Analysis and Design of a Millimeter-Wave Cavity-Backed Circularly Polarized Radiator Based on Fundamental Theory of Multi-Port Oscillators

Nazari, Peyman; Jafarlou, Saman; Heydari, Payam

doi:10.1109/jssc.2017.2753823

Cited by 15 publications

(2 citation statements)

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“…At the core of the PLL lies the VCO and divider chain determining the phase-noise, tuning range, and output power [52]. At THz frequencies, a multi-port oscillator circuit with multiple active devices exciting a multi-port passive structure, as a shared resonator, can produce much higher oscillation power and efficiency than current oscillators [91]. However, the use of multiple independent elements to excite a multi-port passive structure can lead to multiple stable oscillation states [92]- [94].…”

Section: B Thz Lo Generation and Distributionmentioning

confidence: 99%

“…Inherent to such systems, this attribute calls for a careful study that can quantitatively discover oscillation conditions that result in different oscillation states within a multi-port structure consisting of multiple active devices and passive networks. Reference [91] conducted a comprehensive study of the multi-port oscillators. Among multi-port oscillators, the ones with circular geometry are considered to be viable topology for low-noise THz oscillators [95].…”

Section: B Thz Lo Generation and Distributionmentioning

confidence: 99%

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Terahertz Integrated Circuits and Systems for High-Speed Wireless Communications: Challenges and Design Perspectives

Heydari

2021

IEEE Open J. Solid-State Circuits Soc.

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This paper presents challenges and design perspectives for terahertz (THz) integrated circuits and systems. THz means different things to different people. From International Telecommunication Union (ITU) perspective, THz radiation primarily means frequency range from 300 − 3000 GHz. However, recently, a more expansive definition of THz has emerged that covers frequencies from 100 GHz to 10 THz, which includes sub-THz (100 − 300 GHz), ITU-defined THz frequencies. This definition is now commonly used by communication theorists, and since this paper is intended for people with a wide variety of expertise in system and circuit design, we have adopted the latter definition. The paper brings to the open unmitigated shortcomings of conventional transceiver architectures for multi gigabit-per-second wireless applications, unfolds challenges in designing THz transceivers, and provides pathways to address these impediments. Furthermore, it goes through design challenges and candidate solutions for key circuit blocks of a transceiver including front-end amplifiers, local oscillator (LO) circuit and LO distribution network, and antennas intended for frequencies above 100 GHz.

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Section: B Thz Lo Generation and Distributionmentioning

confidence: 99%

Section: B Thz Lo Generation and Distributionmentioning

confidence: 99%