Showing papers by "Jayanta Mukherjee published in 2021"
TL;DR: An inductorless wideband balun low noise amplifier (LNA) for low power sub-GHz IoT applications and uses nMOS-pMOS configuration for doubling the transconductance and gain efficiency.
Abstract: This brief presents an inductorless $g_{m}$ -boosted wideband balun low noise amplifier (LNA) for low power sub-GHz IoT applications. The proposed common source (CS) - common gate (CG) based $g_{m}$ -boosted balun LNA uses nMOS-pMOS configuration for doubling the transconductance and gain efficiency. Loads of CS and CG stages are capacitively coupled to remove the tradeoff between voltage gain and voltage headroom. In addition to this, the circuit employs noise cancelation using the CS-CG pair. The LNA is implemented in 0.18 $\mu \text{m}$ RFCMOS process, which achieves a maximum voltage gain of 19.6 dB with a minimum noise figure (NF) of 3.6 dB. The 3-dB bandwidth ranges from 0.13 GHz to 0.93 GHz. The minimum IIP3 and IIP2 measured are −8.5 dBm and 12 dBm, respectively. The LNA core area is 0.18 $mm^{2}$ and dissipates a total power of 3 mW from 1.8 V power supply.
19 citations
TL;DR: In this article, two phase frequency detector (PFD) architectures and a PFD with lock-in detection (LID) are proposed that are designed using the new techniques for selectively resetting the outputs to achieve improved average gain with a lower blind zone.
6 citations
22 Mar 2021
TL;DR: In this paper, the authors proposed a mathematical model to compute the bi-directional loss of an automotive radar in the presence of a bumper with multi-layered paint, which takes into account the shape of the bumper and compares it with a proprietary algorithm.
Abstract: In this paper, we propose a mathematical model to compute the bi-directional loss of an automotive radar in the presence of a bumper with multi-layered paint. The proposed model uses a physical optics (PO) based approximation for the reflective and dielectric losses. The model takes into account the shape of the bumper and compares it with a proprietary algorithm. The model is applied on a six-element microstrip array antenna placed behind a curved bumper, with and without the presence of multiple paint layers. The bidirectional loss, in the broad-side direction, as obtained from the model is 4.6 dB due to the presence of the bumper with a single paint layer and 8.8 dB when the number of paint layers is five.
3 citations
1 citations
22 Mar 2021
TL;DR: In this article, a meandering line fed-patch periodic leaky wave antenna (P-LWA) is designed to achieve broadside beam scanning and consistent gain response at 7.7 GHz.
Abstract: In this work, a meandering line fed-patch periodic-leaky wave antenna (P-LWA) is designed to achieve broadside beam scanning and consistent gain response. The meandering line is provided a vertical offset (s) away from the longitudinal axis of the unit cell (UC). The combine effect of meandering in the feeding line and its offset acts as a self matching network that enables open stop-band (OSB) elimination at broadside. Consequently, there is no extra matching circuit used in the unit cell which facilitates easy analysis and optimization. The optimized broadside frequency (fB) for the P-LWA is 7.7 GHz. To verify the proposed concept, a prototype of the proposed P-LWA is fabricated and measured. The measured value of impedance bandwidth and maximum realized gain are 36% and 15.4 dBi, respectively.