RN142-1.4-02

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Common Mode Chokes are an essential component of electrical systems that reduce electrical noise generated by the equipment. They are used to limit the level of electromagnetic interference (EMI) from the system, which is a necessary part of the modern day system of electrical communication and processing. RN142-1.4-02 is a type of Common Mode Choke used in various applications and uses the principle of magnetic field induction.

Common Mode Chokes provide common mode impedance for electromagnetic interference reduction. They are typically used between power and ground cables of the system in order to reduce the common mode impedance and thus reduce the common mode noise. Additionally, they are used between digital input/output signals and ground connections to provide improved signal integrity. Common Mode Chokes filter an alternating current signal with multiple frequencies, reducing higher frequency components significantly. The remaining common mode components are blocked while allowing desired current to pass.

The RN142-1.4-02 Common Mode Choke is designed to reduce common mode noise in the signal and data transmission in the range of 1.4 GHz. The working frequency range is from 1.5 MHz to 2.4 GHz. It provides excellent suppression of common mode currents and helps reduce interference to near-field antennae. It has an impedance of 250 Ohms and is rated to handle up to 5 amps. It has a low insertion loss of ≤ -1.5 dB at 1.4 GHz, in addition to high impedance and a return loss better than -12 dB. The operating temperature range is between -25 and +85 degrees Celsius.

The RN142-1.4-02 is a good fit for various applications. These include radio frequency (RF) power amplifiers, RFID readers, Cellular, DVB-T, WiFi, WiMAX, and IoT wireless communication vehicles, and any type of EMI prevention applications. This choke is also well suited for DC power off conditions, since it causes a significant reduction in power-off capacitance discharge current. It can be used in a free-air environment, which eliminates additional packaging and housing costs.

The RN142-1.4-02 Common Mode Choke works on the principle of magnetic induction. When AC currents run through their windings, alternating magnetic fields are generated which put the choke in a mode of inductance. The alternating AC currents cause AC electromagnetic signals to propagate on both sides of the windings and interact with each other in the primary circuit, forming a secondary magnetic field. The induced secondary magnetic field in the windings creates a counter force to the alternating magnetic fields in the primary circuit and induce a voltage. The voltage generated on the windings will be opposite in polarity in voltage, the polarity will create a counter current, this is known as the counter EMF, or the back EMF. The counter EMF works against the current and is called the back EMF. This counter EMF is then deducted from the total current and resistance, thus reducing the noise.

In conclusion, the RN142-1.4-02 Common Mode Choke is an ideal choice for EMI noise reduction applications in electrical systems. It is an effective way of limiting and suppressing the noise generated by the equipment as well as improving signal integrity. It works on the principle of magnetic induction, which creates counter EMF and resistance. It is designed for use in frequencies of 1.5 MHz to 2.4 GHz and provides excellent suppression of common mode currents. This choke has a wide variety of applications from RF amplifiers to Cellular to signal and data transmission.

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