Radiation Type Oscillator Pulse Radar Device Integration
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Solution Overview
Problem
Conventional microwave/milliwave band UWB pulse radar devices face challenges such as complex circuit configurations, high costs, high power consumption, and difficulties in achieving compact integration and high performance due to issues like transmission line losses, multiple reflections, and inefficient frequency conversion.
Innovation Solution
A pulse radar device utilizing a radiation type oscillator with a three-electrode high-frequency amplifying device that generates negative resistance in a resonant cavity, sharing an antenna function to radiate high-frequency pulse signals and perform homodyne mixing, eliminating the need for transmission lines and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional transmission line configuration is used to connect pulse signal generator and ultra-wideband antenna, then frequency conversion can be achieved, but transmission line losses increase and device complexity increases
Solution Approach 1:
The patent merges the pulse signal generator and ultra-wideband antenna into a single integrated device. The oscillating circuit generates pulses directly within the resonant cavity structure that also serves as the radiating element, eliminating the need for separate transmission lines and reducing both energy loss and device complexity.
Solution Approach 2:
The resonant cavity structure performs multiple functions simultaneously: it acts as both the oscillating circuit for pulse generation and the radiating element for electromagnetic wave emission. This multi-functionality eliminates the need for separate transmission line components.
2Reliability
If multiple separate circuits (filter, amplifier, RF switch) are used to achieve ultra-wideband characteristics, then frequency selectivity and signal processing are improved, but device complexity and cost increase
Solution Approach 1:
The patent combines filtering, amplification, switching, and radiating functions into a single integrated oscillating circuit within the resonant cavity. The circuit is designed to inherently provide ultra-wideband characteristics without requiring separate filter, amplifier, and RF switch components.
Solution Approach 2:
The integrated oscillating circuit performs multiple functions: pulse generation, frequency selection, signal amplification, and electromagnetic radiation. This universal design achieves ultra-wideband characteristics while reducing the number of discrete components.
3Productivity
If conventional pulse generation methods using ultra-wideband filter circuits or high-speed RF switches are used, then pulse signals can be generated, but power consumption increases and device complexity increases
Solution Approach 1:
The patent combines pulse generation and radiation functions into a single oscillating circuit within the resonant cavity. This eliminates the need for high-speed RF switches and ultra-wideband filter circuits, significantly reducing power consumption while maintaining pulse signal generation capability.
Solution Approach 2:
The oscillating circuit generates pulses autonomously within the resonant cavity without requiring external high-speed switching mechanisms. The circuit self-regulates the pulse generation process, reducing the need for additional power-consuming control components.
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 simplifies the structure, reduces costs, enhances performance, and enables compact integration while minimizing power consumption and heat generation, improving frequency conversion efficiency and sensitivity.
Implementation Method 1
a three-electrode high-frequency amplifying device that generates negative resistance in a resonant cavity
Implementation Method 2
generates negative resistance in a resonant cavity
Implementation Method 3
the radiation type oscillator itself performs homodyne mixing to provide an IF signal
Data Source
AI summary
A radiation type oscillator including a radiation type oscillator substrate including a microwave transistor for generating negative resistance by short-duration operation and a resonant cavity structure; a high-frequency pulse signal of an oscillation frequency/frequency bandwidth determined by negative resistance produced by the short-duration operation of the microwave transistor and the resonant cavity structure is generated as a transmitted RF signal and simultaneously radiated into space. The radiation type oscillator performs oscillating operation when a received RF signal that is a reflected wave of the transmitted RF signal from an object of detection enters the radiation type oscillator, an IF signal is acquired from an IF signal output terminal owing to homodyne mixing by the radiation type oscillator itself, and this is analyzed and processed to detect the object of detection.