New Japan Radio (NJR) has developed a high gain dual stage LNA " NJG1187 " for GNSS, and entered mass production.
NJG1187 is an industry-leading high gain and low NF (Noise Figure) Low Noise Amplifier (LNA) designed for GNSS applications.
In recent years, Multi-GNSS support that receives signals from 1.1 to 1.2 GHz band (1164-1300 MHz) and in addition to the conventional 1.5 GHz band (1559 to 1610 MHz) is required for high-precision positioning in self-driving cars and so on.
The NJG1187KG1 is available to tune for the corresponding frequency by changing only value of external parts and realize high gain, low NF in each band of 1.1 to 1.5GHz.
This LNA is also available to place a filter between the two LNA stages in order to realize high attenuation without degradation of NF for receiver sensitivity.
It can be used for various applications such as car antennas and GNSS modules.
※1 NJR researched by November 2020
■ Realize high gain and low NF in each band of GNSS system
The NJG1187KG1 is available to tune for the corresponding frequency by changing only value of external parts and realize high gain of over 30dB, low NF of about 0.6dB in each band of 1.1 to 1.5GHz.
It supports Multi-GNSS required for high-precision positioning and contributes to improving the receiver sensitivity of GNSS receiver and shortening the positioning time.
■ Improve circuit design flexibility
Since the first and second stage LNA of the NJG1187KG1 are matched outside the package, it is available to place a filter between the two LNA stages (Figure 2). Compared with a front filter in the first stage of the NJG1187, it can restrain degradation of NF.
You can flexibly change the circuit configuration according to the required characteristics.
|Supply Voltage||3.3 V typ. (1.5 to 3.7 V)|
|Current Consumption||8 mA typ. @ 3.3 V|
|Gain||34 dB typ. @ L1 band
37 dB typ. @ L2/5 band
36 dB typ. @ L6 band
|Noise Figure||0.60 dB typ. @ L1 band
0.65 dB typ. @ L2/5/6 band
|Output power at 1dB compression point
|+13 dBm typ. @ L1 band
+12 dBm typ. @ L2/5/6 band
|Input Return Loss||11 dB typ. @ L1 band
15 dB typ. @ L2/5 band
14 dB typ. @ L6 band
|Output Return Loss||13 dB typ. @ L1 band
15 dB typ. @ L2/5/6 band
1.6 mm x 1.6 mm x 0.397 mm typ.
- GNSS (including GPS, GLONASS, BeiDou, Galileo) Receiver
- Car antenna, Dashcam, Car navigation system
- GNSS module