The NBS-40 is a primary noise standard for microwave calibration, covering 26.5 to 40.0 GHz with WR-28 waveguide. It provides an output noise temperature of 75.98 K with an accuracy of +0.25/-0.39 K, referenced at 628 mmHg and 293 K. The device uses a cryogenic liquid nitrogen bath and a precision waveguide horn with low insertion loss to achieve lower effective noise temperature and improved accuracy compared to conventional systems. It features an automatic nitrogen purge to eliminate the need for helium, and its design minimizes reflection losses by keeping critical components at room temperature. The system includes a dewar assembly, water bath, and accessories such as a wooden horn case, hoses, couplings, and cables.
The NBS-Series consists of calibration standards based on the primary fundamental physic constants of thermal noise and blackbody radiation. This provides the ultimate accuracy when measuring extremely low noise figures (noise temperatures). Simple, and versatile to use, the NBS-Series is an ideal solution for noise source calibrations, radiometer test references and low noise amplifier tests.
| Maury Microwave | |
|---|---|
| Product Category | Noise Standards |
| Product Number | NBS-40 |
| Product Name | Cryogenic Noise Standards |
