How much do you know about Wi-Fi filter technology?

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How much do you know about Wi-Fi filter technology? [Copy link]

The commonly used filter technology is bulk acoustic wave (BAW). It is best suited for frequencies of 1 GHz or higher; since Wi-Fi frequency ranges are 2.4 GHz , 5 GHz , and the upcoming 6 GHz , BAW technology is very suitable in these frequency ranges.

BAW has excellent insertion loss performance, which helps minimize RF path losses. Other advantages of BAW include its steep band edge and excellent heat dissipation characteristics.

BAW filters use a solid-mount resonator ( SMR ) structure, which is more efficient in heat dissipation than other filter technologies such as film bulk acoustic resonators ( FBARs ). SMR BAW uses an acoustic reflector consisting of a solid layer below the piezoelectric resonator; this solid layer is directly connected to the underlying silicon substrate, so that the heat generated in the filter is effectively away from the piezoelectric resonator through the reflective layer. Therefore, any increase in system heat has minimal impact on the SMR BAW filter and system performance, making it a good choice in filter technology.

The key to creating any end product in a timely manner and ensuring it passes final certification is to have all the necessary tools at hand; these filters provide just that. By using coexBoostt , bandBoost and edgeBoost filters in highly integrated RFFE solutions, we can help engineers reduce tedious and time-consuming design. For example, using a plug-and-play solution such as the QPF7219 2.4 GHz iFEM, all RFFE functions are available - eliminating the trouble of adding tuning and matching components and saving the time usually required when using discrete methods.

The above content is excerpted from " Increase your knowledge of Wi-Fi filter technology "