... Quasioptical Microwave ........ Bridge

Quasioptical Microwave Bridge

Broad bandwidth: 180 ... 380 GHz.

Total transmission losses are smaller than 0.5 dB by using corrugated waveguides.

Transmission mode preservation.

High sensitivity InSb mixer detector.

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Computer Aided Design

Section of a quasioptical microwave bridge as designed on our GBM CAD system.

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Gunn Diode Oscillator

Low-noise phase-locked millimeterwave source.

4 mW power at 220 GHz.

Frequency range 217 to 222 GHz.

Corrugated feed horn.

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Gunn Source Lock

For frequency and phase stability the millimeterwave source is stabilized in two ways

... Phase lock.

... Frequency lock.

Frequency source stability improves by orders of magnitude with respect to a free running oscillator. Note the difference in the frequency scales. See spectra of chromium ions in ruby for the demonstration of phase control.

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Quasioptical Components

... Elliptical mirrors for efficient power transmission.

... Wire grids as polarizers.

More about the advantages of quasioptics by clicking here.

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Spectrometer Control Software

... graphics oriented language LabVIEW.

... lock-in amplifier parameter control.

... superconducting magnet power supply control.

... multiple trace data display.

... file conversion between common file types.

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