Abstract
The stability of the circuit and tolerance during the design and manufacture processes are theoretically studied in the design of 0.38THz sheet beam extended interaction oscillator (EIO). As a crucial factor affecting the ultimate performance of device, the inaccuracy during the fabrication process is studied. The manufacture tolerance is 5μm to assure the frequency shift within 1GHz. Besides, we have checked the feasibility of the optimization by evaluating the stability of the coupling cavity system. The feasibility is given by the normalized beam loaded conductance (g e ). The study has been verified by simulating the EIO's performances for various cavity parameters, including the length-tolerance of the circuit.
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