Flann’s engineers have just completed final testing of the first 330 GHz cavity frequency phenadip.com meter.
This Power-over-Ethernet controlled device is able to repeatably tune a ‘notch’ frequency response to any frequency within the waveguide band of 217 – 330 GHz, and this allows the frequency accuracy of measurement systems to be confirmed.
Frequency measurement is usually achieved using digital counters, and high frequency counters are available with multiplier front-ends to work at millimeter and sub-millimeter frequencies. However they depend on knowing the exact frequency multiple, and if the system is actually measuring a different multiple the results could be completely wrong! Using a frequency meter gives confirmation that the correct frequency is being measured and is an important part of a metrology system using counters at high frequencies.
Electronic control is essential – with a resolution of 0.2 GHz the piston in the frequency meter cavity must be positioned to within a few microns, so a precision servo is the only option. The Ethernet remote control means that the frequency meter can form part of a sophisticated automatic test system without the need for a specialist control interface (eg IEEE-488/GPIB or RS-485). More Info