Shared UWB Circuit for Interference-Resistant Radar and Ranging
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Solution Overview
Problem
Conventional UWB circuits require two separate circuits for signal transmission and reception, leading to increased cost and susceptibility to interference due to the use of omnidirectional antennas.
Innovation Solution
A single UWB circuit with a switch, transmission and receiving circuits, low noise amplifiers, and a control register that allows simultaneous operation in radar detection and ranging modes, using directional and omnidirectional antennas respectively, reducing circuit area and improving performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two separate UWB circuits are used for transmission and reception, then signal transmission and reception can be performed, but the cost increases and circuit area increases
Solution Approach 1:
The patent merges the transmission circuit and receiving circuit into a single integrated UWB circuit. The transmitting circuit includes a transmitting buffer, modulator, and power amplifier, while the receiving circuit includes a low-noise amplifier and demodulator, all integrated within one UWB circuit structure. This consolidation reduces the number of separate circuits from two to one, thereby reducing cost and circuit area while maintaining both transmission and reception capabilities.
Solution Approach 2:
The single UWB circuit is designed to perform multiple functions - both signal transmission and signal reception - within the same circuit architecture. The circuit can switch between transmitting mode and receiving mode, making it a universal circuit that eliminates the need for separate dedicated transmission and reception circuits, thus reducing overall system complexity and cost.
2Device complexity
If omnidirectional antennas are used for sharing UWB circuit, then cost is reduced, but interference resistance decreases and accuracy decreases
Solution Approach 1:
The patent employs different antenna types for different functional requirements within the same system. Specifically, it uses a first omnidirectional antenna for ranging operations where 360-degree coverage is needed, and a second directional antenna for radar detection where focused beam coverage and interference rejection are prioritized. This local quality differentiation allows each antenna to be optimized for its specific function, achieving both cost efficiency and performance.
Solution Approach 2:
The system dynamically switches between different antenna configurations based on the operational mode. The controller selects which antenna to use depending on whether the system is performing ranging or radar detection functions. This dynamic adaptation allows the system to optimize performance for each specific task while maintaining a relatively simple overall antenna structure.
Data Source
AI summary
An ultra-wideband (UWB) circuit includes a first pin, a second pin, a control register, a baseband circuit, a switch, a transmission circuit, a receiving circuit, a first low noise amplifier (LNA), and a second LNA. The control register stores a plurality of control values. The baseband circuit is coupled to the control register and configured to set the control values. The switch is coupled to the first pin. The transmission circuit is coupled to the control register and the switch and operates according to one of the control values. The receiving circuit is coupled to the control register and operates according to one of the control values. The first LNA is coupled to the switch and the receiving circuit. The second LNA is coupled to the second pin and the receiving circuit.