Abstract
The research aims to design a narrow-band frequency drive amplifier (1.5GHz -1.6GHz), which is used to boost the transmitter amplifier's input signal or amplify the GPS, GlONASS signals at the L1 band.
 The Power Amplifier printed circuit board (PCB) prototype was designed using InGaP HBT homogeneous technology transistor and GaAs Heterojunction Bipolar Transistor (HBT) transistor. Two models have been compared; one of the models gave 16dB gain, and the other gave 23dB when using an input power signal (-15dBm). The PCB consumes 2.4W of power and has a physical dimension of 11 x 4 cm.
Highlights
Any amplifier with a low Noise Factor (NF) can be used as a Low Noise Amplifier (LNA), which is the first block in high-performance receivers
The test platform was configured before the measurements, and the cable loss resulting from attenuation was calculated for both the input signal and the output signal cables as the following:
The amplifier based on the second model at the 1.575GHz frequency band provided a gain of 25.2dB and a signal-to-noise ratio of 17.4dB
Summary
Any amplifier with a low Noise Factor (NF) can be used as a Low Noise Amplifier (LNA), which is the first block in high-performance receivers. It determines the noise limits and receiver sensitivity in addition to signal-to-noise ratio (SNR), so LNA is the most important component in receivers since it determines the quality of the performance of these receivers (Manjula, et al, 2018) (Kazan, 2018). Using Friis' Formula for noise and considering that the LNA is typically the first block of the receiver, it is clear that the LNA's noise figure (NF)s a key component for the entire front-end radio receiver circuit (LIU, 2011).
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