Orthogonal Signal Generator With Frequency-Tuned Phase Shifting
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Solution Overview
Problem
The bandwidth of the orthogonal signal generator in the phase shifter is not wide enough to generate orthogonal signals under a wide bandwidth, limiting the overall bandwidth of the phase shifter.
Innovation Solution
An orthogonal signal generator with a first and second stage phase shifting circuit, where the impedance of each stage is adjustable based on the frequency of the input signal, allowing the phase shifter to have different impedances for signals with varying frequencies, thereby increasing its bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the orthogonal signal generator uses a fixed impedance design, then the circuit structure is simple, but the bandwidth is limited and cannot generate orthogonal signals under wide bandwidth
Solution Approach 1:
The patent applies the dynamics principle by making the impedance of phase shifting circuits adjustable based on signal frequency. The first and second phase shifting circuits have impedances that can be dynamically changed according to the frequency of input signals, allowing the orthogonal signal generator to adapt to a wide bandwidth range while maintaining proper signal processing across different frequencies.
Solution Approach 2:
The patent implements parameter changes by varying the impedance parameters of the phase shifting circuits based on input signal frequency. The controller adjusts the impedance of the first and second phase shifting circuits according to the frequency characteristics of the input signal, enabling the system to maintain optimal performance across a wide bandwidth without requiring a completely complex redesign.
2Adaptability or versatility
If the orthogonal signal generator uses a wide bandwidth design, then the bandwidth is sufficient, but the phase shifting precision may be compromised
Solution Approach 1:
The patent maintains phase shifting precision across wide bandwidth by dynamically adjusting the impedance of each phase shifting circuit based on the frequency of the input signal. This dynamic adaptation ensures that the phase shifting accuracy is preserved at different frequency points within the wide bandwidth range, preventing precision degradation that would normally occur when expanding bandwidth.
Solution Approach 2:
The patent employs feedback mechanisms where the controller monitors the frequency of the input signal and adjusts the impedance of the phase shifting circuits accordingly. This feedback loop ensures that the phase shifting precision is maintained across the wide bandwidth by continuously optimizing the circuit parameters based on the actual operating conditions.
Data Source
AI summary
An orthogonal signal generator includes a first stage phase shifting circuit and a second stage phase shifting circuit. The output end of the first stage phase shifting circuit is connected with the input end of the second stage phase shifting circuit, an impedance of the first stage phase shifting circuit is adjustable based on the frequency of a first input signal. The first stage phase shifting circuit is configured to phase-shift the first input signal by a first phase shifting angle to generate a first phase shifting angle signal. An impedance of the second stage phase shifting circuit is adjustable based on a frequency of a second input signal. The second stage phase shifting circuit is configured to phase-shift the phase-shifted second input signal by a second phase shifting angle to output an orthogonal signal with the corresponding frequency.