Rohde and Schwarz Gmbh & Co. Kg

Martin Hassler

Christian Evers

Thomas Will

Wolfgang Cohrs

Wolfgang Richter

Thomas Reichel

Werner Perndl

Michael Katzer

Toralf Bratfisch

Gerd Hechtfischer

Andrea Deutinger

A calibration device for a network analyzer with several ports provides a calibration circuit, which is connected in each case via a terminal port respectively to one of the several ports of the network analyzer. A first transistor and a second transistor are connected in series to each terminal port. In this context, both transistors are connected by their common connection to the terminal port. The first transistor and/or the second transistor is operated as an adjustable load.

Calibration device for a network analyzer

A power measurement cell comprises at least one thermoelement () and at least two heating elements (). A first heating element () can be heated by a measurement signal. A temperature can be measured by means of the thermoelement (). The two heating elements () have a very small spacing. The at least one thermoelement () and the two heating elements () have a high thermal coupling.

Thermoelectric power measurement cell and corresponding measurement method

An electronic microwave circuit () with field effect transistors which are integrated on at least one semiconductor chip (), has a light source (), which radiates the field effect transistors with light and possesses a housing () which encloses in a microwave excluding manner the semiconductor chip () and the light source () or a light conducting means () connected with the light source ().

Microwave switching with illuminated field effect transistors

Electronic switch () with two switching states (ON, OFF) possesses at least one field effect switching transistor (Q), input port (In) connected with source terminal (S), on which input signal (Vin) is present, output port (Out) connected with drain terminal, on which switched signal (Vout) is present, control port (Con) connected to gate terminal (G), on which is present signal (Vc) for controlling electronic switch () and switch apparatus (Sw), which creates the two switching states (ON, OFF) by means of a changing of control signal (Vc). Controlling signal (Vc), during at least one of the two switching states (ON, OFF) is, at least partially, formed by correction signal (Sc), which in turn is produced from input signal (Vin), so that the frequency dependent drop in voltage between the drain-source channel and the gate electrode of the field effect switching transistor (Q) is at least partially compensated.

Electronic switch

Growing community of inventors

Munich, Germany

Martin Hassler