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[Application Example] Why is a radio wave shielded box necessary?

[Application Example] Throughput Testing and Reception Sensitivity Testing Environment via OTA

By using a radio wave anechoic chamber, it is possible to conduct OTA performance tests correctly in a stable environment without the influence of surrounding radio waves. This is particularly essential for evaluating EUTs in the 2.4GHz and 5GHz bands, such as WiFi devices, mobile phones, and terrestrial digital broadcasting equipment, as the anechoic chamber allows for the separation from commercial service waves. Additionally, for products that do not have technical standards conformity certification (Giteki), using a radio wave anechoic chamber (shielded box) is effective to prevent the emission of illegal radio waves. 【Product Lineup】 ■ Radio Wave Anechoic Chamber Taurus Series MY1510 ■ Radio Wave Anechoic Chamber Taurus Series MY1525 ■ I/F Module ■ Portable Antenna M301–309 *For more details, please refer to the PDF materials or feel free to contact us.

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Electromagnetic Shielding Box (Shield Box) Taurus Series MY1510

Compact size that is lightweight and easy to carry. Offered at a very affordable price of under 200,000 yen.

In inspections of wireless LANs and the like, using this product allows for the reduction of external noise and the effects of multipath occurring internally, enabling stable measurements. ■External dimensions: 380 (W) × 165 (H) × 380 (D) mm (excluding handles, etc.) ■Internal dimensions: 315 (W) × 100 (H) × 315 (D) mm ■Weight: Approximately 3.5 kg (excluding I/F module) ■Shielding performance: 70 dB typ @ 2.4 GHz ■Absorption performance: 20 dB or more (MYA-75: above 2.4 GHz) ■Connectors: 2 SMA (rear) ■I/F module: 1 unit (rear) ■Options: I/F module

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Electromagnetic Shielding Box (Shield Box) Taurus Series MY1520

The most versatile medium size that accommodates multiple uses. It has excellent workability with a front opening.

In inspections of wireless LANs and the like, using this product allows for the reduction of external noise and the effects of multipath occurring internally, enabling stable measurements. ■External dimensions: 520 (W) × 520 (H) × 520 (D) mm (excluding handles, etc.) ■Internal dimensions: 460 (W) × 460 (H) × 460 (D) mm ■Weight: Approximately 15 kg (excluding I/F modules) ■Shielding performance: 70 dB typ @ 2.4 GHz ■Absorption performance: Over 20 dB (MYA-75: above 2.4 GHz) ■Connectors: 2 SMA (rear) ■I/F modules: 2 units (rear) ■Options: - I/F module - Wooden table - Turntable unit - Wave absorber (MYA-77): 498,000 yen - Wave absorber (MYA-79): 648,000 yen

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Radio Wave Shielded Box (Shield Box) Hand-in Type MY3710

It is possible to directly operate with bare hands while looking inside through the shield window with the DUT (Device Under Test) still inside.

Ideal for evaluating mobile phones, smartphones, smartwatches, tablet devices, wearable devices, and portable game consoles with wireless communication functions. 【Features】 1. Direct operation of DUT (Device Under Test) with bare hands 2. Our unique shield window technology 3. Compact and lightweight 4. Easy operation with one-touch locking mechanism 5. Supports a variety of interfaces

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Radio Wave Shielded Box (Shield Box) Hand-in Type MY3720

It is possible to directly operate with bare hands while looking inside through the shield window with the DUT (device under test) still inside.

- The internal space has increased, allowing for weak field and out-of-range testing of large tablet devices, mobile PCs, and stationary wireless communication game consoles. - It is also ideal for digital forensic evaluation of mobile phones and smartphones. - It serves effectively as a substitute for a shielded room. 【Features】 1. Both hands can be inserted from the front for operation with bare hands, accommodating large DUTs. 2. Equipped with a large shield window measuring 275×255mm. 3. Supports a variety of interfaces.

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Large Type Electromagnetic Shielding Box MY5630/ET

Ideal for antenna development and communication characteristic evaluation of wireless devices such as radios.

●Enhanced body with high shielding performance (over 80dB) ●Maintenance door installed

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Electromagnetic Shielding Box (Shield Box) Special Type MY5550

On-site assembly type radio wave absorbing partition Achieving an ideal space for development at low cost and short delivery time.

● Realizing an ideal space at low cost and short delivery time ● No large-scale construction required with on-site assembly ● Short construction period (1 day for basic installation work + 1 day for installation of wave-absorbing materials) ● Optimal for verifying the directivity and gain of antennas mounted on 5th generation mobile communications, millimeter-wave radar, simulating various communication tests, and applying/developing vehicle-mounted sensing technology.

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[Application Example] DLNA High-Speed Data Transmission Evaluation System

Evaluation of the performance of wireless LAN access points and client devices during the transmission of compressed large-capacity video/audio data.

- Protect data from adjacent frequencies that interfere with the carrier during data transmission. (For wireless LAN access points) - Connect decoded video/audio data to external devices for real-time verification (client terminal) - Use a high-speed programmable attenuator to create a simulation environment with added distance attenuation. By eliminating unwanted factors due to external influences, we check for dropped frames and freezing situations during playback on the client terminal side, especially when transmitting Hi-Vision size video from the access point. 【Product Introduction】 - Radio Shielded Box MY1520SW - I/F Module - SMA Cable - High-Speed Programmable Attenuator MAT800 - Dipole Antenna M306 *For more details, please refer to the PDF materials or feel free to contact us.

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[Application Example] Evaluation Environment for MIMO High-Speed Wireless LAN

[Application Example] Introducing useful equipment for developing and evaluating wireless devices compatible with wireless LAN.

In recent years, some wireless LAN devices have been transitioning from high-throughput methods like SISO to MIMO to accommodate the increasing communication volume. Additionally, various electronic devices beyond information and communication equipment are incorporating RFICs for wireless LAN, and this trend is becoming more pronounced. We would like to introduce useful equipment for developing and evaluating wireless devices compatible with wireless LAN in this application. 【Product Introduction】 ■ Shielded Room Taurus Series MY1510 ■ Shielded Room Taurus Series MY1515 ■ Shielded Room Taurus Series MY1520 ■ Shielded Room Taurus Series MY1530 ■ High-Speed Programmable Attenuator MAT800 Series *For more details, please refer to the PDF materials or feel free to contact us.

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The ideal shielded box for aging tests.

[Application Example] Ideal Shielded Box for Aging Tests

Aging refers to the operational testing conducted on electronic devices and machinery before shipment, or the break-in operation performed before they are put into use. It means running the equipment for a certain period before actual use to check for initial defects and to wait until it operates stably. Generally, when conducting aging tests or heat run tests for wireless devices, base stations, PCs, etc., inside a radio wave dark box (shield box), the internal temperature of the box can rise due to heat dissipation from the equipment itself, which may lead to malfunctions or shutdowns of these devices. Our company offers radio wave dark boxes (shield boxes) equipped with intake and exhaust mechanisms suitable for aging tests. Of course, while equipped with ventilation fans, the shielding performance remains at a high level. *For more details, please refer to the PDF materials or feel free to contact us.

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Smartphone/Next-generation STB development electromagnetic shield box

[Application Examples] Development of multimedia broadcasting for mobile devices and next-generation STB terminals.

Using an anechoic chamber, we will develop multimedia broadcasting for mobile devices and next-generation STB terminals. We can provide a simplified testing space for interactive communication tests, etc. 1. Communication quality testing (blocking external noise such as mobile phone base stations and nearby interference) 2. Image condition verification during accumulated broadcasting reception (checking for image dropouts and freezes) 3. Interconnectivity verification tests for tethering functions, etc. (IOT tests, etc.) 【Product Introduction】 ■ Anechoic Chamber Taurus Series MY1510 ■ I/F Module IFM1 ■ Portable Antenna M304 *For more details, please refer to the PDF materials or feel free to contact us. 【System Configuration】 ■ Anechoic Chamber Taurus Series MY1510 *modified ■ I/F Module IFM1 ■ Portable Antenna M304 *For more details, please refer to the PDF materials or feel free to contact us.

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[Application Example] How to Utilize Web Cameras in Hand-in Radio Wave Dark Boxes

[Application Example] By adding an I/F module to the hand-in RF shielded box, it becomes possible to capture images of the DUT using a web camera.

The hand-in RF shielded box allows you to place devices under test (DUT) such as mobile phones, smartphones, smartwatches, tablet devices, wearable devices, and handheld game consoles with wireless communication functions into the RF shielded box. You can view the inside through the shielded window and operate the devices directly with your hands. Here, we will introduce a method for capturing the screen of the DUT. 【Product Introduction】 ■ Hand-in RF Shielded Box (Shield Box) MY3710 ■ IF Module IFM1 *For more details, please refer to the PDF document or feel free to contact us. An I/F module can be added as an option to the hand-in RF shielded box. By using an I/F module with a USB connector (such as IFM1), you can operate a USB-connected webcam installed inside the RF shielded box from a PC outside the box, allowing you to capture the screen of the DUT. 【System Configuration】 ■ Hand-in RF Shielded Box (Shield Box) MY3710 ■ IF Module IFM1 ■ Webcam (commercially available) *For more details, please refer to the PDF document or feel free to contact us.

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Radio Wave Dark Box (Millimeter Wave Compatible) 'MY6520'

Customizable! Millimeter wave compatible, compact, lightweight, and affordable domestic electromagnetic shielding box.

The "MY6520" is a compact and cost-effective RF shielded chamber (millimeter wave compatible) suitable for simple OTA testing (protocol functions, throughput, etc.) of 5G NR compatible terminals, devices, and chipsets. It supports frequencies from 700 MHz to 30 GHz and can be used for evaluations in both standalone (SA) and non-standalone (NSA) modes of 5G NR. 【Features】 ■ A small, lightweight, and affordable RF shielded chamber specialized for protocol function testing ■ Reduced internal reflections due to the characteristics of pyramid-shaped RF absorbers ■ Standard equipment includes a low-reflection EUT table and antenna mounting table ■ Factory options allow for the addition of RF connectors and changes to interface specifications ■ One-touch locking mechanism (with key) ■ Customization options available *For more details, please refer to the PDF materials or feel free to contact us.

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Broadband electromagnetic field uniformity in a dark box.

[Application Example] A broadband electromagnetic shielded chamber suitable for the development of multi-band/UWB radio devices and EMC evaluation.

【Product Introduction】 ■Handheld Spectrum Analyzer Compact, lightweight, battery-operated (low power consumption), and low cost. Despite being a handheld type, it offers performance comparable to larger models. ■EMI Shielded Enclosure/Shield Box Low cost, lightweight, and short delivery time! High-quality, reliable, and cost-effective EMI shielded enclosures and shield boxes provided by a measurement instrument manufacturer. There is an increasing demand to establish test environments that require wideband capabilities, such as the development of multi-band/UWB wireless devices and EMC evaluations, at the lowest possible cost. By achieving such environments with an EMI shielded enclosure, initial investment for setting up the environment can be minimized, and easy debugging can contribute to reducing the development turnaround time.

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Comparison of Electromagnetic Shielding Performance

[Application Example] This is a comparison of the shielding performance between MY1510 and other companies' (overseas) RF shielded enclosures.

【Product Introduction】 ■Radio Wave Dark Box / Shield Box Taurus Series MY1510 A lightweight and portable compact size. Offered at a very affordable price of under 200,000 yen. ■IF Module A module equipped with AC, DC, LAN, USB, SMA, BNC, N, D-sub connectors and feedthroughs. An interface (such as AC power, LAN, USB ports, etc.) for connecting devices is essential for a radio wave dark box. When choosing a radio wave dark box, one of the performance metrics is its shielding performance, and it is crucial to consider whether this performance includes the interfaces. In fact, it is not an exaggeration to say that the performance of the interface section determines the shielding performance of the radio wave dark box. This application note compares the shielding performance of MY1510 (+IFM-1) with that of other overseas products. Micronix's radio wave dark box achieves stable shielding performance even with the implementation of interfaces.

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Shield box application examples

【Technical Data】Electromagnetic Shielding Box / Shielded Box ME8661A Application Examples

■Radio Wave Dark Box / Shield Box ME8661A Ideal for communication quality testing and antenna testing of mobile phones, wireless LANs, and wireless communication devices through spatial coupling. 【Application Examples】 1. Transmission characteristic testing of wireless communication devices via antenna connection 2. Reception sensitivity testing of wireless communication devices via antenna connection 3. Transmission characteristic testing of wireless communication devices via cable connection 4. Protocol testing of wireless communication devices using antennas

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Can directional antennas actually transmit radio waves to the intended location?

[Application Case] Demonstrating the Truth and Lies of Wi-Fi

【Product Introduction】 ■Radio Wave Dark Box / Shield Box Taurus Series MY1530 A large size that accommodates large test objects. A turntable can be installed as an option. When you stop in front of a station in the city and look up, you may see Wi-Fi (wireless LAN) antennas among various antennas on the rooftops of buildings. From what I have observed, it seems that many Wi-Fi antennas are "directional antennas" designed to transmit signals in a specific direction.

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Radio wave shielding box system for production lines

[Application Example] Communication Evaluation of Wireless Modules

【Product Introduction】 ■Handheld Spectrum Analyzer Compact, lightweight, battery-operated (low power consumption), and low cost. Despite being handheld, it offers performance comparable to larger models. ■Anechoic Chamber / Shielded Box Low cost, lightweight, and short delivery time! High-quality, reliable, and cost-effective anechoic chambers and shielded boxes provided by a measurement instrument manufacturer. The anechoic chamber has the following functions, allowing for accurate characteristic measurements of the DUT (Device Under Test): 1. Provides an environment unaffected by external electromagnetic waves. 2. Blocks leakage of electromagnetic waves to the outside. 3. Reduces interference within the anechoic chamber. By leveraging these characteristics and combining them with other measuring instruments and testing evaluation terminals, they can be permanently installed as production line equipment for quality inspection and functional testing of various wireless module-equipped devices (such as wireless LAN and Bluetooth).

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I tested the function that disconnects devices that continue to connect to WiFi despite poor signal.

[Application Case] Demonstrating the Truth and Lies of Wi-Fi

In the previous installment of this series, it was revealed that in the experiment introduced, it is not the access point (AP) but the terminal side that determines the timing for executing roaming over Wi-Fi (wireless LAN). Additionally, it became clear that some terminals do not roam quickly and only change their connection to the next AP after a while following a communication interruption. 【Product Introduction】 ■ Radio Shield MY1530 ■ High-Speed Programmable Attenuator MAT810 *For more details, please refer to the PDF document or feel free to contact us.

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Is it really possible to be connected to Wi-Fi but unable to communicate?

[Application Case] Demonstrating the Truth and Lies of Wi-Fi

【Product Introduction】 ■Radio Shielded Box MY1530 *For more details, please refer to the PDF document or feel free to contact us. There are likely many readers who have the impression that "Wi-Fi (wireless LAN) comes with its share of troubles." I often hear stories like "the connection drops" or "I feel like the Wi-Fi connection got slower when I moved to the conference room with my PC." Among these troubles, what has been on my mind recently is the issue of "the Wi-Fi icon is displayed on the smartphone screen, but there is no connection" or "I moved a little and lost the connection. But it didn't switch to LTE either." These are frustrating troubles that are hard to understand, but they actually occur frequently. There are various causes, and this time I will introduce a case where "differences in signal strength between devices" is a contributing factor. *For more details, please refer to the PDF document or feel free to contact us.

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Is it true that Wi-Fi stops when it detects radar waves?

[Application Case] Demonstrating the Truth and Lies of Wi-Fi

【Product Introduction】 ■Radio Wave Dark Box MY1530 *For more details, please refer to the PDF document or feel free to contact us. Wi-Fi (wireless LAN) communication uses the 2.4GHz and 5GHz bands. Among these, the 2.4GHz band is also used by devices such as microwave ovens and cordless phones, and it is widely known that these can interfere with Wi-Fi communication. *For more details, please refer to the PDF document or feel free to contact us.

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A hard-to-believe story related to Xmas and Wi-Fi

[Application Case] Demonstrating the Truth and Lies of Wi-Fi

【Product Introduction】 ■Radio Wave Dark Box MY1530 *For more details, please refer to the PDF document or feel free to contact us. Christmas is just around the corner. Speaking of Christmas, around this time last year (2015), I came across several articles on various websites stating that "Christmas lights could slow down Wi-Fi (wireless LAN)." Tracing back the source of the discussion, it was mentioned in an introduction to a certain Wi-Fi connection verification app as an example of interference, citing "microwaves, baby monitors, and Christmas lights." The interference between microwaves and Wi-Fi is a well-known issue. It is also easy to imagine that baby monitors transmit audio and video using wireless technology. It wouldn't be surprising if other household appliances we commonly use also interfere with wireless LAN signals. However, the idea that "Christmas lights" could cause interference is hard to believe. *For more details, please refer to the PDF document or feel free to contact us.

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Is high-speed "channel bonding" only a good thing?

[Application Case] Demonstrating the Truth and Lies of Wi-Fi

【Product Introduction】 ■Radio Wave Dark Box MY1530 A large size that accommodates large test objects. A turntable can be installed as an option. For 802.11n and 11ac, there is a technology called channel bonding that allows multiple channels to be combined (i.e., expanding the frequency width used) to increase the communication bandwidth, as shown in Figure 1. In particular, with 802.11ac, bonding can be done over a width of 80MHz, equivalent to four channels. This results in approximately four times the communication speed compared to a 20MHz width. *For more details, please refer to the PDF document or feel free to contact us.

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Is it true that you can use WiFi communication even 100 meters away from the access point?

[Application Example] Demonstrating the Truth and Lies of Wi-Fi

"How far can Wi-Fi (wireless LAN) communicate?" This is one of the questions frequently asked by users, but it cannot be easily answered as various conditions are involved. I have seen various news articles and reports on long-distance wireless LAN communication experiments in the past, but what left an impression on me was the story of a successful wireless LAN communication test between islands. It was surprising to hear that they achieved communication over approximately 60 km using antennas with high directionality and gain on both the receiving and transmitting sides. [Product Introduction] ■ Radio Wave Dark Box MY1530 ■ High-Speed Programmable Attenuator MAT810 *For more details, please refer to the PDF materials or feel free to contact us.

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