36,339
edits
WM782: Difference between revisions
no edit summary
No edit summary |
No edit summary |
||
| Line 18: | Line 18: | ||
When the requirement measurement is above 22 GHz, some type of external mixing is required. Current techniques utilize harmonics of the spectrum analyzer first sweeping LO and an external harmonic waveguide mixer covering the designer frequency range. The mixers extend the frequency range of measurement up to as high as 325 GHz. Each mixer covers a separate frequency range, typically about two thirds of an octave. | When the requirement measurement is above 22 GHz, some type of external mixing is required. Current techniques utilize harmonics of the spectrum analyzer first sweeping LO and an external harmonic waveguide mixer covering the designer frequency range. The mixers extend the frequency range of measurement up to as high as 325 GHz. Each mixer covers a separate frequency range, typically about two thirds of an octave. | ||
{| class="wikitable center" | {| class="wikitable center" | ||
| Line 54: | Line 52: | ||
Notes: | Notes: | ||
* All mixers are equipped with standard UG-XXX/U type flanges. MIL-F-3022 type flanges are available in F, D, and G bands. | * All mixers are equipped with standard UG-XXX/U type flanges. MIL-F-3022 type flanges are available in F, D, and G bands. | ||
* The waveguide name WR stands for waveguide rectangular, and the number is the inner long dimension width of the waveguide in hundredths of an inch (0.01 inch = 0.254 mm) rounded to the nearest hundredth of an inch. | * The waveguide name WR stands for waveguide rectangular, and the number is the inner long dimension width of the waveguide in hundredths of an inch (0.01 inch = 0.254 mm) rounded to the nearest hundredth of an inch. Waveguide height is half the waveguide width. | ||
* The Electronic Industries Alliance (EIA) is the body that defined the WR designations for standard rectangular waveguides. | * The Electronic Industries Alliance (EIA) is the body that defined the WR designations for standard rectangular waveguides. | ||
* [[media:MIL-DTL-39000C.pdf|MIL-F-39000/3C]], which describes flanges for double-ridge waveguides, was cancelled without replacement on January 20, 2009. | |||
==Links== | ==Links== | ||