1D0220-3

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

RF Directional Couplers are widely used in communication systems for power measurement, spectrum monitoring and various protection functions. An RF Directional Coupler, such as Model 1D0220-3, is composed of an insulator, a metallic RF branch line, and an RF connector, as seen in Figure 1. It is typically used to transfer a portion of a signal from one line to another without significantly affecting the forward signal, which is achieved due to its directional properties.

Figure 1: Model 1D0220-3 RF Directional Coupler

As mentioned, an RF Directional Coupler can transfer a portion of a signal from one line to another. It does this by supplying four ports or terminals on the device, designated by port 1, port 2, port 3, and port 4. Port 1 is typically the input and port 2 is typically the main output (see Figure 2). Port 3 is referred to as the “coupled output" and is usually connected to a power meter. This is because the 1D0220-3 RF Directional Coupler can be used to measure the amount of power, or RF energy, being circulated in a system. Meanwhile, port 4 is typically the “transmission line" and is usually a termination, meaning it is connected to a device that absorbs the signal, such as an AC short.

Figure 2: Parameters of Model 1D0220-3 RF Directional Coupler

The working principle of an RF Directional Coupler consists of two components: the coupled line and the RF branch line. The coupled line is composed of an insulator, which is typically made of ceramic and surrounds the RF branch line. Here, a rotating magnetic field is set up by the radio frequencies, which are broadcast along the branch line. This rotating magnetic field can then pass into the output line, from port 3, due to the symmetry of the device. Furthermore, the degree to which the RF branch line and output line are linked together is known as the coupling factor. The 1D0220-3 Directional Coupler, for example, has a coupling factor of 12 dB, meaning that 12 dB of energy is transmitted on the output line if no losses occur.

For the purpose of discussion, let’s consider a situation where the 1D0220-3 Directional Coupler is connected to a signal generator and an RF power meter. In this case, the signal generator is connected to port 1, the RF power meter is connected to port 3, and port 2 is considered an open load. As the signal is broadcast by the signal generator, some of the energy is transmitted to the power meter, where the signal strength is measured.

The 1D0220-3 RF Directional Coupler can be used in many applications, such as signal monitoring, measuring power output, signal absorption, and frequency filtering. In addition, it is also useful in spectrum monitoring, providing a way to measure the signal strength of various frequencies. Additionally, it is ideal for various protection functions, such as automatic shutdown of power supply, temperature monitoring, and peak detection.

As demonstrated, the 1D0220-3 RF Directional Coupler is a useful device because of its directional properties and ability to provide accurate measurements of power output in communication systems. With the increasing demand for high-performance telecommunication systems, the use of these devices is expected to grow. The 1D0220-3 is able to fulfill these requirements, offering a new level of performance in terms of signal strength measurement, frequency filtering, and signal absorption.

The specific data is subject to PDF, and the above content is for reference