Abstract: A vehicle radar system (2) for detecting the surroundings, includes a circuit board (4), with a substrate layer (14) having an upper face (14a) and a lower face (14b), a strip conductor (22) applied onto the upper face (14a) so as to surround a shielding region (20), a shielding housing (6) that covers the shielding region (20) and that extends along and is connected to the strip conductor (22) in an electrically conductive manner, and at least one wave guide (28) arranged in the substrate layer. The wave guide (28) has a laterally delimiting wave guide wall (28c) as well as upper and lower wave guide surfaces (28a, 28b), wherein the upper wave guide surface (28a) is a section of the strip conductor (22).

Abstract: The disclosure relates to a radar system for registering the environment for a motor vehicle, with a circuit board includes a wave termination with a termination line, a signal line connected to it for the transmission of a high frequency signal, and a first substrate layer which is produced from a material with a first loss factor. The radar system also includes a first tier attached onto the first substrate layer, which includes the signal line, a second substrate layer which is produced from a second material with a second loss factor, which is greater than the first loss factor, and a second tier applied to the second substrate layer, which includes the termination line. Additionally, the disclosure relates to a circuit board for such a radar system.

Abstract: The invention relates to a vehicle radar system (2) for detecting the surroundings, which radar system has a circuit board (4), with a substrate layer (14) comprising an upper face (14a) and a lower face (14b), with a strip conductor (22) which is applied onto said upper face (14a) and surrounds a shielding region (14b), along which a shielding housing (6) that covers said shielding region (20) is connected to this strip conductor (22) in an electrically conductive manner, and with at least one wave guide (28) arranged in said substrate layer (14), which wave guide (28) has a laterally delimiting wave guide wall (28c) as well as an upper and a lower wave guide surface (28a, 28b), wherein said upper wave guide surface (28a) is a section of said strip conductor (22).

Abstract: A method for producing a transmission signal, wherein an input signal (Vd(t)), which is to be amplified, is fed to a power amplifier (PA) which outputs the signal in an amplified form (va(t)). A reproduction thereof is made and allocates a specific pre-distortion input signal (vd(t)) value to a specific input signal (vd(t)) value. A corresponding pre-distortion value is then determined for the input signal (vd(t)) and the corresponding pre-distortion value is applied to the input signal (vd(t)) in order to feed the pre-distorted input signal to the power amplifier (PA). Subsequently, the crest factor (CF) is calculated from the output signal (vd(t)) of the power (PA) and the reproduction or the value thereof if the determined crest factor departs from a predetermined range of values.

Abstract: A method for improving the output power of a non-linear amplifier, wherein signal amplitudes of a digital baseband are predistorted and then fed at the input of the power amplifier, having a non-linear characteristic curve, in order to linearize the characteristic curve. The signal amplitudes are fed to the input of the power amplifier in a predistorted manner up to a predetermined transition power while being fed to the input of the power amplifier in a non-predistorted manner from the predetermined transition power on.

Abstract: A method for improving the output power of a non-linear amplifier, wherein signal amplitudes of a digital baseband are predistorted and then fed at the input of the power amplifier, having a non-linear characteristic curve, in order to linearize the characteristic curve. The signal amplitudes are fed to the input of the power amplifier in a predistorted manner up to a predetermined transition power while being fed to the input of the power amplifier in a non-predistorted manner from the predetermined transition power on.

Abstract: A method for producing a transmission signal, wherein an input signal (Vd(t)), which is to be amplified, is fed to a power amplifier (PA) which outputs the signal in an amplified form (va(t)). A reproduction thereof is made and allocates a specific pre-distortion input signal (vd(t)) value to a specific input signal (vd(t)) value. A corresponding pre-distortion value is then determined for the input signal (vd(t)) and the corresponding pre-distortion value is applied to the input signal (vd(t)) in order to feed the pre-distorted input signal to the power amplifier (PA). Subsequently, the crest factor (CF) is calculated from the output signal (vd(t)) of the power (PA) and the reproduction or the value thereof if the determined crest factor departs from a predetermined range of values.