General
Frequency range	0 to 8 GHz
Connection type	RP-SMA (male)
Impedance	50 Ohm
VSWR	1,25
Return loss	22 dB @ 8 GHz

The A-TRM-50-RM is a 50-Ohm termination resistor from Moxa, equipped with an RP-SMA plug (male), and is used for signal termination in high-frequency applications up to 8 GHz. It is employed to minimize signal reflections at the end of an RF signal line, thereby maintaining signal integrity in sensitive systems such as antenna, test, and communication installations. The use of a termination resistor is particularly important when a coaxial cable is not connected to a matching device, to avoid disturbances caused by reflected signals.

Applications

The A-TRM-50-RM is designed for use in 50-Ohm systems found in telecommunications, laboratory operations, and field applications. It is suitable, for example, for terminating antenna cables when no active load is connected, or as a test aid in the development and maintenance of radio systems. Its compact design allows for flexible installation, even in limited space conditions.

Functions and Features in Detail

The termination resistor provides an impedance of 50 Ohm, which is standard in high-frequency systems to ensure optimal power transfer. The VSWR (Voltage Standing Wave Ratio) is 1.25, indicating excellent impedance matching and resulting in low reflection losses. The return loss is 22 dB at 8 GHz, meaning that most of the incoming power is converted into heat and not reflected. These values are critical for the stability and reliability of high-frequency systems.

Technology Explained Simply

A termination resistor is used to match the end of a coaxial cable to the cable's impedance, preventing reflections. In a 50-Ohm system, a 50-Ohm resistor is placed at the cable end. The RP-SMA plug (male) is a standard connector in high-frequency technology, ensuring a secure mechanical and electrical connection. The frequency bandwidth of 0 to 8 GHz makes the A-TRM-50-RM suitable for a wide range of applications, including modern wireless networks and test systems.

Compatibility and Accessories

The A-TRM-50-RM is compatible with all devices featuring an RP-SMA connector (female) and operating in 50-Ohm systems. It can be directly used on antenna cables, test equipment, or radio modules that support this connector.

Installation and Mounting

Installation is performed by simply inserting the RP-SMA plug into the corresponding female connector. No additional tools or mounting aids are required. The connection is mechanically stable and designed for use in laboratory and field environments.

Operational Advantages

The low VSWR and high return loss optimize signal quality in high-frequency systems. This leads to improved system stability, reduced interference, and extended lifespan of connected devices. The compact design and universal connector simplify integration into existing systems.