HIGH FREQUENCY APPARATUS

摘要

In a method of fabricating a tuning door for a resonant cavity, firstly contact fingers (10) are formed around the edge of a conductive plate (9) an d the plate (9) is then fixed to a support (12) by, for example, double sided adhesive tape (11). The conductive plate (9) is part of the interior surface of the resonant cavity. The fingers may be formed in one operation, for example, by photo etching and are fully integral with the active surface to give optimum electrical conduction between them. Other types of high frequen cy apparatus where contact fingers are used to provide electrical conduction between a moveable wall and an adjacent conductive surface may also make use of the invention.