Waveguide-based detectors

ACST supplies a range of waveguide-based detectors for direct detection of mm-wave/THz signals. These detectors are based on a Schottky diode with integrated passive matching circuitry.

MM-wave/THz signals are coupled by either a waveguide coupler from the waveguide cavity or an optical lense to a Schottky diode. It rectifies the mm-wave/THz signal and converts it into a DC signal.

Envelope detectors or Square-law detectors

These detectors are frequently called “envelope detectors” or “square-law detectors”. These detectors are among the simplest and most sensitive detectors of mm-waves and THz signals operating at room temperature.
An important feature of such a detector is, it is one of the fastest solid-state devices, operating at room temperature. Intrinsically, the response time of an envelope detector is down to few ps. The response time is basically limited by surrounding circuitry, low-noise amplifier (if any), and connectors/cables.

ACST detectors are based on Low-Barrier Schottky Diodes, or also called Zero-Bias Diodes (ZBD). These detectors are operated without voltage/current bias and, therefore, assume minimal excessive noise. ACST ZBD-based detectors are among the best low-noise detectors of mm-wave/THz signals worldwide, considering sensibility, noise performance, linearity, and compatibility with high-speed reading electronics. This makes ACST ZBD-based detectors suitable not only for power control in industrial/research systems but also in high data rate data transmission systems and radiometry applications

Product List

3DL 12C LS2500 A1/A1M

The 3DL 12C LS2500 A1 has a relatively slow (1MHz bandwidth) pre-amplifier. This version has the smallest NEP and is the most sensitive detector version.

3DL 12C LS2500 A2

The 3DL 12C LS2500 A2 version has an integrated 4GHz amplifier. In fact, the amplifier bandwidth extends up to about 5GHz but with some-how less gain.