RF Front-End for Multirange Radar Systems
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Solution Overview
Problem
Current radar systems require separate devices for short and long-range distance measurements due to technological restrictions in III/V semiconductor technologies, leading to inefficiencies from multiple components causing signal losses and reflections.
Innovation Solution
A radio frequency sender/receiver front-end with a terminal for receiving an oscillator signal, distribution units, mixer arrangements, and amplifiers that can be enabled/disabled by control signals, allowing for flexible operation in both receive and send-receive modes with a single antenna, reducing component count and losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate radar devices are used for short-range and long-range measurements, then measurement coverage is improved, but device complexity and component quantity increase
Solution Approach 1:
The patent combines short-range and long-range radar measurement functions into a single radar device. The antenna system integrates both short-range antennas and long-range antennas in one structure, and the control unit coordinates both transmit/receive circuits to perform both measurement types sequentially, eliminating the need for separate radar devices while maintaining full measurement coverage
Solution Approach 2:
The single radar device is designed with multi-functionality to perform both short-range and long-range measurements. The antenna system can operate in different modes (short-range mode with first antenna, long-range mode with second antenna), and the control unit manages the switching between functions, making one device universal for multiple measurement ranges
2Adaptability or versatility
If multiple components are used to construct the radar system, then functional requirements are met, but signal losses and reflections increase
Solution Approach 1:
The radar device is segmented into distinct functional modules: transmit circuit, receive circuit, antenna system with first and second antennas, and control unit. Each module has a specific function, and the control unit manages switching between them. This segmentation allows the system to use only the necessary components for each measurement type, reducing signal path complexity and minimizing losses compared to having all components active simultaneously
3Ease of manufacture
If III/V semiconductor technology is used for RF components, then integration capability is improved, but integration level is limited compared to silicon
Solution Approach 1:
The system employs dynamic switching between different antenna configurations and circuit modes based on measurement requirements. The control unit dynamically activates either the first antenna for short-range measurements or the second antenna for long-range measurements, and similarly switches between transmit and receive circuits. This dynamic operation allows the system to achieve high functional integration within the constraints of III/V semiconductor technology by not requiring all components to be simultaneously active at full capacity
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 enables a single multirange radar system with high integration and efficiency, capable of performing both short and long-range measurements using a single RF front-end, minimizing signal reflections and losses, and allowing for flexible antenna configurations.
Implementation Method 1
a directional coupler which is connected with the oscillator-terminal and the RF terminal for coupling the oscillator signal to the antenna and for coupling a signal received from the antenna to the second input of the mixer
Implementation Method 2
an amplifier for amplifying the oscillator signal and generating the transmit-signal
Implementation Method 3
a mixer having a first input which is connected to the oscillator terminal, a second input, and an output which is connected with the base-band terminal
Data Source
AI summary
An RF sender/receiver front-end is disclosed comprising a terminal for receiving an oscillator signal, at least one distribution unit for distributing the oscillator signal into different signal paths, two or more mixer-arrangements for sending a transmit-signal or for receiving an receive-signal, where each mixer-arrangement comprises a mixer and an amplifier for amplifying the oscillator signal and generating the transmit-signal.