​​Low Noise Amplifiers

 
 
X Band Low Noise Amplifier with Waveguide in​terface

Our range of ITAR Free, Low Noise Amplifiers (LNAs) cover a variety of applications but are primarily suited to airborne, maritime and ground based radar system​s. LNAs are primarily intended to minimise added noise whilst providing high gain so design focusses on the parameters associated with the noise response of the amplifier.  They are usually the first amplifier in the Radar detection chain and will have the lowest noise figure.

Teledyne Lincoln Microwave’s Low Noise Amplifiers are available in a number of package types including Connectorized and Surface Mount.


Low Noise Amplifiers At a Glance

  • MMIC and discreet components using Si and GaAs technology
  • Maximum Input power handling typically between -5dBm and 10dBm
  • SSG (Small Signal Gain) range from typically 15dB to 40dB
  • Output 1dB compression point typically 5dBm minimum
  • Input VSWR 2.0:1max Output VSWR 1.5:1 max
  • SSG flatness typically 1dB with temperature compensation available.
  • Frequency range between 0.5GHz and 40GHz with nominally +/-20% BW. Expect an increased noise figure over wider bandwidths.
  • Operating Temperature -50'C to +85'C
  • All units have power supply regulation with reverse and over voltage protection.
  • Input voltages from +/-5V to +/-15V can be accommodated.(Priority switching fitted as standard)
  • ITAR Free

 Additional Information

Low Noise Amp​lifier

As the LNA is the first gain stage in the receiver chain its noise figure (NF) dominates the amount of noise present in the receiver and dictates the receiver sensitivity. 

There are other parameters that impact the performance of the LNA and hence the performance of the receiver in general. 

  • ​​Parameters such as the second and third order intercept points, input and output impedances, and stability are also very important and indirectly influence noise figure. 
  • A good input impedance match can be achieved through the design of input matching networks. However, these add a significant amount of resistive loss to the LNA and contribute directly to the noise figure. 

Integrated modules overcome this constraint by providing​ more flexibility when matching the output/input impedances at the Limiter to LNA interface. Teledyne Lincoln Mi​​crowave is able to demonstrate tangible improvement in noise figure from integrated RF front end assemblies as opposed to receivers based on discrete components.


 Common Specifications

Frequency
(GHz) 
Noise figure
(dB) 
Small Signal Gain
(dB)
0.5-1 <1 >30
9-10 <1.5 >25
16-17 <1.6 >23

If you haven’t found exactly what you are looking for click here to contact Teledyne Lincoln Microwave about a solution which meets your exact requirement.

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