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This paper proposes a power-efficient low noise amplifier (LNA) for wireless sensor networks (WSN) applications. The energy consumption of LNAs plays a significant role in the design of WSN applications seeking less energy consumption. The transistor (BP1V01M0) is used in this article to get a low noise figure (NF) of 1.2dB and high power gain of 1...
Contexts in source publication
Context 1
... AWR, the NFCIR graph is plotted in a polar form at the targeted frequency of 2.4 GHz to figure out the value of the input impedance to be matched. Figure 8 shows the NFCIR plot, which evaluates the input impedance of (0.965+i1.1176). Hence, this impedance has to be normalized by 50Ω and then conjugated. ...
Context 2
... AWR, the NFCIR graph is plotted in a polar form at the targeted frequency of 2.4 GHz to figure out the value of the input impedance to be matched. Figure 8 shows the NFCIR plot, which evaluates the input impedance of (0.965+i1.1176). Hence, this impedance has to be normalized by 50Ω and then conjugated. ...
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Citations
... Unfortunately, it suffers from low sensitivity compared to narrowband magnetic probes [17,18]. Connecting a low noise amplifier (LNA) at the output of the passive magnetic probe to enhance the sensitivity is one of the solutions to overcome the broadband probe issue [19]. A novel rectangular broadband (up to 7 GHz) magnetic probe was presented in Ref. [20]. ...
This paper presents a printed magnetic probe that can switch from broadband to tunable narrowband for near-field measurement. In the early design stage, we created a printed loop gap resonator as a magnetic reference sensor for the pre-compliance test in a band up to 6 GHz. Consequently, the results showed a good response in terms of the S11 and S21 parameters of the proposed probe compared with the commercial magnetic sensor XF-R 3-1. The source noise might spread among different frequency bands, making the broadband magnetic probe the closest choice for estimating the magnetic field in the near-field region. Unfortunately, broadband magnetic probes have lower sensitivity than narrowband ones. One of the solutions to get high sensitivity is to connect the LNA to the output of the passive magnetic sensor. This work proposes a novel method to solve this issue using a PIN diode to change the broadband status into a high sensitivity narrowband status and then tune this narrowband across the most critical applications such as 3.5° GHz, 3.75° GHz, 4.8° GHz, and 5.2° GHz with the help of a varactor diode. Compared to the broadband status, an improvement of more than 10 dB has been obtained across all these wireless bands. Furthermore, the proposed structure’s isolation between the electrical and magnetic fields is about 13 dB.
