Transmitter Digital Delay Circuit Beam Directivity Control
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Solution Overview
Problem
Densely mounted transmission blocks in wireless communication devices face challenges in consistent wiring lengths, leading to synchronization deviations and deterioration in signal quality due to variations in wiring lengths, affecting beam directivity control.
Innovation Solution
Incorporating digital delay circuits, amplification devices, and bandpass filters corresponding to each antenna element, which delay and amplify one-bit digital RF signals to synchronize output signals and control beam directivity by passing signals of a predetermined frequency band to the antenna elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If transmission blocks are mounted densely to improve integration, then device complexity is reduced, but wiring length variations increase causing synchronization deviation
Solution Approach 1:
The patent applies preliminary action by introducing delay circuits before the power amplifiers to pre-compensate for wiring length differences. The delay amount is determined in advance based on the wiring length of each transmission block, allowing synchronization correction before signal amplification and transmission.
Solution Approach 2:
The patent changes the timing parameter of signals by adjusting delay amounts for different transmission blocks. By varying the delay parameter according to each block's wiring length, the patent compensates for path differences and achieves synchronization across all antenna elements.
2Reliability
If wiring length variations are reduced to improve signal quality, then synchronization accuracy improves, but device complexity increases
Solution Approach 1:
The patent applies local quality by providing individual delay circuits for each transmission block rather than a uniform solution. Each delay circuit is configured with a specific delay amount matched to its corresponding transmission block's wiring characteristics, enabling localized compensation without increasing overall system complexity.
3Reliability
If delay circuits are added to each transmission block to correct synchronization, then signal quality improves, but device complexity increases
Solution Approach 1:
The patent applies universality by using delay circuits that can be configured with different delay amounts to serve multiple transmission blocks with varying wiring lengths. The delay circuits perform both synchronization correction and timing adjustment functions, reducing the need for separate correction mechanisms.
Data Source
AI summary
This transmitter is provided with: a digital delay circuit which delays a 1-bit digital RF signal on the basis of another 1-bit digital RF signal; an amplifier which amplifies a signal output by the digital delay circuit; and a band-pass filter which allows signals in a prescribed frequency band, from among signals output by the amplifier, to pass. A signal output by the band-pass filter is input into a corresponding one antenna element from among a plurality of antenna elements, and controls the directionality of a beam formed by the plurality of antenna elements.