High frequency module for e.g. liquid level radar device, has tap for decoupling reference signal from transmission line, and delay unit arranged after tap for delaying transmission signal on its path to antenna or sensor

摘要

The module (100) has a transmission line (115) for transmission of an electromagnetic transmitting signal to an antenna or a sensor. A tap (103) decouples a reference signal from the transmission line. A delay unit (104) is provided for delaying of the transmission signal on its path to the antenna or the sensor, and is arranged after the tap. The tap has a directional coupler, which is implemented as a hybrid coupler. The directional coupler consists of an adjustable coupling factor. The delay unit has a delay line implemented as a low temperature cofired ceramic (LTTC) component. Independent claims are also included for the following: (1) a liquid level measuring device for determination of the liquid level in a tank (2) an application of a high frequency module for liquid level measurement (3) a method for decoupling reference signals for a liquid level measuring device.