Which advantage is not associated with the use of a Gunn diode?

The choice of low operational voltage as an advantage not associated with the use of a Gunn diode is correct because Gunn diodes typically operate at higher voltages compared to other semiconductor devices. The operational voltage of a Gunn diode generally ranges from several volts to tens of volts, making them less suitable in applications where very low voltage operation is essential. Therefore, while Gunn diodes offer several significant advantages, low operational voltage is not one of them.

On the other hand, negative resistance properties are a key feature of Gunn diodes, allowing them to efficiently generate microwave frequencies. The wide frequency range characteristic means they can be used in various applications across a spectrum of microwave frequencies. Additionally, simple circuit design is an advantage of Gunn diodes, as they can often be used without the need for complex additional circuitry, facilitating integration into various systems.