Frequency Up-Conversion Device Using Digital Channel Stacking
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Solution Overview
Problem
Current frequency up-conversion devices and signal transmission systems are costly due to the use of multiple mixers, which also lead to signal interference, especially in wired communication where high-frequency bands require expensive cables for transmission.
Innovation Solution
A frequency up-conversion device utilizing a digital channel stacking circuit and a single mixer to transform signals from different frequency bands into a predetermined frequency interval, reducing circuit design costs and cable expenses by converting high-frequency signals into lower-frequency bands for transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple mixers are used for frequency up-conversion of different frequency bands, then frequency conversion capability is improved, but device cost and complexity increase
Solution Approach 1:
The patent combines multiple frequency conversion functions into a single mixer by using a diplexer to separate input signals into different frequency bands, process them through one mixer with a single local oscillator, and then recombine the outputs. This merging approach eliminates the need for multiple separate mixers while maintaining the ability to handle multiple frequency bands simultaneously.
Solution Approach 2:
The single mixer is designed to perform multiple frequency conversion functions by receiving different input frequency bands through the diplexer and converting them to different output frequency bands. The mixer acts as a universal component that can handle various frequency conversion tasks that would traditionally require separate dedicated mixers for each frequency band.
2Adaptability or versatility
If multiple mixers are used for frequency up-conversion, then frequency conversion capability is improved, but signal interference increases
Solution Approach 1:
The diplexer segments the input signal into different frequency bands before they enter the mixer, ensuring that signals from different frequency bands are processed separately in the frequency domain. This segmentation prevents interference between different frequency signals during the mixing process, as each signal path is clearly defined and isolated until recombination at the output.
Solution Approach 2:
The diplexer acts as an intermediary component that separates and directs different frequency bands to appropriate processing paths within the single mixer. By introducing this intermediary element, the system maintains clear signal paths and prevents direct interference between different frequency signals, while still achieving multi-band frequency conversion through the unified mixer architecture.
3Productivity
If high-frequency bands are used for data transmission, then transmission capacity is improved, but cable cost increases
Solution Approach 1:
The system dynamically changes the frequency parameter of transmitted signals by converting high-frequency data signals to lower frequency bands using the frequency up-conversion device. This parameter change allows the same data transmission capacity to be achieved at lower frequencies, where standard, lower-cost cables can be used instead of expensive high-frequency specialized cables.
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
The solution effectively reduces the cost of the circuit design and cable costs by efficiently transforming signals into predetermined frequency intervals, minimizing interference and optimizing transmission characteristics.
Implementation Method 1
The input terminal of the first diplexer receives the first signal, and divides the first signal into a second signal and a third signal. The second signal and the third signal are respectively transmitted through the first output terminal and the second output terminal. The second signal and the third signal are respectively transmitted through the second frequency band and the third frequency band.
Implementation Method 2
The up-conversion mixer is electrically connected to the digital channel stacking circuit for mixing the fourth signal and an up-conversion oscillating signal to generate a fifth signal.
Data Source
AI summary
A frequency up-conversion device and a signal transmission system are provided. A frequency up-conversion device includes a first diplexer, a divider, a digital channel stacking circuit, an up-conversion mixer, and a second diplexer. The first diplexer divides a first signal into a second signal and a third signal. The digital channel stacking circuit transforms the second signal to a fourth signal. The up-conversion mixer mixes the fourth signal and an up-conversion oscillating signal to generate a fifth signal. The second diplexer receives the fifth signal and the third signal to generate a sixth signal for output.