Importance

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Abstract

A balancing loop including a housing inside of which is disposed a first conductor part having a first sublength and a second sublength, with the first sublength constructed as a coaxial line passing through the housing and having its inner conductor terminated inside the housing and connected to a second conductor part, and the second sublength extending from the termination of the inner conductor to the second conductor part to an output line. The second conductor part also has the first and second sublengths and extends spaced apart from and parallel to the first conductor part. The second conductor part has one side connected to the housing and the other side to another output line. The output lines connected to the first and second conductor parts thereby form two symmetrical output lines which lead out of the housing. At least one variable capacitor is arranged between the first and second conductor parts to tune the balancing loop over the operating frequency range. The characteristic line impedance of the first and second conductor parts and the first sublength are chosen such that the balancing loop can be tuned to a different frequency only by means of the variable capacitor, and without the need for changing the electrical length of the first sublength.

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First Claim