Abstract: In a method and apparatus for compensating for gain changes in an amplifier circuit comprising radio-frequency modules and attenuation elements, a radio-frequency module is driven with a first temperature-dependent monitoring voltage UHF(T), and an attenuation element with a second temperature-dependent monitoring voltage UVG(T). The first temperature-dependent monitoring voltage UHF(T) is produced by applying a temperature dependency to an individual monitoring voltage Uopt, which is predetermined for a predetermined temperature for a radio-frequency module, in order to set the optimum operating point of the radio-frequency module. The second temperature-dependent monitoring voltage UVG(T) is produced by applying a temperature dependency to a predetermined monitoring voltage UVG—T for the attenuation element. The monitoring voltage UVG—T is determined in an iteration method, such that the output power of the amplifier circuit reaches a predeterminable level at a constant input power.

Abstract: A system for making electrical contact between a transmit/receive module and a testing device for the transmission of high-frequency signals includes a mechanically guided, frame-shaped contacting unit having a plurality of contact elements for contacting the TR module. The contacting unit surrounds the T/R module and is positioned relative to the T/R module such that the contact with the T/R module is established in one operation via the contact elements. A line substrate, which is arranged on the contacting unit and electrically connected with it, is constructed as a shielded triplate line by which the high-frequency signals can be conducted to the testing device.

Abstract: In a method and apparatus for compensating for gain changes in an amplifier circuit comprising radio-frequency modules and attenuation elements, a radio-frequency module is driven with a first temperature-dependent monitoring voltage UHF(T), and an attenuation element with a second temperature-dependent monitoring voltage UVG(T). The first temperature-dependent monitoring voltage UHF(T) is produced by applying a temperature dependency to an individual monitoring voltage Uopt, which is predetermined for a predetermined temperature for a radio-frequency module, in order to set the optimum operating point of the radio-frequency module. The second temperature-dependent monitoring voltage UVG(T) is produced by applying a temperature dependency to a predetermined monitoring voltage UVG—T for the attenuation element. The monitoring voltage UVG—T is determined in an iteration method, such that the output power of the amplifier circuit reaches a predeterminable level at a constant input power.

Abstract: A system for making electrical contact between a transmit/receive module and a testing device for the transmission of high-frequency signals includes a mechanically guided, frame-shaped contacting unit having a plurality of contact elements for contacting the TR module. The contacting unit surrounds the T/R module and is positioned relative to the T/R module such that the contact with the T/R module is established in one operation via the contact elements. A line substrate, which is arranged on the contacting unit and electrically connected with it, is constructed as a shielded triplate line by which the high-frequency signals can be conducted to the testing device.