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COTS PRE-FILTERED GPS LOW NOISE AMPLIFIER MODULES


GPS navigation and timing systems are a necessity in almost every market place spanning both commercial and military applications. Operating reliably in an increasingly crowded RF Spectrum is a continuously evolving challenge to system designers. Performance is dependent upon receiving a clean signal free from intentional and unintentional interferers. The 312 Series Filtered GPS LNA is a COTS solution to these types of problems. The product exhibits excellent anti-jam performance as well as a Sub 2 dB noise figure. The 312 Series is COTS part qualified to the most critical of environments for military and airborne applications and available in low order quantities with a short lead time.

Additional Resources:

COTS-based GPS Solution, flexible, configurable to meet system needs.

API Technologies' GPS LNA's are COTS-based

As an option, the unit can be powered through an external DC bias connector.

Designed to drop into a variety of systems

Pre-amps are powered by DC voltage applied to center conductor of output connector.

This module includes a wide selection
of pre-filtering configurations

312 Series GPS LNA Block Diagram

312 Series GPS LNA Block Diagram

filtered gps lna specifications


Parameter

Typical

Units

Frequency Range L1, L1/L2, L1/L5, L1/(L2-L5) N/A
Gain ± 3dB 16 19 22 25 28 31 34 37 40 dB
Input P1dB -7 -7 -7 -7 -8 -8 -9 -12 -15 dBm
Output IP3 4 7 10 12 15 17 19 20 20 dBm

Minimum

Typical

Maximum

Noise Figure 1.8 2.5 dB
Rejection -40 -45 dBc
L1 L2 L5 (L2-L5)
f≤1410 MHz f≤1050 MHz f≤1050MHz f≤1050 MHz
f≥1730 MHz f≥1410 MHz f≥1280 MHz f≥1410 MHz
Input Return Loss -9.5 -17.7 dB
Output Return Loss -9.5 -14 dB
Group Delay Variation ± 2.0 ns
Supply Voltage
Standard
Low-Voltage
 
4.8
3
 
36
5
VDC
Supply Current (Icc)
≤25 dB Gain Option
≥28 dB Gain Option
 
50
68
 
55
75
mA

filtered gps lna features


API Technologies’ 312 Series Filtered GPS LNA is designed to amplify GPS signals by filtering out inferences. This standard, off-the-shelf assembly has a short lead time and can be configured to meet most system needs. Leveraging API’s expertise in low-loss filter, amplifier and mechanical design, this compact module is offered in a wide range of performance options.

Overview

GPS navigation and timing systems are a necessity in almost every market place spanning both commercial and military applications. Performance and reliability in an increasingly crowded RF spectrum is a continuously evolving challenge to system designers. Manufacturing a custom solution to mitigate interference issues can be inherently expensive with the cost of NRE and qualification testing, in addition to long development cycles.

The 312 Series Pre-Filtered GPS LNA is the solution to these problems. It is a high performance COTS product that was designed for custom platforms without the high cost associated with a custom solution.

Applications
  • Missiles
  • Military Aircraft
  • Rockets
  • Satellite Navigation
  • Survey/Mapping
  • Marine Navigation
Commercial Off-the-Shelf

API has taken its experience in custom GPS solutions and developed the 312 Series product line to meet a need for a cost effective, off-the-shelf solution that doesn’t compromise system performance.

At the core of the product line is the amplifier assembly board which is common to each and every configuration. The assembly has the flexibility built in to allow for various gain levels, supply bias options, GPS band frequencies, and the number of outputs. The amplifier assembly is housed in one of three laser-welded, hermetic housings which provides for a variety of field-removable mating connectors. The customer simply builds the part number indicating which configuration works best for the specific application. The end result is a part that meets a custom need in a product that is considered off-the-shelf.

The 312 Series product line also includes a number of advanced or custom features that allows it to be a good choice for even more specialized requirements. Features like customized GPS filters and limiter protection are provisioned on the amplifier assembly and are considered semi-standard. This means that these features can easily be added without significantly impacting the cost or lead time.

Applications
  • Missiles
  • Military Aircraft
  • Rockets
  • Satellite Navigation
  • Survey/Mapping
  • Marine Navigation
Environmental

In many cases, the operational environment is the reason a user seeks a custom solution. Utilizing internal test labs, the 312 Series GPS LNA has been subjected to the most popular testing. When possible, the 312 has been included in testing of other product lines. This environmental testing is critical to provide confirmation that the 312 Series product will perform as well as a custom solution.

Download the datasheet to view the environmental testing or contact us to obtain the qualification test report.

Applications
  • Missiles
  • Military Aircraft
  • Rockets
  • Satellite Navigation
  • Survey/Mapping
  • Marine Navigation
Configurability

The 312 Series is a configurable product. The purpose for the flexibility is to allow the system designer to tailor the performance to exactly what the system requires. The part number is built to allow the designer to specify which GPS Band(s) that the module must operate in, the level of gain from 16 to 40 dB in 3 dB increments, either single or dual output, the bias option, and the mating RF and DC interfaces.

Applications
  • Missiles
  • Military Aircraft
  • Rockets
  • Satellite Navigation
  • Survey/Mapping
  • Marine Navigation
Customization

The 312 Series product line is very adaptable making it ideal for most applications, even those applications where a custom design seems like the only solution.

For example, the 312 Series has been adapted using custom filters with additional rejection performance. It has been modified to provide 3 outputs instead of the single or dual only. One application required an ultra-lightweight version, so API utilized magnesium and SSMA connectors to reduce the 312 Series weight by about 30%. All of these adaptations were done without significant redesign or NRE charges.

Applications
  • Missiles
  • Military Aircraft
  • Rockets
  • Satellite Navigation
  • Survey/Mapping
  • Marine Navigation
Mechanical Options
  • The 312 Series is packaged in a solid nickel plated 6061 aluminum housing.
  • Glass sealed pins are used for all RF & DC interfaces (except when configured with the D38999/20WA98PN circular connector).
  • The module is laser-sealed providing a hermetic package.
  • Customers may choose finish options including nickel plated or grey epoxy paint (per FED-STD-595) over nickel plate.
Applications
  • Missiles
  • Military Aircraft
  • Rockets
  • Satellite Navigation
  • Survey/Mapping
  • Marine Navigation
Qualification & Testing
  • The 312 Series has already been tested to many common environmental tests including Vibration, Acceleration, Explosive Atmosphere, EMC, Shock and more.
  • Please contact us for more information about qualification data.
Applications
  • Missiles
  • Military Aircraft
  • Rockets
  • Satellite Navigation
  • Survey/Mapping
  • Marine Navigation

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GPS LNA EXTRAS