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技术概述
The Keysight Technologies, Inc. 33330B/C Series of broadband coaxial detectors are specifically designed for use in microwave instrumentation and systems applications such as the detecting element in leveling loops, power monitoring, and as wideband video detectors.
These detectors utilize a Low Barrier Schottky (LBS) diode that requires no bias, has exceptional broadband flatness and low SWR, and is environmentally rugged. For measurement accessory applications, Keysight offers similar RF performance with a variety of input and output connectors in the Model 423B, 8470B, and 8472B Series.
The Low Barrier Schottky diode detector
The 33330B/C detectors consist of a Low Barrier Schottky (LBS) diode and a miniature thin film circuit that matches the diode to a 50-ohm transmission line. The diode is a specially fabricated Schottky diode using metalization designed to achieve low origin resistance, thus eliminating the need for bias. In addition to superior RF characteristics, the LBS detector offers significant advantages over other types of detectors. For example, a typical Schottky requires bias for proper operation; a tunnel diode detector has a limited power range because of its negative resistance region; and the point contact diode, because of its fragile construction, is unsuitable for many field applications.
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