Balance filter is an important part of RF transceiver system. Widely used in various forms of wireless communication. Filter we should be clear, is to filter the unnecessary signal, let the target frequency low loss through, so that the stray signal effective attenuation and suppression. Filter is the most basic and important device in the communication system. Its performance index directly affects the sensitivity, transmission power, anti-interference and other performance index of the communication system. balun filters need special mention here. It is a balanced and unbalanced switching device. Besides filtering function, it also has impedance conversion function. Baron can realize the conversion between single-ended and differential.

Balanced Barron filter is mainly used in Wifi, Zigbee and other radio frequency products. Currently, there are two kinds of Bluetooth filters according to their structure: single-ended filter and balanced Bluetooth filter.

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