Common-Path Bi-Directional Amplifier for Signal Isolation
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Solution Overview
Problem
Traditional bi-directional amplifiers often require separate amplification paths for uplink and downlink signals, increasing component count and complexity, whereas a common amplification path for both signals can reduce these aspects.
Innovation Solution
A bi-directional amplifier with a common amplification path that uses the same amplifiers for both uplink and downlink signals, reducing the number of components and PCB size, and includes a common signal detector to manage signal power levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate amplification paths are used for uplink and downlink signals, then signal amplification reliability is improved, but device complexity and component count increase
Solution Approach 1:
The patent combines separate uplink and downlink amplification paths into a single common amplification path. The amplifier circuit receives both uplink signals from the wireless device and downlink signals from the access point through a coupler, and amplifies both signals simultaneously using the same amplifier components. This merging approach reduces the number of amplifiers and associated components while maintaining the ability to amplify both signal directions effectively.
Solution Approach 2:
The amplifier in the patent serves multiple functions by amplifying both uplink and downlink signals through a single common path. The same amplifier circuitry that would traditionally be dedicated to one direction is now universally applied to both directions, making the amplification system more versatile and reducing overall system complexity.
2Adaptability or versatility
If separate amplification paths are used for uplink and downlink signals, then signal processing capability is improved, but PCB area and device size increase
Solution Approach 1:
The patent merges separate amplification paths into a common path, significantly reducing the PCB area required. By eliminating duplicate amplifier circuits and their associated components for uplink and downlink, the physical footprint on the PCB is reduced while the signal processing capability is maintained through intelligent signal routing and a single shared amplification stage.
3Device complexity
If a common amplification path is used for both uplink and downlink signals, then device complexity is reduced, but signal isolation and interference management become more difficult
Solution Approach 1:
The patent introduces a coupler as an intermediary device that separates the uplink and downlink signal paths before they enter the common amplification path. The coupler effectively isolates the two signal directions, preventing interference while allowing both signals to share the same amplifier. This intermediary component manages the potential harmful interactions between uplink and downlink signals in the common path.
Solution Approach 2:
The patent applies local quality by providing signal isolation specifically at the coupling point where uplink and downlink signals meet, while maintaining a common amplification path elsewhere. The coupler provides localized separation functionality exactly where needed, allowing the rest of the system to benefit from the simplified common path architecture.
Data Source
AI summary
According to some embodiments described herein, a bi-directional amplifier may include a first interface port configured to receive a first signal. The bi-directional amplifier may also include a second interface port. The second interface port may be communicatively coupled to the first interface port and may be configured to receive a second signal. The second interface port may be communicatively coupled to the first interface port such that the first signal propagates from the first interface port to the second interface port and such that the second signal propagates from the second interface port to the first interface port. The bi-directional amplifier may also include a common amplifier communicatively coupled between the first interface port and the second interface port such that the common amplifier is configured to receive and amplify both the first signal and the second signal.