The future of high frequency circuit design

Hajimiri, Ali

doi:10.1109/essderc.2009.5331369

Cited by 4 publications

(1 citation statement)

References 27 publications

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“…reduce manufacturing cost since both RF front-end and digital baseband can be integrated together to create a single chip implementation [2], [3].…”

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confidence: 99%

A Low Phase Noise Quadrature Injection Locked Frequency Synthesizer for MM-Wave Applications

Musa

Murakami

Sato

et al. 2011

IEEE J. Solid-State Circuits

115

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This paper proposes a 60 GHz quadrature PLL frequency synthesizer for the IEEE802.15.3c with wide tuning range and low phase noise. The synthesizer is constructed using a 20 GHz PLL that is coupled with a Quadrature Injection Locked Oscillator (QILO) as a frequency tripler to generate the 60 GHz signal. The 20 GHz PLL generates a signal with a phase noise that is lower than dBc/Hz using tail feedback to improve the phase noise while having a 17% tuning range. The proposed 60 GHz QILO uses a combination of parallel and tail injection to enhance the locking range by improving the QILO injection efficiency at the moment of injection and has a 12% tuning range. Both the 20 GHz PLL and the QILO were fabricated as separate chips using a 65 nm CMOS process and measurement results show a phase noise that is less than 95 dBc/Hz@1 MHz at 60 GHz while consuming 80 mW from a 1.2 V supply. To the author's knowledge this phase noise is about 20 dB better than recently reported QPLLs and about 10 dB compared to differential PLLs operating at a similar frequency and at a similar offset.

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“…reduce manufacturing cost since both RF front-end and digital baseband can be integrated together to create a single chip implementation [2], [3].…”

mentioning

confidence: 99%

A Low Phase Noise Quadrature Injection Locked Frequency Synthesizer for MM-Wave Applications

Musa

Murakami

Sato

et al. 2011

IEEE J. Solid-State Circuits

115

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5G wideband on‐chip dipole antenna for WSN soil moisture monitoring

Elsheakh

Shawkey

2021

Int J RF Mic Comp-Aid Eng

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Recently, soil dielectric constant detection has been used in the irrigation of vastly differing farming conditions. Soil monitoring has seen a push toward fifth generation (5G) telecommunications technology, due to the higher speed and bandwidth required to connect a huge number of sensor nodes simultaneously. A novel architecture for a fully integrated, unequal arms dipole antenna is presented in this article. The proposed on‐chip antenna is implemented using UMC180 nm CMOS technology. A dipole radiator is added on the upper metal layer, a ground sheet set at the lower metal layer and a patch layer is added on the intermediate metal layer. This configuration has improved the antenna impedance bandwidth by 38%. In addition, it increased the electrical length of the dipole antenna to reduce the antenna resonant frequency by 10 GHz. The proposed antenna has a total area 1300 × 250 μm, and its wide bandwidth extends from 21 to 40 GHz at reflection coefficient |S11| < –7 dB, which makes it suitable for on‐chip wireless sensor network applications in 5G technology. All Simulations are completed by using the Ansys HFSS (high‐frequency structure simulator) ver.15 and the simulated results show a good comparison with measurements. To investigate the proposed antenna's performance in different environmental conditions, practical measurements for soil dielectric constant in different compositions with variable moisture ratios are applied. The resulting values are used in antenna simulation and have ultimately proved the antenna's improved capability to sense soil moisture in different conditions.

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Large-scale terahertz active arrays in silicon using highly-versatile electromagnetic structures

Wang

Zhang

et al. 2017

2017 IEEE International Electron Devices Meeting (IEDM)

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The future of high frequency circuit design

Cited by 4 publications

References 27 publications

A Low Phase Noise Quadrature Injection Locked Frequency Synthesizer for MM-Wave Applications

A Low Phase Noise Quadrature Injection Locked Frequency Synthesizer for MM-Wave Applications

5G wideband on‐chip dipole antenna for WSN soil moisture monitoring

Large-scale terahertz active arrays in silicon using highly-versatile electromagnetic structures

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