Application Notes

The documents provided on this page are intended solely for the use of VDI's customers.

VDI Application Note:  VDI Waveguide Feedhorn Specifications (VDI-1001)
This document provides specifications for VDI's waveguide feedhorns.

VDI Application Note:  VDI Waveguide Band Designations (VDI-1002)
This document details the waveguide bands employed by VDI components. In all cases VDI's waveguide flanges are compatible with standard EIA flanges and any reflections caused by small discontinuities in the waveguide dimensions are found to be negligible. VDI's products extend to frequencies well above the standard waveguide bands and therefore we have adopted our own revised extension of the EIA standard for the higher frequencies (ie. WR-1.2 covers 600-900 GHz). Also, frequency multipliers and harmonic mixers require waveguides optimized for bands spaced at integer multiples. For example, a full-band WR-10 frequency doubler with an output band of 75-110 GHz has an input band of 37-55 GHz. The closest EIA standard band at the input is WR-22 covering 33-50 GHz and thus VDI has adopted a WR-21.0 waveguide with dimensions 210 x 105 mils. VDI's WR-21.0 flange mates directly to the EIA standard WR-22 flange. See "Recommendations for Waveguide Interfaces to 1 THz" for more details and notes on waveguide bands and flanges.

VDI Application Note:  VDI Notes on Diode Mount and Solder (VDI-1003)
The following notes are some general guidelines and details that may be helpful when flip-chip mounting/soldering VDI diodes to circuits. The procedure noted here is essentially the procedure used by VDI. The VDI diode solder contact pads are Au thin films. Process times and temperatures are variable and depend upon the Customer’s circuits or substrates being used. This outline is simply intended to give some general guidelines for diode flip-chip mounting and soldering.

VDI Notes on Diode Specifications (VDI-1004)
The following notes describe how to interpret VDI diode specifications.

VDI Application Note:  VDI Taper Use with PM - Power Measurement above WR10 Band (VDI-704)
This document provides details for using VDI waveguide tapers with VDI Erickson Power Meters above WR10 band.

VDI Application Note: Low Power Measurements (VDI-1005)

VDI Application Note: Atmospheric Attenuation at THz (VDI-1006)

VDI Application Note: MixAMC Block Conversion vs. Spectrum Analyzer Extension (VDI-1007)

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