Multi-port Distributed Antenna With Selective LNA Control
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Solution Overview
Problem
Conventional mobile wireless communication devices face power inefficiencies in their transmitters and receivers, which significantly impact battery life due to high power consumption, especially in systems where these components are not optimized for power efficiency.
Innovation Solution
A system and method utilizing a multi-port distributed antenna with selectively enabled low noise amplifiers, integrated on a chip or external, to optimize gain levels based on input impedance and characteristic impedance of the antenna ports, enabling variable gain control and linearity on demand for efficient RF signal reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional transmitters and receivers are used in mobile wireless devices, then basic communication functionality is achieved, but power consumption is high which significantly impacts battery life
Solution Approach 1:
The antenna system is divided into multiple ports with multiple low noise amplifiers (LNAs) that can be independently controlled. Each LNA is coupled to a specific port and can be selectively enabled or disabled based on operating conditions, allowing the system to segment power consumption across multiple components rather than operating a single LNA at full capacity continuously.
Solution Approach 2:
The system dynamically adjusts gain levels and selects which LNAs to enable based on real-time operating conditions such as signal strength and impedance requirements. This dynamic adaptation allows the receiver to optimize power consumption by enabling only the necessary LNAs at appropriate gain levels rather than maintaining fixed high-power operation.
2Device complexity
If fixed gain amplifiers are used in the receiver, then circuit simplicity is maintained, but power efficiency is reduced due to inability to optimize gain levels for different operating conditions
Solution Approach 1:
Multiple LNAs with different input impedances are integrated into the system, each capable of operating at its optimal gain level. The system universally supports multiple operating modes by selecting appropriate LNA combinations based on impedance matching requirements and signal conditions, allowing a single receiver circuit to handle diverse operating scenarios efficiently.
Solution Approach 2:
The system changes operating parameters such as gain level and impedance matching by selectively enabling different LNAs based on operating conditions. Each LNA is configured with specific input impedance characteristics, and the system adjusts which LNAs are active to match the antenna port impedance, thereby optimizing both power efficiency and signal reception across varying conditions.
3Use of energy by moving object
If multiple low noise amplifiers are integrated with different input impedances, then power efficiency and gain optimization are improved, but device complexity increases
Solution Approach 1:
Multiple LNAs with different input impedances are integrated into a single receiver unit with a unified control mechanism. The control logic merges the operation of multiple amplifiers into a coordinated system that selects and combines LNA outputs based on impedance matching requirements, thereby managing device complexity through integration rather than separate independent circuits.
Solution Approach 2:
The system incorporates automatic impedance matching and LNA selection functionality that operates autonomously based on detected operating conditions. The receiver self-adjusts which LNAs to enable and at what gain levels by monitoring impedance characteristics and signal conditions, reducing the need for complex external control circuitry and manual configuration.
Data Source
AI summary
Methods and systems for receiving signals via a multi-port distributed antenna are disclosed and may include selectively enabling one or more low noise amplifiers (LNAs) coupled to the antenna. The selective enabling may be based on a desired gain level applied to a signal received from the antenna. The LNAs may be coupled to ports on the antenna based on an input impedance of the LNAs and an impedance of the ports. Each of the LNAs may be configured for optimum linearity in different gain ranges, which may be proportional to the input impedance of the LNAs. The antenna may be integrated on a chip with the LNAs, or may be located external to the chip. The antenna may include a microstrip antenna. The LNAs may include variable gain and may be enabled utilizing a processor. Linearity on demand may be enabled via the selective enabling of the LNAs.