Amplifier. DEM1420ULNA Datasheet
(DEMxxxULNA) Ultra Low Noise Amplifier
DEM33ULNA - 900-930 MHz. Low Noise Amplifier >17dB Gain
DEM23ULNA - 1240 -1300 MHz Low Noise Amplifier >17dB Gain
DEM1420ULNA - 1400 -1500 MHz Low Noise Amplifier >16dB Gain
DEM1500ULNA - 1500 -1650 MHz. Low Noise Amplifier >16dB Gain
DEM1691ULNA - 1650 -1800 MHz. Low Noise Amplifier >15dB Gain
>6dB @ design frequency
>10dB DC - 3 GHz.
+7 - +16 VDC
The DEM ULNA is a series of Ultra Low Noise Amplifiers intended to be used for Radio
Astronomy applications, amateur EME communications or weak signal satellite reception This series of
ULNA’s produced by Down East Microwave Inc. share a common design from 900 through 1800 DataShee
the latest in
figure possible. All of the ULNAs are receive only and do not provide any RF bypass switching circuitry.
Standard gains of our ULNAs range from15 - 17 dB depending on frequency. All noise figures for this
series of ULNAs are below 0.4dB. The ULNAs are adjusted on an individual basis for the best
Our ULNA design incorporates a
low loss series inductor input circuit and
a resistive loaded output circuit. During
testing, the input circuit is optimized for
gain and noise figure. The resistive
loaded output circuit, is adjusted to
control the gain and is tested for a
constant wide bandwidth output
This resistive load
impedance absorbs products caused by
reflections from band pass filters or high
Q receiver front ends. We do not use
tuned output circuits or baluns in our
ULNA designs. Tuned output circuits
and baluns do not offer constant output
impedances over wide bandwidths and may cause out of band instabilities from reflected signals.
DataSheeTt4uUn.ceodmcircuits may also require readjusting if a cable length or the characteristics of a filter changes.
DataSheet4 U .com
The ULNA’s can be provided with type “N” or SMA connectors that are mounted on a
weather proof die cast aluminum enclosure that measures 3.75” L x 2.5” W x 1.375” H. This designis
also available in a standard die cast enclosure if desired. Both of these enclosures enhances RF
insusceptibility and protects against stray external EMI. DC power is applied through a Pi-circuit feed
through filter connector which is a simple external solder connection that attenuates frequencies
through 18 GHz. It may also may be applied through the coax. Specify preference at the time of
order. Higher gain versions may be available for some design frequencies. Please consult DEMI with
your requirements. The 23ULNA design is also offered in kit form.
ULNAs with operating frequencies, configurations, gains and noise figures not found on our
price list or product descriptions can be designed by Down East Microwave Inc. and produced with
relatively short delivery times. Please contact us with your specifications and/or requirements.
Schematic Diagram of 33, 23, 1420 ,1500, and 1691ULNA Design:
|Features||Datasheet pdf www.DataSheet4U.com DEM33ULNA DEM23ULNA DEM1420ULNA DEM1500ULNA DEM1691ULNA - 900-930 MHz. Low Noise Amplifier >17dB Gain 1240 -1300 MHz Low Noise Amplifie r >17dB Gain 1400 -1500 MHz Low Noise A mplifier >16dB Gain 1500 -1650 MHz. Low Noise Amplifier >16dB Gain 1650 -1800 MHz. Low Noise Amplifier >15dB Gain No ise Figure: IP3 output Input VSWR: Outp ut VSWR: Voltage: Specifications: <0.4 dB +15dBm >6dB @ design frequency >10dB DC - 3 GHz. +7 - +16 VDC Product Desc ription: The DEM ULNA is a series of Ul tra Low Noise Amplifiers intended to be used for Radio Astronomy applications, amateur EME communications or weak sig nal satellite reception This series of ULNA’s produced by Down East Microwav e Inc. share a common design from 900 t hrough 1800 DataShee MHz. Each model li sted above is optimized depending on th e frequency requirement. The ULNAs Data Sheet4U.com utilize the latest in PHEMT technology and are designed for applic ations requiring the lowest noise figure possible. All of the ULN.|
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