J. B. Gunn can refer to different subjects depending on the context. One well-known application of the name is related to **J. B. Gunn** (Joseph B. Gunn), who is significant in the field of physics for his contributions to nuclear physics and radiation detection. Additionally, "Gunn" could also refer to the **Gunn diode**, a type of semiconductor diode used in high-frequency electronics. It operates on the principle of negative resistance and is commonly used in microwave applications.
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