DEM1420ULNA Datasheet | DEMI

.. DEM 1420ULNA - 1420 MHz. Ultra Low Noise Amplifier Specifications: Gain: Noise Figure: P1d B: Input VSWR: Output VSWR: Voltage: 17d B nominal <.4d B +5d Bm output >6d B @ design frequency >10d B DC - 3 GHz. +7 - +16 VDC Product Description: The DEM1420ULNA is one of a series of Ultra Low Noise Amplifiers that shares a mon design produced by Down East Microwave Inc. from 900 MHz. through 1700 MHz. Each model is optimized for it’s own specified frequency. The ULNAs utilizes the latest in PHEMT technology and is designed for receive systems such as EME stations and weak signal satellite reception requiring the lowest noise figure as possible. All of the ULNAs are receive only and do not provide any RF bypass switching circuitry. Standard gains of our ULNAs range from15 - 18 d B. All noise figures for this series of ULNAs are below 0.4d B. The ULNAs are adjusted on an individual basis for the best performance possible. This is acplished with an internal negative voltage power supply that is separate from the RF circuit and provides . power supply isolation for the FET. 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 impedance. 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. Tuned circuits may also require returning if a cable length or the tuning of a filter that is connected to the output of a tuned circuit LNA is changed. This ULNA design is provided with type “N” connectors that are...