| 摘要 |
A switching device for adjusting the impedance of a self-inductance (3) forming part for example of the radiator of a VHF/UHF antenna for aircraft switchable by short-circuiting a part of the self-inductance. A PIN diode (12) is raised to a blocking or a transmitting voltage in response to control signals which are transmitted thereto by an optical link (8). Preferably the optical signals are transmitted to a hybrid opto-electronic circuit, which renders the PIN diode operative in conjunction with insulated conductors (11, 13) plated on the self-inductance and raised to the desired voltage.
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