1A0920-3

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RF Directional Couplers are one of the most important components in the radio frequency engineering area. In the engineering circulation system, it has the effect of improving the linearity of the system signal and protecting the accidental damage of the load caused by the sudden short circuit. The 1A0920-3 is a broadband RF directional coupler manufactured by a company called Altronics.

The 1A0920-3 RF Directional Coupler is an optimized model specifically designed for a noise figure of less than 0.25 dB.It is a 50 ohm broadband coupler that is suitable for a wide range of applications from 1 to 6 GHz, such as radios, wireless communication systems, and so on. It has an insertion loss of less than 0.6 dB with a frequency range of 1 to 6 GHz, an isolation of more than 22 dB, and a directivity of more than 18 dB.

Its usage range is very wide, such as holding 50 ohm antennas, transmitting and receiving signals, limiting pulse widths, measuring, monitoring and analyzing signals in wave analysis systems, as well as providing a signal transfer and feed line in mobile network base stations. In addition, the RF Directional Coupler can also be used in swept frequency testing, phase stability measurement, and other testing and measurement related systems.

The working principle of 1A0920-3 RF Directional Couplers is based on the use of two parallel transmission lines. The primary line is connected to the input port while the secondary line is connected to the output port. Signals received by the input port is used to create a voltage at the primary line, which subsequently induces a voltage at the secondary line. This induced voltage is then diverted from the output port and is available for other measurements.

The power that is transferred from primary line to secondary line depends upon the degree of coupling between the two lines, also referred to as coupling coefficient, which is determined by the length of both lines and the spacing between them. The 1A0920-3 has an adjustable coupling coefficient that can be adjusted by altering the distance between the two lines. It is also possible to vary the frequency range of the directional coupler via adjustments of the capacitance and inductance of the two transmission lines.

In conclusion, 1A0920-3 RF Directional Couplers are a highly versatile and reliable component with a range of applications in RF engineering. With the coupling coefficient adjustable, this makes the RF directional coupler a powerful tool for signal transmission, wave analysis, and other testing and measurement related systems.

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