QuinStar Technology's QNS series of millimeter-wave noise sources cover
the frequency range of 18 to 110 GHz in seven waveguide bands with up to full standard
waveguide band coverage. They feature stable noise power output, high switching speed and
relatively flat high output power. Careful device selection, special cavity design and
matching circuits have all contributed to a reliable design that is highly stable with
time and over temperature.
The noise output
power of these noise sources is specified in terms of excess noise power ratio (ENR) as a
function of frequency. QuinStar Technology offers three versions of these noise sources to
suit virtually any application. Full waveguide band noise sources are offered for use with
Noise Figure Meters. These models provide very flat ENR (nominally 15 dB) over complete
standard waveguide bands in the 18 to 110 GHz region. |
Higher power noise sources offer amplified output power (ranging from 20 to
25 dB ENR) over the 18 to 110 GHz frequency range. Narrowband versions with high output
power are offered for subsystem applications and special test equipment. These nominally
offer 1 to 2 GHz bandwidth with excellent flatness and stable characteristics. An integral
isolator is offered as an option for improved VSWR. QuinStar can readily provide a
custom-designed noise source to suit unique applications or subsystem requirements.
Series QNS noise
sources are ideally suited for measuring noise figure of amplifiers and receivers using
the most currently available noise figure meters and eliminate the need for gas tubes.
They are also well suited for calibration and built-in test functions in many sensitive
receiver subsystems, radiometers and measurement instruments. |
