多摩川電子 List of Products and Services

We would like to introduce a case where "SCM for train radio, optical transmission, and shared devices for onboard radio equipment" were implemented in transportation wireless equipment. In wireless systems that facilitate communication between trains and the operations command center, there is the LCX (leaky coaxial cable) communication method as a means of communicating with moving trains. The optical relay system converts radio signals into optical signals for transmission, relaying between the optical master station and optical sub-stations. Our company provides optical conversion units, amplifiers, attenuators for use in the optical relay system, as well as coaxial filters and shared devices for onboard radio equipment. [Case Overview] ■ Implementation Location: Public Social Infrastructure (Transportation Wireless Equipment) ■ Implemented Products: SCM for Train Radio, Optical Transmission, Shared Devices for Onboard Radio Equipment *For more details, please refer to the related links or feel free to contact us.

• Other electronic parts

We would like to introduce a case where "Optical Power Supply ROF (Receiver)" was implemented in EMC testing equipment. The receiver, which detects RF signals using optical energy for power supply, is electrically insulated, allowing for low disturbance and continuous measurement. Since optical fibers have extremely low transmission loss, high-frequency (RF) signals can be transmitted without loss and are not affected by radio waves. Additionally, optical fibers are made of insulating materials, and they convert and transmit signals from current probes into light, eliminating any influence from induction. 【Case Overview】 ■ Implementation Location: FA (EMC Testing Equipment) ■ Implemented Product: Optical Power Supply ROF (Receiver) *For more details, please refer to the related links or feel free to contact us.

• Other electronic parts

This column introduces fiber optic power supply technology and its applications. It explains the operating principles of fiber optic power supply, examples of system configurations, the principles of optical conversion, and examples of sensor heads using diagrams and photographs. Utilizing the low loss of fiber optics (0.3dB/km), it presents technology that transmits energy through fiber optics and supplies power over distances of several kilometers, even in locations without a power source. 【Contents】 ■Introduction ■Examples of fiber optic power supply applications *For more details on the column, you can view it through the related links. Please feel free to contact us for more information.

• Other electronic parts

We would like to introduce a case where a "Optical Link for Satellite Ground Stations" was implemented in satellite ground station equipment. Radio waves from space, such as satellite broadcasting (BS, CS), are received by remote antennas on the ground. The received signals are downconverted (frequency converted) and transmitted as IF signals from the antenna to the station (receiver). The distance between the antenna and the station is several hundred meters to several kilometers, and using coaxial cables results in significant loss, so we use an optical transmission device called "RoF" that employs fiber optics. 【Case Overview】 ■ Implementation Location: Space and Satellite Related (Satellite Ground Station Equipment) ■ Implemented Product: Optical Link for Satellite Ground Stations *For more details, please refer to the related links or feel free to contact us.

• Other electronic parts

Here is an introduction to a case where a "frequency combiner (for mobile phone base stations)" was introduced into base station equipment. This product is used when sharing multiple frequency radio signals or when separating shared signals, with the aim of reducing the number of power supply lines from each base station and separating the necessary frequencies for the shared antenna. In the case of an infrastructure sharing system, it can be used when sharing and separating the radio signals of each mobile phone operator. [Case Overview] ■ Installation Location: Mobile phone-related (base station equipment) ■ Installed Product: Frequency combiner (for mobile phone base stations) *For more details, please refer to the related links or feel free to contact us.

• Other electronic parts

We would like to introduce a case where the "Aviation-Mounted Radio Reception Front End" was implemented in government agencies' onboard equipment. This product is designed for aircraft-mounted radio detection devices and features a configuration that minimizes amplitude and phase differences to the utmost extent, enabling wideband reception. Additionally, it is capable of withstanding harsh environments (MIL standards compliant) required for aircraft-mounted equipment. 【Case Overview】 ■ Implementation Location: Government Agencies (Onboard Equipment) ■ Implemented Product: Aviation-Mounted Radio Reception Front End *For more details, please refer to the related links or feel free to contact us.

• Other machine elements

Our company has a long history of delivering high-frequency power FET test equipment to major semiconductor manufacturers in Japan. We offer custom solutions tailored to various functions based on our customers' applications, such as reliability testing for newly developed devices and usage on production lines. Additionally, leveraging our expertise as a designer and manufacturer of high-frequency components, we provide customized designs for fixtures that accommodate increasingly compact and complex device packages, considering high-frequency characteristics, as well as long-term maintenance in line with customer requests. 【Case Overview】 ■ Installation Site: FA (Semiconductor Testing Equipment) ■ Installed Product: Semiconductor Burn-In Equipment (RF/DC) *For more details, please refer to the related links or feel free to contact us.

• Semiconductor inspection/test equipment
• Thermostatic chamber

We would like to introduce a case of implementing a "transceiver for satellite installation" on an artificial satellite. By utilizing a large number of commercial off-the-shelf components, this product significantly reduces costs compared to conventional products, making it possible to manufacture at a lower price. Although commercial components are used, we conduct environmental tests such as thermal vacuum tests, vibration tests, and shock tests to confirm normal operation in the space environment. 【Case Overview】 ■ Implementation Location: Space and Satellite Related (Artificial Satellite) ■ Implemented Product: Transceiver for Satellite Installation *For more details, please refer to the related links or feel free to contact us.

• Other electronic parts

We would like to introduce a case where the "Airport DAS System" was implemented in transportation wireless equipment. The Optical DAS System (Optical Fiber DAS, Distributed Antenna System, Optical Repeater) is an optical transmission system designed for countermeasures against dead zones, aimed at increasing the number of lines and functionality. It has scalability at the unit level, making it easy to expand the wireless area. By operating in conjunction with monitoring applications using Ethernet, it allows for the monitoring of equipment in operation, and in the event of an anomaly, it also has a reporting function that sends notifications to registered users via email. 【Case Overview】 ■ Installation Location: Public Social Infrastructure (Major Domestic Airports) ■ Installed Product: Airport DAS System *For more details, please refer to the related links or feel free to contact us.

• Other electronic parts

In mobile phone base stations, various methods are used to establish the necessary communication areas depending on the installation location. For outdoor area base stations, small low-power units and large high-power base stations are utilized according to the coverage range of the communication area in urban, suburban, and mountainous regions. Additionally, for indoor area base stations, indoor antenna sharing systems are used to cover areas where radio waves are difficult to reach, such as each floor of high-rise buildings, subways, and underground shopping streets. At Tamagawa Electronics, we provide components for 5G base stations, including coaxial attenuators for adjusting mobile phone signal levels and combiners and splitters for branching antennas, available in both outdoor and indoor types according to the installation area. *For more details, please refer to the related links or feel free to contact us.*

• Other electronic parts

Here is an example of the "Front-End Module for Active Phased Array Radar" introduced to government agencies. Radar sites installed in various locations across Japan monitor and guard the area and surrounding airspace. In recent years, active phased array radars have become mainstream, aiming to improve responsiveness to low RCS targets such as projectiles. Tamagawa Electronics has a track record of introducing front-end modules that up/down convert frequencies in the RF band directly below the antenna and in the baseband IF band. [Case Overview] - Installation Site: Government Agencies (Radar) - Product Introduced: Front-End Module for Active Phased Array Radar *For more details, please refer to the related links or feel free to contact us.

• Other electronic parts