RF Measurement System Using Virtual Shield Box for 60 GHz Throughput
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Solution Overview
Problem
Current RF characteristic measurement systems for 60 GHz devices are limited in measuring both RF characteristics and throughput, especially in non-signaling mode, and require expensive equipment and physical variations in distance for accurate measurements.
Innovation Solution
A radio frequency (RF) characteristic measurement system that includes a shield box with an access point (AP) antenna and a device under test (DUT), a testing apparatus with an attenuator and an AP board to generate and measure RF signals, and a control device to manage operations, allowing for the measurement of RF characteristics and throughput using a small-scale shield box based on simulation information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a commercial 60 GHz 801.11ay AP is used to measure throughput, then throughput measurement is enabled, but the distance between DUT and AP must be physically varied and measurement must be conducted inside a large shield room
Solution Approach 1:
The patent creates a virtual shield room environment using simulation information to replicate the measurement conditions of a physical shield room. This allows throughput measurement to be performed in a small-scale shield box rather than requiring a large physical shield room, thereby reducing measurement environment complexity while maintaining measurement precision
Solution Approach 2:
The patent uses simulation information to determine equivalent measurement parameters for the small-scale shield box that correspond to the large shield room conditions. By changing the physical parameters of the measurement environment while maintaining the functional equivalence through simulation data, the system achieves accurate throughput measurement without requiring the original large-scale environment
2Measurement precision
If distance between DUT and AP is physically varied to measure sensitivity point, then sensitivity measurement is enabled, but measurement must be conducted inside a large shield room
Solution Approach 1:
The patent uses simulation information to create a virtual model of the shield room environment, allowing sensitivity measurements to be performed in a compact physical space while maintaining the electromagnetic field characteristics of a large shield room. This eliminates the need for a large physical shield room while preserving measurement accuracy
3Measurement precision
If both DUT and commercial 60 GHz 801.11ay AP support USB 3.1 or 5G LAN interface, then high throughput measurement is enabled, but an additional interface for testing must be added to DUT
Solution Approach 1:
The patent makes the DUT operate in AP mode, allowing it to function both as the device under test for RF characteristic measurement and as an access point for throughput measurement. This multi-functionality eliminates the need for additional dedicated test interfaces, reducing DUT interface complexity while maintaining high throughput measurement capability
Data Source
AI summary
Disclosed is an RF characteristic measurement system comprising: a shield box in which a DUT accessing a network on mobile by using an access point antenna and an antenna module is provided, which receives an RF signal of the AP antenna; a test device for generating the RF signal to be transmitted to the DUT, and measuring the RF characteristic of the DUT by using an RF characteristic signal received from the DUT; and a control device for controlling the operation of the DUT and the operation of the test device, wherein the test device includes: an attenuator for adjusting the output power of the RF signal to be input into the DUT; a transmission/reception path separator, which is electrically connected to the AP antenna and separates transmitted/received RF signals from each other; and an AP board, which is electrically connected to the attenuator and the transmission/reception path separator.