Camera Antenna Layout for Transceiver Coexistence
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Solution Overview
Problem
In smart home environments, multiple transceiver devices experience poor isolation due to close physical spacing and shared frequency bands, leading to communication interference and potential damage from excessive input power.
Innovation Solution
Implementing a camera assembly with strategically positioned antennas and bypass circuitry, along with a front-end module that dynamically couples antennas to transceivers based on transmission activity, to manage coexistence and prevent interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple transceivers are placed in close physical spacing within a compact device, then device integration and communication capability are improved, but isolation between transceivers deteriorates leading to interference and potential damage
Solution Approach 1:
The device divides the compact housing into distinct spatial zones, positioning each transceiver and its associated antenna in separate locations to minimize electromagnetic interference while maintaining overall device integration
Solution Approach 2:
The front end module implements dynamic, transceiver-specific coupling configurations where each transceiver can be independently connected to its designated antenna through bypass circuitry, allowing localized optimization of signal paths based on transmission state
2Productivity
If transceivers share the same or close frequency bands to improve spectrum utilization, then communication efficiency is improved, but harmful interference between transceivers increases
Solution Approach 1:
The system employs time-division multiplexing where transceivers operating in the same frequency band are activated in alternating time slots, with each transceiver transmitting during its designated period and remaining inactive during others, thereby eliminating simultaneous interference while maintaining efficient spectrum use
Solution Approach 2:
The control module continuously monitors the transmission state of each transceiver and dynamically adjusts coupling configurations through bypass circuitry, enabling real-time coordination that prevents interference when multiple transceivers share frequency bands
3Measurement precision
If amplifiers are always active to improve signal reception sensitivity, then communication sensitivity is improved, but risk of damage from excessive input power increases
Solution Approach 1:
The front end module implements dynamic coupling where amplifiers are selectively engaged or disengaged based on real-time transmission state detection, allowing the system to optimize between sensitivity and protection by adjusting amplifier coupling in response to changing conditions
Solution Approach 2:
Bypass circuitry acts as an intermediary between transceivers and amplifiers, providing alternative signal paths that can route signals directly to transceivers when amplifiers are disengaged, thereby protecting amplifiers from excessive power while maintaining communication functionality
Data Source
AI summary
A camera assembly includes an enclosed housing having a rear surface, a front surface, and a periphery. The camera assembly also includes a lens module located within the housing and configured to receive light via the front surface, and communication circuitry located within the housing and configured to wireless communicate over a plurality of different communication protocols. The camera assembly further includes a first antenna arranged at a first location on an inner surface of the periphery, the first antenna configured for communication over a first one of the communication protocols, and a second antenna arranged at a second location on the inner surface of the periphery, the second location being different than the first location, the second antenna configured for communication over a second one of the communication protocols.