C0810J5003AHF RF/IF and RFID

Series:	Xinger®
Packaging:	Tape & Reel (TR)
Part Status:	Active
Coupler Type:	Standard
Frequency:	800MHz ~ 1GHz
Coupling Factor:	3dB
Applications:	CDMA, WCDMA
Insertion Loss:	0.5dB
Power - Max:	4W
Isolation:	23dB
Return Loss:	31dB
Package / Case:	0805 (2012 Metric)
Supplier Device Package:	0805 (2012 Metric)

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RF Directional CouplersA RF (radio frequency) directional coupler is a four-terminal passive device used to sample a signal from a transmission line. It is commonly used in radio frequency applications to provide a means of isolating the transmitting and receiving antennas from each other and to measure the power in the forward and reflected directions. The C0810J5003AHF is a directional coupler designed specifically for RF applications. It features a power rating up to 25 Watts and a frequency range from 500kHz to 18.0GHz. In this article, we will discuss the application field and working principle of the C0810J5003AHF. Application FieldThe C0810J5003AHF has a wide range of applications including RF transmission, RF receivers, signal generators, antenna systems, and so on. In RF transmission, the directional coupler is utilized as a matching network element to ensure the power transfer from the transmitter to the antenna is optimized. In RF receivers, the directional coupler is used to measure the forward and reflected power, which is important in monitoring and optimizing receiver sensitivity. In signal generators, the directional coupler is used for forward power and return loss measurements. In antenna systems, the directional coupler is used to measure the antenna gain and SWR (Standing Wave Ratio). These are just some of the applications of the C0810J5003AHF. Working PrincipleThe operation of a directional coupler is based on two transmission lines. The two lines are arranged in parallel and each one operates independent of the other. One of the two lines is referred to as the ‘main line’, while the other is referred to as the ‘coupling line’. The purpose of the coupling line is to capture a portion of the signal traveling in the main line. The level of the signal captured in the coupling line is determined by the geometry of the lines and the spacing between them. The geometry of the lines and the spacing determine the amount of power that is transferred from one line to the other, which is referred to as the coupling factor. The higher the coupling factor, the more power is transferred.In the C0810J5003AHF, the coupling factor can be adjusted from 10dB to 30dB. The lower the coupling factor, the more accurate are the measurements. With an adjustable coupling factor, the C0810J5003AHF provides the flexibility needed for a wide range of applications.ConclusionThe C0810J5003AHF is a directional coupler designed specifically for RF applications. It features a power rating up to 25 Watts and a frequency range from 500kHz to 18.0GHz. This device is used in a variety of applications including RF transmission, RF receivers, signal generators, and antenna systems. The working principle of the C0810J5003AHF is based on two intimately spaced transmission lines. The level of signal captured in the coupling line is determined by the geometry of the lines and the spacing between them. With an adjustable coupling factor, the C0810J5003AHF gives the user the flexibility needed for a wide range of applications.

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