Design and Analysis of a Continuously Tunable Low Noise Amplifier for Software Defined Radio

Aneja, Aayush; Li, Xue Jun

doi:10.3390/s19061273

Cited by 10 publications

(3 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…CS-LNA with degenerated inductor is given in [4], in contrast to that the inductor in source branch is replaced by a gyrator -C active inductor, to provide the tunablity in the circuit. The device uses an active phase shifter in the amplifier's feedback loop to change the phase of signal amplified as indicated in [17,18]. Cascode structures [19,20] can also be used to incorporate the advantages such as reduced Miller effect, large bandwidth and also noise figure can also be reduced.…”

Section: Practical Considerations Of Lnamentioning

confidence: 99%

A gyrator-C active inductor based tunable low noise amplifier for sub-GHz frequency range

Prashar,

Kapur

2024

Eng. Res. Express

View full text Add to dashboard Cite

The propose exhibits a tunable low noise amplifier (LNA), which provides the tunability at sub-GHz frequency range and hence can become choicest frequency range for 5G applications. Common source (CS) with source degeneration inductor LNA is proposed; in which the inductor in source branch is replaced by gyrator-c active inductor which not only reduced the overall area of the circuit but can also be used to provide the feature of tunability by changing the bias voltage of CMOS based active resistor in feedback branch. Therefore, instead of having a LNA circuit for the fixed frequency, a single tunable LNA design can be used over a range of frequency from 1GHz to 5GHz. The proposed approach will provide the direct tuning to the circuit. The forward voltage gain achieved is greater than 10dB, input matching parameter is less than -10dB and the output matching parameter is less than -10dB. The average power dissipated is 0.02W. The results can be tuned by controlling the feedback voltage of tunable active inductor (Tunable_AI). The tunable results can be achieved up to the bandwidth of 1GHz.

show abstract

Section: Practical Considerations Of Lnamentioning

confidence: 99%

A gyrator-C active inductor based tunable low noise amplifier for sub-GHz frequency range

Prashar,

Kapur

2024

Eng. Res. Express

View full text Add to dashboard Cite

show abstract

“…Recently, there have also been efforts to design transformer-based LNA for software defined radio (SDR) applications [95], where the RF transformer serves as a tunable input matching stage in a four-stage LNA design (Figure 10). Tunability of the transformer matching circuit can be achieved by varying the current in the secondary coil ( L d in Figure 10) [96], which eventually changes the resonance frequency of the matching circuit.…”

Section: Applications Of On-chip Transformersmentioning

confidence: 99%

Integrated On-Chip Transformers: Recent Progress in the Design, Layout, Modeling and Fabrication

Bajwa

Yapıcı

2019

Sensors

View full text Add to dashboard Cite

On-chip transformers are considered to be the primary components in many RF wireless applications. This paper provides an in-depth review of on-chip transformers, starting with a presentation on the various equivalent circuit models to represent transformer behavior and characterize their performance. Next, a comparative study on the different design and layout strategies is provided, and the fabrication techniques for on-chip implementation of transformers are discussed. The critical performance parameters to characterize on-chip transformers, such as the Q-factor, coupling factor (k), resonance frequency (fSR), and others, are discussed with reference to trade-offs in silicon chip real-estate. The performance parameters and area requirements for different types of on-chip transformers are summarized in tabular form and compared. Several techniques for performance enhancement of on-chip transformers, including the different types of micromachining and integration approaches stemming from MEMS (microelectromechanical systems) technologies are also analyzed. Lastly, the different uses and applications of on-chip transformers are discussed to highlight the evolution of on-chip transformer technology over the recent years and provide directions for future work in this field.

show abstract

“…However, multimode operation degraded the linearity in all bands. Variation of input impedance through the transformer to achieve continuous tuning has also been proposed in [6,7]. Additionally, varactor diodes were explored to achieve continuous frequency tuning in LNAs.…”

mentioning

confidence: 99%

Design of a multimode tunable low noise amplifier for software defined radios

Aneja

2020

Electron. lett.

View full text Add to dashboard Cite

This Letter presents the design and analysis of a tunable low noise amplifier (LNA) capable of achieving single band, dual band and wideband operations. The circuit features a modified tunable open stub matching to achieve a reconfigurable multiband response. The LNA adopts a varactor diode in the input matching stage to achieve reconfigurable modes. Two bias conditions for the varactor diode are analysed. The forward bias condition yields a wideband mode (1.6 to 2.5 GHz) and zero bias results in a concurrent dual band mode (0.9 and 1.7-2.5 GHz). In reverse bias condition, the bias voltage of varactor diode (V d−rb) can be tuned to achieve one single band mode (1 GHz), and a tunable concurrent dual band mode, where the first band is fixed at 1 GHz and the second band is continuously tunable from 1.7 to 2.5 GHz. The LNA is fabricated in microwave integrated circuit process on an FR-4 board. The measured power gain is 7-15 dB and noise figure is 1.2-2.2 dB across all bands. The measured 1 dB compression (P 1 dB) is −4, −3 and −6 dBm at 0.9, 1 and 2.4 GHz, respectively.

show abstract

Design and Analysis of a Continuously Tunable Low Noise Amplifier for Software Defined Radio

Cited by 10 publications

References 23 publications

A gyrator-C active inductor based tunable low noise amplifier for sub-GHz frequency range

A gyrator-C active inductor based tunable low noise amplifier for sub-GHz frequency range

Integrated On-Chip Transformers: Recent Progress in the Design, Layout, Modeling and Fabrication

Design of a multimode tunable low noise amplifier for software defined radios

Contact Info

Product

Resources

About