1D1304-3

Series:	Xinger®
Packaging:	Tape & Reel (TR)
Part Status:	Active
Coupler Type:	Standard
Frequency:	800MHz ~ 1.2GHz
Coupling Factor:	--
Applications:	General Purpose
Insertion Loss:	0.25dB
Power - Max:	150W
Isolation:	22dB
Return Loss:	--
Package / Case:	4-SMD, No Lead
Supplier Device Package:	--

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Introduction:

RF directional couplers are passive components commonly used in radio frequencies (RF) circuits and system architectures. They are used to couple, distribute and combine signal power from a signal source to various other RF nodes. In addition to their use in power and signal distribution applications, RF directional couplers are also used in a variety of test and measurement applications. One such device is the 1D1304-3 model from TDK-Lambda. This article will discuss its application field and working principle.

Application Field:

The 1D1304-3 is a high isolation RF directional coupler typically used in RF amplifier circuits in a wide variety of industries such as instrumentation, military, industrial automation, telecommunications, and defense. It can be used as a reference port or as a means to monitor power in RF amplifier systems. It is useful in many applications where accurate power measurements are required.In terms of RF amplifier systems, the 1D1304-3 has a very wide range from 1 MHz to 6GHz, with excellent isolation between both sides, so it can be used to monitor and couple the signal power at multiple points in a circuit. This allows for monitoring of the signal power level and regulation, as well as exact circuit design, allowing for high-accuracy tuning and adjustment.With its excellent RF characteristics, the 1D1304-3 can also be used in communications systems. It offers very low parasitic reactance losses and contributes to the efficient propagation of signals between a transmitter and receiver. It also offers excellent balance of impedance, allowing for efficient power transmission in a balanced network.In general, the 1D1304-3 is a highly reliable RF directional coupler that is very versatile and is suitable for a variety of fields and industries.

Working Principle:

The 1D1304-3 is a balanced RF directional coupler, meaning it is composed of three cores: the internal signal/measurement source, the signal output, and the reference port. The reference port can either be a direct connection to the signal source, or an open connection to the system. The internal structure consists of two striplines that run between the signal/measurement source and the signal output. One of the striplines is used to couple the signal from the source to the output, while the other stripline measures the power level. The measured power is then combined with the output signal, providing an accurate measure of the power level of the signal source.The reference port is placed at the midpoint between the signal source and output, making it the most important part of the device. It is used to balance the impedances between the source and output, and can also be used as a transmission line for transmitting signals to other ports or to measure the signal power levels. In general, the 1D1304-3 is a reliable andhighly accurate RF directional coupler with a wide range of applications, offering excellent power coupling and high isolation, as well as a balanced power and impedance in communications systems.

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