Receiver Front End Research Papers (original) (raw)

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Recent papers in Receiver Front End

This paper presents the design and analysis of a dual-band concurrent low noise amplifier (LNA) for 2.4 / 5.75 GHz wireless applications. This LNA combines a notch filter and T-matching network with inductive degenerated topology at the single stage common-source transistor. The LNA used two stage of GaAs HEMT by cascading the transistor to improve the gain and noise figure (NF). The LNA is matched concurrently at the two frequency bands by matching the input and output networks. The simulation results showed a high gain |S21| of 33 dB and 28.7 dB and low NF of 0.46 dB and 0.54 dB for center frequency of 2.4 GHz and 5.75 GHz. The supply voltage for LNA is 2V. Simulation of the design was performed with the Advanced Design System (ADS) software. The design is especially suitable for use in multi-standard wireless front end receiver.

- by Azman Ahmad and +1
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- Wireless Communications, Low noise amplifier, Receiver Front End

We present the design and implementation of a multi-constellation GNSS front-end. This front-end is able to operate in two different hardware configurations: using the L1/E1 band of GPS/Galileo and the L1 band of GLONASS, or the L2 band of GPS and GLONASS. Both of these operation modes can be implemented in the same printed circuit board by replacing only a few components. In the proposed design, the RF signals are down-converted to an intermediate frequency where the GPS and GLONASS bands are separated. Thanks to this separation, a considerable reduction of the necessary sampling rate for the digitalization stage is achieved. This simplifies and reduces the power consumption of this stage of the complete GNSS receiver. Measurements carried out to the implemented prototypes for the two different configurations are presented. The obtained results validate the proposed design.

- by Ramon Lopez La Valle
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- RF Design and Applications, GNSS receivers, Receiver Front End

This paper presents the design of a 100 MHz bandwidth with suitable for 4 channels narrow-band using Chebyshev filter at 5.75 GHz frequency. The design development includes calculation, simulation, measurement and testing. The simulation has been simulated using Ansoft Designer software to determine the bandwidth and the insertion loss, |S21|. The band-pass filter design used Duriod 5880 TLY-5A-0200-CH/CH microstrip substrate parameters and lumped components with Chebyshev passive filter topology. The design is useful for applications in multi-channel narrow-band of wireless communication systems for front-end receiver architecture design.

- by Azman Ahmad and +1
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- Wireless Communications, GSM, WiMAX, LTE, Receiver Front End

This paper presents the design and analysis of a dual-band low noise amplifier (LNA) at 2.4 GHz and 5.75 GHz for IEEE 802.11 a/b/g applications. This LNA proposed current-reused topology and presented new Hi-Pass and Lo-Pass matching technique network at the two stage common-source transistor. The LNA used GaAs HEMT transistor to improve the gain and noise figure (NF) matched concurrently at the two frequency bands. The simulation results showed a high gain |S21| of 36.093 dB and 23.152 dB and low NF of 0.735 dB and 0.530 dB for center frequency of 2.4 GHz and 5.75 GHz. The supply voltage for LNA is 2V. Simulation of the design was performed with the Advanced Design System (ADS) software.

- by Azman Ahmad
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- Wireless Communications, Receiver Front End, Low Noise Amplifier (LNA)

This research present a design of a higher gain (66.38dB) for PHEMT LNA using an inductive drain feedback technique for wireless application at 5.8GHz. The amplifier it is implemented using PHEMT FHX76LP transistor devices. The designed circuit is simulated with Ansoft Designer SV. The LNA was designed using T-network as a matching technique was used at the input and output terminal, inductive generation to the source and an inductive drain feedback. The low noise amplifier (LNA) using lumped-component provides a noise figure 0.64 dB and a gain (S21) of 68.94 dB. The output reflection (S22), input reflection (S11) and return loss (S12) are -17.37 dB, -15.77 dB and -88.39 dB respectively. The measurement shows the stability was at 4.54 and 3-dB bandwidth of 1.72 GHz. While, the low noise amplifier (LNA) using Murata manufactured component provides a noise figure 0.60 dB and a gain (S21) of 66.38 dB. The output reflection (S22), input reflection (S11) and return loss (S12) are -13.88 dB, -12.41 dB and -89.90 dB respectively. The measurement shows the stability was at 6.81 and 3-dB bandwidth of 1.70 GHz. The input sensitivity more than -80 dBm exceeded the standards required by IEEE 802.16.

- by Azman Ahmad
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- LNA Optimization, Receiver Front End

Receiver Front End Research Papers (original) (raw)

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