Differential Rectifying Antenna Circuit Without Impedance Matching
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Solution Overview
Problem
Traditional rectifying antennas improve sensitivity by using low-noise amplifiers, which are costly, increasing overall costs and requiring impedance matching, limiting their application.
Innovation Solution
An amplifying circuit comprising a first and second rectifying circuit and a differential amplifying circuit that amplifies the difference between opposing direct current signals, eliminating the need for low-noise amplifiers and reducing costs by canceling out low noise components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If low-noise amplifiers are used to improve sensitivity of electromagnetic wave detection, then sensitivity is improved, but cost increases significantly
Solution Approach 1:
The patent divides the amplification function into two separate rectifying circuits that process signals in parallel paths. Each circuit rectifies the input signal independently, and their outputs are combined through a differential amplifier. This segmentation allows the system to achieve low-noise amplification without requiring a single expensive low-noise amplifier component, thereby reducing overall cost while maintaining sensitivity.
Solution Approach 2:
The patent combines the output signals from two separate rectifying circuits through a differential amplifier. By merging these two rectified signals and amplifying their difference, the system achieves enhanced sensitivity comparable to using a low-noise amplifier, but with lower overall cost since it uses standard components in a clever configuration rather than expensive specialized components.
2Measurement precision
If low-noise amplifiers are used to improve sensitivity, then sensitivity is improved, but device complexity increases due to impedance matching requirements
Solution Approach 1:
By segmenting the signal processing into two independent rectifying circuits, the patent eliminates the need for impedance matching that would be required in a traditional single-path amplification system. Each rectifying circuit operates independently with standard components, and the differential amplifier naturally handles the combination without additional impedance matching complexity, thereby reducing device complexity while maintaining sensitivity.
3Device complexity
If traditional rectifying methods are used, then structure is simple, but sensitivity is limited by antenna gains and transmission losses
Solution Approach 1:
The patent merges two rectifying circuits with their outputs fed into a differential amplifier. This combination allows the system to overcome the sensitivity limitations of traditional single-path rectifying methods. The differential amplification of the two rectified signals provides enhanced sensitivity without significantly increasing structural complexity, as it builds upon the simple rectifying circuit concept rather than replacing it entirely.
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
Enhances the sensitivity of electromagnetic wave detection while reducing overall costs and allowing application to different antennas without impedance matching.
Implementation Method 1
a first rectifying circuit, configured to output a first direct current signal according to a first alternating current signal; a second rectifying circuit, configured to output a second direct current signal according to a second alternating current signal
Implementation Method 2
a differential amplifying circuit, configured to receive the first direct current signal and the second direct current signal, amplify a difference between the first direct current signal and the second direct current signal
Implementation Method 3
the first rectifying circuit includes at least one of a first band-pass filter and a first low-pass filter
Data Source
AI summary
An amplifying circuit and a rectifying antenna are provided. The amplifying circuit includes: a first rectifying circuit (20), configured to output a first direct current signal according to an alternating current signal; a second rectifying circuit (30), configured to output a second direct current signal according to the alternating current signal; a differential amplifying circuit (40), configured to receive the first direct current signal and the second direct current signal, amplify a difference between the first direct current signal and the second direct current signal, and output an amplified difference between the first direction current signal and the second direct current, the first direct current signal and the second direct current signal have directions opposite to each other. The amplifying circuit can improve sensitivity of an antenna with relatively low costs.