アールエフティ List of Products and Services

RF Tech Co., Ltd. develops wireless communication devices ranging from the HF band (100 MHz) to the microwave band (several GHz), as well as peripheral control devices, firmware design, FPGA design, application development for device control PCs, application development for mobile tablet devices, and the design and manufacturing of telemetry and other devices utilizing wireless communication technology. Through our extensive track record, the inheritance of know-how, the implementation of advanced simulations, and thorough design reviews, we achieve high-quality designs. *For more details, please download the PDF or feel free to contact us.

• Communications

**Features** Aviation radio communication utilizes amplitude modulation (AM modulation), which has poorer sound quality, rather than frequency modulation (FM modulation), which has better sound quality. FM modulation is known for its effectiveness in areas with less interference and fewer radio disturbances. However, in aviation radio, signals may be transmitted from two ground stations to one aircraft, and with FM modulation, weak signals can be canceled out by stronger signals, making it difficult to hear one side clearly. In AM modulation, the characteristic that allows the user to know when communication is coming from the other side is utilized, enabling sequential communication. This transmitter employs high-gain LDMOS in the final stage PA to leverage the features of AM modulation, reducing the number of devices used from the conventional block configuration, achieving high efficiency, low power consumption, and cost reduction. *For more details, please download the PDF or feel free to contact us.*

• High frequency/microwave parts

**Features** This is a low-noise amplifier for GNSS (Global Navigation Satellite System). By combining two types of SAW filters, a relative attenuation of over 30dB (compared to 1495.9–1510.9MHz and 1555MHz) is achieved for the L1 (1575.42MHz) and L2 bands (1227.06MHz). It supports various positioning systems, including GPS and the Quasi-Zenith Satellite System (QZSS), and can amplify signals with low noise. Additionally, the power supply is superimposed on the coaxial cable to simplify wiring. *For more details, please download the PDF or feel free to contact us.*

• High frequency/microwave parts

【Features】 This is a simple synthesizer of a non-isolating type. It has a design that allows for easy frequency changes. *For more details, please download the PDF or feel free to contact us.*

• High frequency/microwave parts