A 54–862-MHz CMOS Transceiver for TV-Band White-Space Device Applications

Kim, Jongsik; Lee, Seung Jun; Kim, Seung-Soo; Ha, Jong Ok; Eo, Yun Seong; Shin, Hyunchol

doi:10.1109/tmtt.2010.2103089

Cited by 36 publications

(21 citation statements)

References 32 publications

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“…The maximum improvement of stop-band attenuation is almost 17 dB when the cutoff frequency is 100 MHz. As a result, in the final full transmitter circuit measurement [3], the 7 th harmonic component is found to be dramatically suppressed by 24.6 dB when the RF tunable filter is activated. Further measurements show that the in-band harmonics are always below −42 dBc across the full TV-band thanks to the significant contribution of the RF tunable filter.…”

Section: Circuit Design and Resultsmentioning

confidence: 99%

“…The white space device can enable long-distance and robust wireless internet connection since the TV band is better for reaching farther with less attenuation compared to the existing 2.4 or 5 GHz airwaves. Along with IEEE 802.22 cognitive radio based wireless regional area network (WRAN) standardization, the TV-band CMOS transceiver implementation efforts have started to appear in the literature [2,3].…”

Section: Introductionmentioning

confidence: 99%

“…By working with harmonic rejection mixer (HRM) in the transmitter, the RF tunable filter significantly rejects the in-band harmonic emission level in the TV white space transmitter [3].…”

Section: Introductionmentioning

confidence: 99%

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A CMOS RF tunable filter for TV white space transmitter applications

Kim

Shin

2011

IEICE Electron. Express

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A UHF-band RF tunable filter is developed for TV white space CMOS transmitter applications. It is based on the combined Sallen-Key and LC notch structure. The inherent transmission zero of the Sallen-Key core is carefully chosen to suppress the 7 th -harmonic component of the transmitter output, and the LC notch filter is set to suppress the 9 th -harmonic component. The filter is built in 0.18-μm CMOS process and consumes 6.2-mA from a 1.8-V supply. The filter's cutoff frequency is tuned from 100-MHz to 500-MHz in five steps. It is successfully adopted in a TV white space CMOS transmitter integrated circuit. Keywords: RF tunable filter, Sallen-Key filter, harmonic rejection filter Classification: Integrated circuits References[1] "Second report and order and memorandum opinion and order: Unlicensed operation in the TV broadcast bands," FCC, Washington, DC, FCC ET Docket 04-186, Nov. 2008.

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Section: Circuit Design and Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A CMOS RF tunable filter for TV white space transmitter applications

Kim

Shin

2011

IEICE Electron. Express

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“…3. The considered SSB mixer consists of two 90-degree phase shifters and two double side band mixers as proposed in [11].…”

Section: Frequency Synthesizer Architecturementioning

confidence: 99%

Very Wide Range Frequency Synthesizer Architecture for Avionic SDR Applications

Ismaili

Ajib

Gagnon

et al. 2015

2015 IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB)

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Abstract-This paper presents a very wide range frequency synthesizer architecture appropriate to avionic software defined radio (SDR) applications. The synthesizer generates a continuous carrier frequencies range between 187 MHz and 12 GHz that covers most of avionic communication applications. The covered range is distributed into twenty sub-bands by using a voltage controlled oscillator (VCO). The considered VCO is able to achieve a tuning range from 10 GHz to 12 GHz (18.2%) and from 7 GHz to 8.5 GHz (19.35%). It includes a capacitor bank, varactors, and switched inductors and is designed in 0.13 µm CMOS technology. Using the advanced design system (ADS) simulation tool and SpectreRF simulator, the proposed VCO exhibits a phase noise of -125 dBc/Hz at 12 GHz and at a 10 MHz offset frequency with a power consumption of 4.1 mW. At 10 GHz, the simulated synthesizer phase noise is of -102 dBc/Hz at a 1 MHz frequency offset. In addition, the loop bandwidth of the phase locked loop (PLL) is 1.1 MHz whereas the settling time is 3.64 µs.

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“…Fig. 1(c) presents a wideband frequency synthesizer that uses multiple band-selecting dividers and mixers [14]- [25]. This architecture requires only one PLL and VCO to synthesize a fundamental frequency.…”

mentioning

confidence: 99%

Enhancement of Frequency Synthesizer Operating Range Using a Novel Frequency-Offset Technique for LTE-A and CR Applications

Peng

Lee

Chen

et al. 2013

IEEE Trans. Microwave Theory Techn.

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Abstract-This paper presents a novel frequency-offset technique to enhance operating range of frequency synthesizers for long-term evolution-advanced and cognitive-radio applications. Conventional wideband frequency synthesizers typically have complex architectures, such as multiple phase-locked loops (PLLs), multiple voltage-controlled oscillators, and multiple mixers, to increase operating range. These complex architectures have high cost and power consumption. In this study, the proposed technique substantially increases the operating range of the frequency synthesizer by using only a single PLL to simultaneously lock two mixing oscillators. The presented frequency synthesizer is implemented using 0.18-m CMOS technology. Performance tests demonstrate that the frequency synthesizer achieves a very wide operating frequency range from 50 MHz to 4.8 GHz with a phase noise lower than 100 dBc/Hz at a frequency offset of 100 kHz. The period of stability for a switching frequency of 40 MHz is shorter than 40 s. Index Terms-Cognitive radio (CR), long-term evolution-advanced (LTE-A), phase-locked loop (PLL), wideband frequency synthesizer, wideband voltage-controlled oscillator (VCO).

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A 54–862-MHz CMOS Transceiver for TV-Band White-Space Device Applications

Cited by 36 publications

References 32 publications

A CMOS RF tunable filter for TV white space transmitter applications

A CMOS RF tunable filter for TV white space transmitter applications

Very Wide Range Frequency Synthesizer Architecture for Avionic SDR Applications

Enhancement of Frequency Synthesizer Operating Range Using a Novel Frequency-Offset Technique for LTE-A and CR Applications

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