STW82103B

RF mixers are a type of radio-frequency circuit component or device that combines an input signal with a local oscillator signal to produce an output signal with a new frequency, the intermediate frequency of (IF). A high-performance mixer is often specified with low intermodulation distortion, low harmonics, as well as good rejection performance of signals undesired by the circuit.

One example of a mixer is the STW82103B mixer. This device is a high-performance and low cost, dual-gate MOSFET mixer that is available with an integrated balun. The combination make it particularly suitable for applications such as digital and analog TV broadcast (ISTB-T, DVB-T/H and ATSC).

The STW82103B integrates two same-frequency dual-gate MOSFETs system that make them ideal for a variety of RF mixing applications. They provide good isolation between input and output signals, giving a high port-to-port isolation of over 40 dB up to 75 MHz. The two MOSFETs are low cost and have a low power consumption of only 15 mA.

The STW82103B is designed for an input frequency of 15 to 50 MHz and an output frequency of 1.5 to 8.75 MHz. Its power supply range is between 9V and 12V and can be used at power levels up to 100 W. Its maximum gain is 17 dB at an operating frequency of 25 MHz with a noise figure of 5.8 dB. The total harmonic distortion (THD) is typically less than 0.1% at 25MHz. The operating temperature range is -40 to +85°C.

In terms of its working principle, the STW82103B is a passive device. It operates by combining two signals using a process called mixing. This process involves combining two RF signals together, usually one from the antenna and the other from the local oscillator. The output is a combined signal with both the original signals present, but their frequencies are now different (shifted). The STW82103B is particularly useful for signal processing applications where multiple signals need to be combined and filtered.

The STW82103B is a versatile and reliable mixer device that is suitable for use in a number of RF mixing applications. It is able to combine signals of two different frequencies and is highly accurate in its output, providing low distortion and good harmonics rejection performance. Its small physical form factor and low power consumption make it particularly suitable for portable and miniaturized applications.