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This paper presents an ultra-broadband low-noise amplifier (LNA) operating from 16 to 43 GHz in a 0.25 pm SiGe:C BiCMOS technology. Across this band, the LNA achieves simultaneous low-noise performance (2.5–4.0 dB) and power matching (S11 < −10 dB) using dual-LC tank matching. The measured minimal noise figure is 2.5 dB at 26 GHz with an average value of 3.25 (±0.75) dB from 16 to 44 GHz. The best...
This paper presents a design of fully differential low-noise amplifier (LNA) used for 60 GHz low power wireless communication in 65 nm CMOS technology. The proposed LNA consists of an input stage employing capacitive cross-coupling technique and an gain stage using current-reuse techniques. The simulated amplifier achieves both input and output matching better than −15dB, a forward gain of 15 dB,...
The 60GHz band is promising for applications such as high-speed short-range wireless personal area network (WPAN), real time video streaming at rates of several Gbps, automotive radar, and mm-Wave imaging, since it provides a large amount of bandwidth that can freely (i.e. without a license) be used worldwide. However, transceivers at 60GHz pose several additional challenges over microwave transceivers...
This paper present a 60 GHz injection locked oscillator in 65-nm CMOS technology. The injection locked oscillator is a key component to realize an ultra-low power self-mixing architecture wake-up radio. In this paper, different methods of injecting a signal into the oscillator are discussed and the current re-use method is implemented to increase the sensitivity and improve the isolation while at...
This paper presents a 30 GHz tunable transformer-based duplexer with dual-antenna configuration. By using orthogonal linearly-polarized antennas and the transformer-based duplexer, the transmitter and receiver duplexes the two antennas with orthogonal circularly-polarized signals. Furthermore, magnetic tuning is introduced to improve isolation in case of practical imbalances. Measurement results demonstrate...
This paper presents a scalable baseband phase shifter implemented in a 40-nm CMOS technology for phased array applications. The baseband phase shifter makes use of the quadrature signals available from the I/Q mixers. By using a resistor chain at the load of the mixer, uniform levels of I and Q signals can be selected by means of gm-cells that can be enabled individually for realizing different phase...
This paper presents a 20 GHz low noise amplifier (LNA) with notch filtering from 27.5 GHz to 31 GHz in a 0.25 µm SiGe:C BiCMOS technology. Notch filters are proposed to be implemented at different stages to have minor impact on the noise figure (NF), while achieving high attenuation around 30 GHz. In comparison with a reference LNA without filtering, it achieves overall filtering of more than −30...
In this paper the architecture and performance of a co-integrated 60 GHz on-chip wireless energy harvester and ultra-low power (ULP) radio in 65-nm CMOS are discussed. Integration of an on-chip antenna with wireless power receiver and wireless data transfer module is the crucial next step to achieve compact and high efficiency fully-integrated monolithic wireless sensor nodes. A single-pole-single-throw...
This paper presents a 48 GHz high resolution LO-path phase shifter implemented in 40-nm low-power CMOS technology. The full 360° phase shift tuning is implemented by a switched capacitor loaded tunable transmission line for fine tuning, in combination with a selection of one out of the N×45° phase steps available from the frequency divider-by-4 for coarse tuning. The measured phase shift resolution...
This paper presents a 1.8GHz RF amplifier implemented in 140nm CMOS with frequency-independent blocker suppression. The functionality is obtained by adaptation of a nonlinear current transfer according to the blocker amplitude. In the presence of a 0 – 11dBm RF blocker a voltage gain of 7.6 to 9.4dB and IIP3 >4dBm are measured, while the blocker is suppressed by more than 39dB. In case of no blocker...
In the future dense 60 GHz wireless environments, co-channel interference (CCI) is a potential problem that degrades the link quality. In this paper, a genetic algorithm (GA) assisted analog adaptive array is proposed for 60 GHz indoor applications to mitigate the CCI. The GA optimizes the weights on each receiver path to attenuate CCI from different directions and improve signal-to-interference-plus-noise...
In this paper an approach is proposed for the suppression of a large unwanted signal without making use of frequency selectivity, but rather by exploiting a nonlinear transfer function. The general requirements for large-signal suppression by this technique are analyzed in the context of a multi-standard transceiver. Also the consequences for weak desired signals and external interference are being...
In this paper an approach is proposed for the suppression of a large unwanted signal without making use of frequency selectivity, but rather by exploiting a nonlinear transfer function. The general requirements for large-signal suppression by this technique are analyzed in the context of a multi-standard transceiver. Also the consequences for weak desired signals and external interference are being...
In this paper the requirements and resulting costs for the digital hardware are discussed to steer a nonlinear interference suppression circuit (NIS). This NIS circuit suppresses a strong unwanted RF blocker by exploiting a nonlinear transfer function in a radio receiver. Nonlinear transfer functions enable frequency-independent amplitude discrimination because they do not obey to the principle of...
Reduction of the power consumption of analog circuits used in RF receivers, leads to decreased linearity. Digital algorithms can be used in the receiver to compensate for the distortion components that are created due to this. This leads to a trade-off between power consumption in the analog domain and digital domain. Most research concerning this topic concentrates on signal processing, and uses...
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