A radio-frequency power amplifier for preventing a final-stage HBT from being destroyed is provided. The device includes a horizontal barrel engagement member that has a straight portion and, typically, two angle portions. In response to the query, the system performs a lookup in an enhanced Bloom filter to determine whether the pattern of data elements was observed in the stream of data, wherein the enhanced Bloom filter includes multiple instances of a Bloom filter, and wherein each instance of the Bloom filter is associated with a different time interval. A first outer layer is connected to the first side and a second outer layer is connected to the second side.