Indirect optically injection-locked oscillator for millimeter-wave communication system

Wang, Xu; Gomes, Nathan J.; Gomez-Rojas, L.; Davies, P.A.; Wake, D.

doi:10.1109/22.899018

Cited by 13 publications

(6 citation statements)

References 16 publications

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“…The prospect of using a synchronous oscillator to lock a signal at a subharmonic frequency has been studied widely in the literature [1][2][3][4][5]. A subharmonic injection-locked technique has also 792 F. PLESSAS, A. TSITOURAS AND G. KALIVAS been proposed as a particular technique for optical synchronization of the remoted local oscillator at microwave and millimeter-wave applications [6,7]. Recently, a V-band CMOS injection-locked oscillator using fundamental harmonic injection was proposed in [8].…”

Section: Introductionmentioning

confidence: 99%

Phase noise characterization of subharmonic injection locked oscillators

Plessas

Τσίτουρας

Kalivas

2010

Circuit Theory & Apps

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SUMMARYIn this work we present a detailed study of the phase noise of subharmonic injection locked oscillators (s-ILOs). A new simple and efficient model has been presented for accurately predicting the phase noise of a microwave s-ILO. The validity of the analytical technique is verified with measurement results obtained from a 5-GHz fully differential Colpitts-based s-ILO. The results showed that a phase noise improvement of 12 dB at 1 kHz offset frequency compared to the free-running case can be achieved, whereas the power consumption is 21 mW.

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Section: Introductionmentioning

confidence: 99%

Phase noise characterization of subharmonic injection locked oscillators

Plessas

Τσίτουρας

Kalivas

2010

Circuit Theory & Apps

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“…Although there is considerable work during the last years in fundamental-frequency injection-locking PLLs (ILPLLs) [1][2][3][4][5][6][7][8][9], subharmonic-injection PLLs have only recently attracted the attention of researchers.…”

Section: Introductionmentioning

confidence: 99%

A subharmonically injected phase‐locked loop for 5‐GHz applications

Plessas

Kalivas

2006

Micro & Optical Tech Letters

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bands. The measured peak gains are better than 4.55 and 5.24 dBi in 2.4 and 5.2 GHz operation bands, respectively. CONCLUSIONA printed T-shaped slot antenna is proposed for the dual-band WLAN operation. By using the T-shaped slot, two resonant modes are excited where one resonant mode is controlled to operate at 2.4-GHz-band and the other is controlled to operate at 5.2-GHzband. Good agreement between the measured and simulated results verifies the design of the proposed antenna. The measured impedance bandwidths are 2.18 -2.85 GHz and 4.96 -5.5 GHz for VSWR Յ2 and are sufficient for the two bands of WLAN standard. The measured gains are better than 4.55 and 5.Novel dual-broadband rectangular-slot antenna for 2.4/5.2-GHz wireless communication, Microwave Opt Technol Lett 46 (2005), 197-200. ABSTRACT: This work introduces a modified subharmonic injectionlocked phase-locked loop (S-ILPLL) that feeds the phase comparator with half the frequency of the voltage-controlled oscillator by employinga divider in the loop feedback path. The main objective is to address the phase noise improvement of subharmonic ILPLLs, especially for the 5-GHz band. Theoretical analysis and computer calculations demonstrate an improved performance for phase noise and power consumption. An experimental prototype was implemented to verify the validity of the proposed approach. Measurement results are in good agreement with computer calculations, thus the proposed S-ILPLL can constitute an attractive design approach for 5-GHz WLAN synthesizers.Figure 6 Measured peak gain of proposed antenna. (a) 2.4-GHz-band (2400 -2484 MHz) (b) 5.2-GHz-band (5150 -5350 MHz)

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“…A millimetre-wave transmission-type optically injection-locked oscillator [7] was used to investigate the dependence of the oscillator loaded Q on the injection signal power.…”

Section: Dependence Of Oscillator Loaded Q On the Injection Signal Powermentioning

confidence: 99%

“…Transmission type indirect optically injection-locked oscillators potentially offer higher locking bandwidth than other types of optically injection-locked oscillator [7]. An optimum photodiode insertion point design is required by this type of oscillator for a 3 wide locking bandwidth.…”

Section: Introductionmentioning

confidence: 99%

“…Further, equations for such electrically injection-locked oscillators have been used for predicting the locking bandwidth of optically injection-locked oscillators [4]- [5]. In recent years, optically injection-locked oscillators have attracted great interest because of their possible use in future optical communication systems, in applications ranging from microwave and millimetre-wave signal reception, phased array systems and optoelectronic clock recovery [7]- [12]. Locking bandwidth is one of the major design parameters in these types of injection-locked oscillator.…”

Section: Introductionmentioning

confidence: 99%

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