Gilbert upconversion mixers using single‐band/dual‐band LC current combiners

Syu, Jin Siang; Meng, Chinchun; Yen, Ying Chieh; Huang, Guo Wei

doi:10.1002/mop.24433

Cited by 5 publications

(2 citation statements)

References 10 publications

(10 reference statements)

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“…Conversely, to improve detection accuracy, a double‐sideband system has been proposed using the frequency tuning technique for eliminating the null detection point . In addition, a quadrature topology designed for a wireless communication system can also increase the detection accuracy . Although these architectures can improve accuracy, the requirement of two baseband signal‐processing paths for the baseband hardware of a quadrature system or more components for a double‐sideband system results in higher power consumption .…”

Section: Introductionmentioning

confidence: 99%

Direct conversion Doppler radar vital sign detection system using power management technique

Lee

Lin

Chen

et al. 2014

Micro & Optical Tech Letters

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Furthermore, the tunable operation frequency range of the proposed impulse generator is experimentally studied. This impulse generator can work well at any input frequency around 1-15 MHz. Figure 4 displays the experimental results of the final output impulses at operation frequencies of 1, 5, 10, and 15 MHz. It can be recognized that the lower frequency, the slightly higher amplitude. This is attributed to the recovery time of the RC-circuit of the collector resistance and the output coupling capacitor. When frequency is higher the period is shorter so that the output coupling capacitor has shorter time for recovery. Consequently, the output amplitude is lower. Therefore, by adjusting the values of the collector resistance and the output coupling capacitor, we can broaden the working frequency range. In addition, the fabricated impulse generator was checked by HP 8593E RF spectrum analyzer with generated high-order harmonic up to 10 GHz.With such output UWB short impulses, the impulse generator can be used for many practical applications in electronics and optics. By utilizing the fast leading edge characteristic of the generated short impulses for driving actively mode-locked fiber lasers, we may anticipate a possible generation of shorter optical pulses than reported in [6]. This issue is currently under investigation and will be reported elsewhere. CONCLUSIONIn this article, we have described a method for generating UWB picosecond impulses with fast fall-time based on the fast switchon characteristic of a broadband bipolar transistor and the edge compression characteristic of a NLTL comb generator. The experimental results showed that the generated short impulses had a pulse-width of about 725 ps, a fall-time of 180 ps, and a peak power of 1 W at 50 X. ABSTRACT: This article is the first to present a low power consumption direct conversion Doppler radar vital sign detection system using a power management technique to detect biomedical signals. The optimal pulse bias with simultaneous switching noise considered was designed to decrease power consumption of the sensor. A noncontact vital sign detection measurement using the optimal pulse bias was performed on a human subject. Based on experimental results, the presented simple and low power system can accurately detect human cardiopulmonary activity, including respiration and heartbeat. Calculated physiological signal amplitudes based on a spectral analysis validates the detection result from presented work. When compared with the sensor using a power amplifier, the proposed sensor can achieve low power dissipation for biomedical monitoring and green energy applications.

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Section: Introductionmentioning

confidence: 99%

Direct conversion Doppler radar vital sign detection system using power management technique

Lee

Lin

Chen

et al. 2014

Micro & Optical Tech Letters

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“…Some GaAs pHEMT active mixers e.g., distributed mixer [7, 8], or traveling‐wave mixer [9] have been reported to have wideband capability, high gain and good linearity, but their disadvantages are their large size and high power dissipation. The Gilbert‐cell mixer demonstrates better LO/RF isolation, due to efficient phase‐reversing that uses transistor switches and a high conversion gain, for high transistor performance, using SiGe‐base HBT [10, 11], BiCMOS [12] and CMOS [13, 14] technologies. The power dissipation and chip size are smaller than those for a distributed mixer.…”

Section: Introductionmentioning

confidence: 99%

A 30–65 GHz wideband double‐balanced gilbert‐cell mixer using GaAs pHEMT technology

Kao

Yeh

et al. 2012

Micro & Optical Tech Letters

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This article presents a wideband, double‐balanced microwave/millimeter‐wave Gilbert‐cell mixer, using 0.15 μm GaAs pHEMT technology. Two baluns and a matching network are used in RF‐ and LO‐ports to convert single‐ended signals to differential signals, for wideband use. This mixer demonstrates an average conversion gain is 2.22 ± 1.5 dB at PLO = 2 dBm, from 30 to 65 GHz. The LO‐to‐RF and LO‐to‐IF isolations are all better than 28 dB, between 30 and 65 GHz. The measured P1dB and IIP3 are 5 dBm at 40 GHz and 10 dBm at 60 GHz, respectively. The mixer occupies a chip area, including probing pads, of 1.68 mm2 and consumes 21 mA, with a supply voltage of 5V. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:1196–1200, 2012

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67–80 GHz double‐balanced Gilbert‐cell mixer in 0.1 μm GaAs pHEMT technology

et al. 2016

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A 67-80 GHz double-balanced Gilbert-cell mixer fabricated in 0.1 μm gallium arsenide pseudomorphic high-electron-mobility transistor technology is presented. Two Marchand baluns were placed in RF and local oscillator (LO) input ports to convert single-ended signals to differential signals for wideband use. A differential amplifier between the switch and output stages was used to enhance the conversion gain (CG). The mixer demonstrated an average CG of 14.1 ± 2.1 dB at an LO power of 0 dBm from 67 to 80 GHz. The measured intermediate frequency 3 dB bandwidth was 3 GHz and the input 1 dB compression point was −4.8 dBm.

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Gilbert upconversion mixers using single‐band/dual‐band LC current combiners

Cited by 5 publications

References 10 publications

Direct conversion Doppler radar vital sign detection system using power management technique

Direct conversion Doppler radar vital sign detection system using power management technique

A 30–65 GHz wideband double‐balanced gilbert‐cell mixer using GaAs pHEMT technology

67–80 GHz double‐balanced Gilbert‐cell mixer in 0.1 μm GaAs pHEMT technology

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