A Push-Push VCO With 13.9-GHz Wide Tuning Range Using Loop-Ground Transmission Line for Full-Band 60-GHz Transceiver

Abstract

A 59-GHz push-push voltage-controlled oscillator (VCO)-based on 0.18-m SiGe BiCMOS technology-for a full-band 60-GHz transceiver was developed. The VCO uses a loop-ground transmission line (LG-TML) composed of signal lines (half wavelength at fundamental frequency) and secondary lines (quarter wavelength at second harmonic frequency). The LG-TML makes it possible to output both a large signal at second harmonic frequency and an adequate signal at the fundamental frequency for driving a prescalar, while it prevents the Miller effect of the HBTs in the VCO from increasing and negative conductance from being reduced. As a result, the VCO achieves high output power of +1.5 dBm, while maintaining wide tuning range of 13.9 GHz (26% of the center oscillation frequency). Moreover, it exhibits a low phase noise of -108 dBc/Hz at a 1-MHz offset frequency and achieves a state-of-the-art figure of merit (FOM ) of -189.6 dB. Index Terms-IEEE 802.15.3c, loop-ground transmission line, millimeter-wave communication, push-push VCO, SiGe BiCMOS, VCO.

Analysis of Main LC-VCO Parameters for Multistandard Tranceivers

“…Iš LC-ĮVG maitinimo įtampos pasiskirstymo apžvelg-tuose darbuose (1 lentelė) matoma, kad LC-ĮVG maitinimo įtampos skirtingo technologinio žingsnio IG kinta nuo 0,3 V (Yang et al 2013) iki 3 V (Nakamura et al 2012). Analizuojant maitinimo įtampas, 180-130 nm technologinio žingsnio integriniame grandyne matyti didesnės maitinimo įtampos vertės (3-0,4 V) nei 64-40 nm technologinio žingsnio integriniame grandyne (1,2-0,3 V).…”

Advances in Silicon Based Millimeter-Wave Monolithic Integrated Circuits

“…Figure 17 illustrates the measured phase noise of the MMW SiGe VCOs. In [173], a 52 GHz VCO, which employs loop-ground transmission line, is proposed to enlarge the tuning range and output power without sacrificing phase noise. In [174], a high power efficiency inductive tuning VCO was reported.…”

Current reused Colpitts VCO and frequency divider with quadrature outputs

“…The larger the load Z L , the smaller the input negative conductance generated, so more difficulty for the VCO to start up oscillation, and lead to small oscillation amplitude and poor phase noise. In [6], a loop-ground transmission line is adopted to suppress the miller effect, and in [7], an inductor is added between the transistor's gate and drain to compensate the parasitic capacitance C gd . However, they are both area consumptive and with limited frequency compensation range.…”