2009 IEEE Radio Frequency Integrated Circuits Symposium 2009
DOI: 10.1109/rfic.2009.5135608
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Design of a CMOS 12 GHz Rotary Travelling Wave Oscillator with switched capacitor tuning

Abstract: This paper presents the design methodology, simulation and measurement results of a CMOS 12GHz Rotary Travelling Wave Voltage Controlled Oscillator. The different simulations (electrical using SPICE and electromagnetical using HFSS) are presented. These results are compared to a theoretical approach and measurements. The oscillator has been fabricated in a 0.13µm RF-CMOS technology. The phase noise at a 1MHz offset from the carrier is105dBc/Hz and the tuning range is 1.2GHz for a global consumption of 25mA.

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Cited by 15 publications
(22 citation statements)
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“…Typically, there are four types of symmetric coupled lines: (a) coplanar stripline (CPS) [3,4], (b) coupled microstrip line [9], (c) coupled coplanar waveguide (CCPW), and (d) folded coupled coplanar waveguide (FC_CPW) in which an U-shaped return ground is employed [10]. Even in a symmetric coupled line, electromagnetic interference (EMI) effect would become very serious both at high oscillation frequencies and with full swing square waveforms (which are commonly occurred at RTW VCOs).…”
Section: Proposed Shielded Coplanar Striplinementioning
confidence: 99%
“…Typically, there are four types of symmetric coupled lines: (a) coplanar stripline (CPS) [3,4], (b) coupled microstrip line [9], (c) coupled coplanar waveguide (CCPW), and (d) folded coupled coplanar waveguide (FC_CPW) in which an U-shaped return ground is employed [10]. Even in a symmetric coupled line, electromagnetic interference (EMI) effect would become very serious both at high oscillation frequencies and with full swing square waveforms (which are commonly occurred at RTW VCOs).…”
Section: Proposed Shielded Coplanar Striplinementioning
confidence: 99%
“…In contrast to LC-tank oscillators, wave-based oscillators are capable of providing an output frequency that is close to the cutoff frequency (f T ) of the device by distributing parasitic capacitances along the transmission line [17][18][19][20][21]. The characteristics of the transmission line determine the oscillation frequency [21].…”
Section: Oscillator Designmentioning
confidence: 99%
“…Most particularly, it provides a more compact design and a lower phase noise at the cost of a higher consumption [4]. The corresponding topology is proposed in figure 7.…”
Section: Rtw and Lc Qvco Designmentioning
confidence: 99%
“…One PLL is based on a rotary travelling wave (RTW) voltage controlled oscillator (VCO), with a total tuning range from 11.1 to 12.3 GHz [4]. For sake of comparison, another PLL is designed using a more traditional LC QVCO.…”
Section: Introductionmentioning
confidence: 99%