Amplitude modulator, selector switch, having the same high frequency - transmitter - / receiving device and a radar apparatus as well as with the radar device and vehicle equipped with the radar device, which is equipped small ship

摘要

It is an amplitude modulator is made available, in the modulator properties can be coordinated. In an amplitude modulator is connected between two high frequency - transmission lines (1, 2) for transmitting high-frequency signals a pin - diode (3) is provided, which a high frequency modulation element, which is a from a (1) of the high frequency - transmission lines input rf signal is modulated and the radio signal to an output port (2a) of the other (2) of the high frequency transmission lines - outputs. A bias voltage supply circuit (c) comprises a trimmable chip - resistor (4), which a variable resistor is, for setting a by means of the pin - diode (3) flowing through the bias current. By adjusting a resistance value, the through the pin - diode (3) controlled bias current flowing through, so that it is possible for the modulator characteristics.