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N a semiconductor diode that acts as a voltage-dependent capacitor, being operated with a reverse bias 变容二极管 → compare varistor
Through adding varactors, a new structure is introduced and it realizes controllable wave-beam of fixed frequency which is better for practical use.
文章提出一种新型结构，通过加入变容二极管，实现了在固定频点上波束可控，更适于实际应用。
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