The low noise amplifier (LNA) circuit is exceptionally imperative as it promotes and initializes general execution performance and quality of the mobile communication system. LNA's design in radio frequency (R.F.) circuit requires the trade-off numerous imperative features' including gain, noise figure (N.F.), bandwidth, stability, sensitivity, power consumption, and complexity. Improvements to the LNA's overall performance should be made to fulfil the worldwide interoperability for microwave access (WiMAX) specifications' prerequisites. The development of front-end receiver, particularly the LNA, is genuinely pivotal for long-distance communications up to 50 km for a particular system with particular requirements. The LNA architecture has recently been designed to concentrate on a single transistor, cascode, or cascade constrained in gain, bandwidth, and noise figure.
The Current state of Radio Frequency Identification (RFID) has been expending in the terms of information handling and material flow. It is one of many technologies grouped under Automatic Identification such as barcodes, magnetic inks, optical character recognition, voice recognition, touch memory, smart cards, and biometrics. RFID is an important feature because of the ability to detect objects under unique identification. Therefore, a possible approach with the "Drive-Thru" Attendance System project for University Education Sultan Idris (UPSI) staff by using Radio Frequency Identification (RFID) outlines the likelihood that can be used to improve staff attendance efficiency. The purpose of this project is to improve the system of old attendance and to eliminate the remaining time during the attendance collection. The RFID reader is located at an angle called "Drive Thru Zone" on both Campuses where staff will pass the route for the purpose of scanning the identity card tag (ID) for attendance. Then, the information is processed by MTLAB and PICKIT2 before displaying the data received on the LCD and the output shown on the PC / Laptop. The result shows that if the identity card is not registered, it can not access the staff attendance. About 70% of respondents agreed with the project based on the questionnaire distribution. In conclusion, "Drive Thru" shows staff arriving on time and able to eliminate the rest of the time.
Every now and then communication technology continuing to evolved to fulfil the market especially in mobile traffics of wireless technology demanding for high-rise data rates affecting radio frequency bandwidths to affirming specific performance. Utilizing unlicensed bandwidths of 5.8 GHz, the cascode low noise amplifier (LNA) enable to associate with long term evolution (LTE) standard without detracting degradation of service aspects. Considering LNA that positioned as a front-end in receiver block system in managing transmit the signal it benefit the LTE RF requirement become novelty in this design that plays crucial role. This paper focuses on designing and analysis of cascode low noise amplifier (LNA) adopted negative feedback and T-matching network at the input and output ports to emphasize trade-offs between parameters of gain, noise figure, sensitivity and stability. Pseudomorphic High Electron Mobility Transistor (PHEMT) FHX76LP manufactured by Eudyna Devices Inc is selected and the design is stimulated by using Advance Design System tool (ADS). From the analysis resulting LNA shows a maximum gain (S21) of 20.199 dB and return loss (S12) of −23. 585 dB with minimum noise figure of 0.360 dB with 2V supply. Meanwhile, the input reflection (S11) and output return loss (S22) are −11. 101 dB and −13. 714 dB respectively.
The paper aims to develop a new cascode low noise amplifier (LNA) by using double feedback technique architecture for wireless communication especially for long term evolution (LTE). The objective of this article is to display the improved performance of gain by minimizing noise figures with innovative techniques for the realization of Long Term Evolution (LTE). The innovation technique with implementation double feedback technique architecture outlines the possibility to improve the performance in various parameters such as bandwidth, stability, gain, noise figure, power consumption and complexity. The realization using cascode LNA is verified by using FHX76LP Super Low Noise HEMT that operate at 5.8 GHz in compliant with LTE standard. The Advance Design System (ADS) software is used to obtain characteristics for collecting data in a smith chart and s-parameter generated by simulation. The cascode LNA with the double feedback technique achieves an average gain of 20.887 dB with a noise figure of 0.341 dB. The input return loss and output return loss are – 14.354 dB and – 11.879 dB respectively. The outcome of this work will contribute to providing a better wireless signal receiver especially for the LTE standard and it potentially addressing wireless communication issues in rural areas.
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