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Ultra Broadband Amplifiers

Although single ended amplifiers can be designed with a fractional bandwidth approaching 50%, for application with larger bandwidth, a technique widely known as traveling wave or distributed amplifiers are preferable. In such amplifiers ultra wide band operation can be achieved by synthesizing an artificial transmission line. Most TEM transmission lines exhibit a low-pass frequency response and therefore, the bandwidth starts from DC and the upper range is the cut off frequency of higher order modes.

By analogy, a distributed amplifier will show the same characteristics. The input and output capacitance of an active device such as FET is combined with inductors to form a lumped element artificial transmission line. The frequency bandwidth of such a circuit can be extended to several tens of GHz.

Typical application for such an amplifier is a laser driver amplifier for wide band optical communication. These amplifiers find numerous applications in electronic warfare and counter measures.

Telecom Technologies has an extensive experience in the development of ultra wide band amplifiers and can help you with a reference design to meet your requirement.