AiM Antenna Placement and RF Wake-Up for Thin IoT Devices
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Determining optimal antenna-in-module (AiM) placement in user devices to achieve adequate coverage while maintaining thin and light form factors and minimizing thermal impact, and reducing power consumption in IoT devices by optimizing sleep cycles and using passive circuitry for remote wake-up.
Innovation Solution
Optimizing AiM placement by identifying critical design parameters and reducing the number of AiMs, using passive circuitry to wake devices only when needed, and implementing RF signal-based power management to keep devices in a powered-down state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple antennas are placed in user device to improve coverage, then antenna gain and coverage are improved, but device weight and thermal profile are adversely affected
Solution Approach 1:
The patent combines multiple antenna functions into a single antenna-in-module (AiM) component that can be placed remotely from the main device chassis. This merging approach provides multi-directional coverage equivalent to multiple separate antennas while reducing the overall weight and thermal impact on the device.
Solution Approach 2:
The patent transitions from planar antenna placement within the device chassis to three-dimensional remote placement of the AiM component. By positioning the AiM in an extended dimension away from the main device body, the system achieves improved coverage without adding weight to the primary device structure.
2Reliability
If multiple antennas are placed in user device to improve coverage, then antenna gain and coverage are improved, but thermal management is adversely affected
Solution Approach 1:
The patent extracts the antenna function from the main device chassis and places it in a separate AiM component. This extraction removes the thermal burden of multiple antennas from the device body, allowing improved coverage without adversely affecting the thermal profile of the main device structure.
Solution Approach 2:
By moving antennas to a remote three-dimensional position away from the device chassis, the patent separates the thermal management concerns of the antenna system from the main device body, enabling improved coverage while maintaining acceptable thermal profiles in the primary device structure.
3Reliability
If IoT devices remain powered on to maintain connectivity, then communication availability is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic wake-up cycles where the IoT device transitions between sleep and active states. The device wakes at predetermined intervals to check for messages and then returns to sleep mode, providing periodic communication availability while significantly reducing average power consumption compared to continuous operation.
Solution Approach 2:
The patent employs passive circuitry that can autonomously detect wake-up triggers (such as RF signals or button presses) without requiring the main device processor to remain active. This self-service capability allows the device to maintain extremely low power consumption while still responding to external events that require communication.
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
Achieves efficient antenna coverage and thermal management in thin and light devices while significantly reducing power consumption, particularly in IoT devices.
Implementation Method 1
The passive circuitry is configured to: store electrical charge upon reception of a signal at a center frequency for the apparatus, and provide power to wake active circuitry upon stored charge reaching or exceeding a threshold charge
Data Source
AI summary
A method for defining antenna in module (AiM) placement within a user device can include configuring a simulation of antenna gain of antenna in module (AiM) components. The simulation can include as an output a cumulative distribution function (CDF) representing AiM coverage. The method can include identifying a first parameter of a set of antenna in module (AiM) placement parameters that has a largest effect on an antenna performance criterion observed in the simulation. The method can include adjusting other parameters based on the first parameter and specifying final placement of the AiM. An apparatus can include antennas and a radio front end including active circuitry and passive circuitry. The passive circuitry can be energized by a signal at a center frequency for the apparatus. The passive circuitry can store electrical charge and power on the active circuitry when charge reaches a threshold.