scholarly journals A Four-Channel CMOS Front-End for Interference-Robust GNSS Receiver

Electronics ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 291
Author(s):  
Fang Han ◽  
Jian Gao ◽  
Xiaoran Li ◽  
Zhiming Chen
Keyword(s):  
Local Oscillator ◽  
Cmos Technology ◽  
Satellite System ◽  
Low Noise ◽  
Low Noise Amplifiers ◽  
Third Order ◽  
Front End ◽  
Mixer Design ◽  
Linearity Improvement ◽  
Global Navigation Satellite

A four-channel receiver front-end is designed and implemented for interference- and jamming-robust global navigation satellite system (GNSS) in a 0.18-μm CMOS technology. The front-end consists of four identical RF-to-IF signal paths including low-noise amplifiers (LNAs), mixers and IF amplifiers. In addition, it also includes a phase-locked loop (PLL), which synthesizes the local oscillator (LO) signal, and a serial peripheral interface (SPI) for parameter adjustment. To improve the interference and jamming robustness, a novel linearity improvement technology and LO duty cycle adjustment method are applied in LNA and mixer design, respectively. The receiver achieves a gain of 40 dB, an input-referred third-order intercept point (IIP3) of −8 dBm and a jammer-to-signal power ratio (JSR) of 72 dB under 1.8-V and 3.3-V supply, while occupying a 4 × 5 mm2 die area including the electrostatic discharge (ESD) I/O pads.

6–12 GHz double-balanced image-reject mixer MMIC in 0.25 µm AlGaN/GaN technology

2015 ◽  
Vol 7 (3-4) ◽  
pp. 307-315 ◽  
Author(s):  
Marc van Heijningen ◽  
Jeroen A. Hoogland ◽  
Peter de Hek ◽  
Frank E. van Vliet
Keyword(s):  
Integrated Circuits ◽  
Intermediate Frequency ◽  
Local Oscillator ◽  
Input Power ◽  
Low Noise ◽  
Low Noise Amplifiers ◽  
Conversion Loss ◽  
Front End ◽  
Signal Amplifier ◽  
Measurement Results

The front-end circuitry of transceiver modules is slowly being updated from GaAs-based monolithic microwave integrated circuits (MMICs) to Gallium-Nitride (GaN). Especially GaN power amplifiers and T/R switches, but also low-noise amplifiers (LNAs), offer significant performance improvement over GaAs components. Therefore it is interesting to also explore the possible advantages of a GaN mixer to enable a fully GaN-based front-end. In this paper, the design-experiment and measurement results of a double-balanced image-reject mixer MMIC in 0.25 μm AlGaN/GaN technology are presented. First an introduction is given on the selection and dimensioning of the mixer core, in relation to the linearity and conversion loss. At the intermediate frequency (IF)-side of the mixer, an active balun has been used to compensate partly for the loss of the mixer. An on-chip local-oscillator (LO) signal amplifier has been incorporated so that the mixer can function with 0 dBm LO input power. After the discussion of the circuit design the measurement results are presented. The performance of the mixer core and passive elements has been demonstrated by measurements on a test-structure. The mixer MMIC measured conversion loss is <8 dB from 6 to 12 GHz, at 1 GHz IF and 0 dBm LO power. The measured image rejection is better than 30 dB.

scholarly journals Design of a Multiband Global Navigation Satellite System Radio Frequency Interference Monitoring Front-End with Synchronized Secondary Sensors

Sensors ◽  
2018 ◽  
Vol 18 (8) ◽  
pp. 2594
Author(s):  
Aiden Morrison ◽  
Nadezda Sokolova ◽  
James Curran
Keyword(s):  
Radio Frequency ◽  
Global Navigation Satellite System ◽  
Low Cost ◽  
Satellite System ◽  
Radio Frequency Interference ◽  
Navigation Satellite ◽  
Inertial Measurement ◽  
Front End ◽  
Global Navigation ◽  
Global Navigation Satellite

This paper investigates the challenges of developing a multi-frequency radio frequency interference (RFI) monitoring and characterization system that is optimized for ease of deployment and operation as well as low per unit cost. To achieve this, we explore the design and development of a multiband global navigation satellite system (GNSS) front-end which is intrinsically capable of synchronizing side channel information from non-RF sensors, such as inertial measurement units and integrated power meters, to allow the simultaneous production of substantial amounts of sampled spectrum while also allowing low-cost, real-time monitoring and logging of detected RFI events. While the inertial measurement unit and barometer are not used in the RFI investigation discussed, the design features that provide for their precise synchronization with the RF sample stream are presented as design elements worth consideration. The designed system, referred to as Four Independent Tuners with Data-packing (FITWD), was utilized in a data collection campaign over multiple European and Scandinavian countries in support of the determination of the relative occurrence rates of L1/E1 and L5/E5a interference events and intensities where it proved itself a successful alternative to larger and more expensive commercial solutions. The dual conclusions reached were that it was possible to develop a compact low-cost, multi-channel radio frequency (RF) front-end that implicitly supported external data source synchronization, and that such monitoring systems or similar capabilities integrated within receivers are likely to be needed in the future due to the increasing occurrence rates of GNSS RFI events.

Ultra-low Residue Flux Applications in RF Front-End Packages

2020 ◽  
Vol 2020 (1) ◽  
pp. 000125-000130
Author(s):  
Leo Hu ◽  
Sze Pei Lim
Keyword(s):  
Integrated Circuits ◽  
Flip Chip ◽  
Low Noise ◽  
Low Noise Amplifiers ◽  
Reflow Process ◽  
Reliability Study ◽  
Rf Switches ◽  
Front End ◽  
Rf Front End ◽  
Package Reliability

Abstract With the leap into the 5G era, the demand for improvements in the performance of mobile phones is on the rise. This is also true for the quantity of radio frequency (RF) front-end integrated circuits (ICs), especially for RF switches and low noise amplifiers (LNA). It is well-known that improvements in performance depend on the combination of new design, package technology, and choice of materials. Ultra-low residue (ULR) flux is an innovative, truly no-clean, flip-chip bonding material. By using ULR flux, the typical water-wash cleaning process can be removed and, in some instances, package reliability can be improved as well. This simplified assembly process will help to reduce total packaging costs. This paper will discuss the application of ULR fluxes on land grid arrays (LGAs) and quad-flat no-leads/dual-flat no-leads (QFN/DFN) packages for RF front-end ICs, as well as the reflow process. The solder joint strength and reliability study will be shared as well.

Design of a Front-End for Satellite Receiver

2016 ◽  
Vol 6 (5) ◽  
pp. 2282 ◽  
Author(s):  
Tran Van Hoi ◽  
Ngo Thi Lanh ◽  
Nguyen Xuan Truong ◽  
Nguyen Huu Duc ◽  
Bach Gia Duong
Keyword(s):  
Dynamic Range ◽  
Noise Figure ◽  
High Sensitivity ◽  
Wide Band ◽  
Local Oscillator ◽  
Low Noise ◽  
Voltage Controlled Oscillator ◽  
Front End ◽  
L Band ◽  
Satellite Receiver

<p>This paper focuses on the design and implementation of a front-end for a Vinasat satellite receiver with auto-searching mechanism and auto-tracking satellite. The front-end consists of a C-band low-noise block down-converter and a L-band receiver. The receiver is designed to meet the requirements about wide-band, high sensitivity, large dynamic range, low noise figure. To reduce noise figure and increase bandwidth, the C-band low-noise amplifier is designed using T-type of matching network with negative feedback and the L-band LNA is designed using cascoded techniques. The local oscillator uses a voltage controlled oscillator combine phase locked loop to reduce the phase noise and select channels. The front-end has successfully been designed and fabricated with parameters: Input frequency is C-band; sensitivity is greater than -130 dBm for C-band receiver and is greater than -110dBm for L-band receiver; output signals are AM/FM demodulation, I/Q demodulation, baseband signals.</p>

Design and Characterization of a Low-Noise Front-End Readout ASIC in 0.18- $\mu$ m CMOS Technology for CZT/Si-PIN Detectors

2018 ◽  
Vol 65 (5) ◽  
pp. 1203-1211 ◽  
Author(s):  
W. Gao ◽  
S. Li ◽  
Y. Duan ◽  
P. Huang ◽  
Z. Li ◽  
...  
Keyword(s):  
Cmos Technology ◽  
Low Noise ◽  
Front End

scholarly journals Innovative Strategy for Mixer Design Optimization Based on gm/ID Methodology

Electronics ◽  
2019 ◽  
Vol 8 (9) ◽  
pp. 954 ◽  
Author(s):  
Giovanni Piccinni ◽  
Claudio Talarico ◽  
Gianfranco Avitabile ◽  
Giuseppe Coviello
Keyword(s):  
Power Dissipation ◽  
Figure Of Merit ◽  
Noise Figure ◽  
Cmos Technology ◽  
Third Order ◽  
Innovative Strategy ◽  
The Core ◽  
Mixer Design ◽  
Down Conversion ◽  
A Current

This work introduces a process to optimize the design of a down-conversion mixer using an innovative strategy based on the gm/ID methodology. The proposed process relies on a set of technology-oriented lookup tables to optimize the trade-off between gain, power dissipation, noise, and distortion. The design is implemented using a 0.13 μm CMOS technology, and to the best of our knowledge, it possesses the best (post-layout simulation) figure of merit (FOM) among the works presented in literature. The FOM is defined as the product of gain and third-order intercept divided the product between average noise figure and power dissipation. Finally, the core of the mixer takes only 31 µm by 28 µm and it draws a current of 1 mA from the 1.5 V DC supply.

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