U1019-QH Mimix Broadband, Inc., U1019-QH Datasheet - Page 5

• Manufacturer Part Number: U1019-QH
• Description: 37.0-40.0 Ghz Up-converter Qfn, 4x4mm
• Manufacturer: Mimix Broadband, Inc.

37.0-40.0 GHz Up-Converter
QFN, 4x4mm
March 2010 - Rev 25-Mar-10
App Note [1] Biasing - As shown in the Pin Designations table, the device is operated by biasing Vd1, Vd2, and Vd3 at 4.0V. The corresponding
drain currents are set to 120mA, 120mA, and 150mA respectively. Vg4 requires a fixed voltage bias of nominally -3V. It is recommended to use
active bias on Vg1, Vg2, Vg3 to keep the currents in Vd1, Vd2, and Vd3 constant, in order to maintain the best performance over temperature.
Depending on the supply voltages available and the power dissipation constraints, the bias circuits may include a single transistor or a low power
operational amplifier, with a low value resistor in series with the drain supply to sense the current. Make sure to sequence the applied voltage to
ensure negative gate bias is available before applying the positive drain supply.
App Note [2] IF1/IF2 versus IF1*/IF2* - The IF input to the typical configuration is through a 90deg hybrid coupler. The hybrid splits the IF input
into inphase and quadrature phase components. These two signals enter the XU1019-QH on either the IF1/IF2 pair, or the IF1*/IF2* complimentary
pair. Which ever pair are not used must be terminated into 50 ohms. There are subtle differences between the performance when using the main IF
ports (IF1,IF2) versus the complimentary ports (IF1*, IF2*) which are shown in the preceding performance curves. For highest gain, best image
rejection and lowest noise figure, the complimentary ports (IF1*, IF2*) should be used.
Export of this item may require appropriate export licensing from the U.S. Government. In purchasing these parts, U.S. Domestic customers accept
Characteristic Data and Specifications are subject to change without notice. ©2010 Mimix Broadband, Inc.
Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099
Tel: [phone] Fax: [phone] mimixbroadband.com
their obligation to be compliant with U.S. Export Laws.
U1019-QH
Page 5 of 10