes a first equivalent inductor coupled to the DC power source and the second terminal, a second equivalent inductor coupled to the input end of the first low noise amplifier and the third terminal, a first capacitor coupled to the signal output end of the first low noise amplifier and the third terminal, and a second capacitor coupled to the signal processing module and the second terminal.