Radar Antenna Return Loss Compensation
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Solution Overview
Problem
Radar apparatuses for vehicle control face signal loss due to antenna return loss, which varies by frequency, affecting signal magnitude and performance, especially when using wide frequency bands for mid/long range and short range detection.
Innovation Solution
A method and apparatus for calculating and applying return loss compensation information to reception signals, using techniques such as envelope information extraction and Fast Fourier Transform (FFT) to adjust signal magnitude across frequencies, thereby compensating for frequency-band based antenna return loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a wide frequency band is used for mid/long range and short range detection, then detection range and versatility are improved, but signal loss due to antenna return loss variation increases
Solution Approach 1:
The patent applies parameter changes by measuring and compensating for antenna return loss across different frequency bands. The system measures the actual return loss characteristics of the antenna at various frequencies and uses this information to adjust compensation parameters, thereby optimizing signal reception across the wide frequency band while minimizing energy loss.
Solution Approach 2:
The patent implements feedback by measuring the actual antenna return loss and using this measurement to generate compensation information. The system continuously monitors the return loss characteristics and adjusts the compensation applied to received signals based on these measurements, creating a closed-loop system that optimizes performance across the frequency band.
2Stability of the object's composition
If frequency-band based compensation is applied to reception signals, then signal magnitude stability is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by measuring and storing antenna return loss characteristics before actual detection operations. The system performs compensation information generation in advance based on measured return loss data, and this pre-computed compensation information is then applied during signal reception, reducing real-time processing complexity while maintaining signal stability.
3Measurement precision
If return loss compensation information is calculated and applied, then detection accuracy (SNR, distance, speed) is improved, but processing time and computational load increase
Solution Approach 1:
The patent performs compensation information calculation in advance based on measured return loss characteristics. By pre-computing the compensation data and storing it for later use, the system reduces the computational burden and processing time required during actual detection operations, while still achieving improved detection accuracy through the applied compensation.
Data Source
AI summary
The present disclosure relates to an antenna return loss compensation apparatus and method of a radar and a radar apparatus using the same. The antenna return loss compensation apparatus may include a compensation information calculator configured to calculate return loss compensation information for compensating for a frequency-band based antenna return loss, and a return loss compensator configured to apply return loss compensation information to a reception signal that is reflected from an object and is received, so as to generate a final reception signal, may calculate and store, in advance, compensation information for a return loss occurring in the antenna, may perform compensation associated with the magnitude of a reception signal when measurement is performed using the radar, so that the reception signal has the same magnitude, whereby a radar's performance deterioration attributable to the return loss of the antenna may be minimized.