A DRO-based X-band injection-locked amplifier without input non-reciprocal elements

Calandra, E.F.; Lupo, Daniele; Puccio, Lorenzo

doi:10.1109/ecctd.2009.5274994

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…In particular, the results here presented refer to a TILO configuration which does not make use of nonreciprocal elements at input port, while maintaining a reasonable value of input port return losses (which, in case of TILOs, can easily turn out to be return gains, indeed). While a discussion of this peculiar circuit structure and its operating characteristics is not relevant here (it was presented elsewhere [9]) it is a good real world example of application of the design method developed, and can be adopted to concisely illustrate its practical use.…”

Section: Design Considerations and Application Examplementioning

confidence: 98%

Approach to the design of transmission-type injection-locked microwave oscillators through behavioral block modeling

Calandra

Lupo

2010

2010 XIth International Workshop on Symbolic and Numerical Methods, Modeling and Applications to Circuit Design (SM2ACD)

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In this work, an attempt is made toward the development of a systematic design method for the performancedriven dimensioning of the various elements comprising the structure of modern transistor-based microwave injectionlocked oscillators with transmission-type topologies (TILOs). The proposed approach is based on the use of appropriate diakoptics of the various circuit blocks into a matched environment, and their behavioral modeling in the fundamentalfrequency dynamical complex envelope domain with the help of standard circuit and E.M. simulation CAD tools. This will permit, in the end, to obtain closed-form expressions for the main TILO performances in terms of the design parameters, thus permitting their optimization as a function of system-level specifications. The practical validity of the method developed was tested by designing and building a single transistor 10.75GHz core-TILO with a wide locking bandwidth (>4MHz) at the low nominal input power level targeted (-20dBm).

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Section: Design Considerations and Application Examplementioning

confidence: 98%

Approach to the design of transmission-type injection-locked microwave oscillators through behavioral block modeling

Calandra

Lupo

2010

2010 XIth International Workshop on Symbolic and Numerical Methods, Modeling and Applications to Circuit Design (SM2ACD)

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“…NJECTION LOCKING [1][2][3] has multiple applications, such as phase noise reduction [2][3], high-gain amplification [4][5][6], compact and low-cost phase and frequency modulation [7][8][9] and phase shifting [10][11][12]. Injection-locked oscillators exhibit solution curves with intricate geometries when traced versus the input frequency s  , injection current s I and other parameters.…”

Section: Introductionmentioning

confidence: 99%

Efficient Simulation of Solution Curves and Bifurcation Loci in Injection-Locked Oscillators

Cos

Suárez

2015

IEEE Trans. Microwave Theory Techn.

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A new method is presented for the two-level harmonic-balance analysis of multivalued synchronized solution curves in injection-locked oscillators. The method is based on the extraction of a nonlinear admittance function, which describes the circuit response from the input source terminals. It does not require any optimization or parameter switching procedures, this constituting a significant advantage compared with previous analysis techniques. With additional mathematical conditions, it enables a straightforward determination of the turning point and Hopf bifurcation loci that delimit the stable injection-locked operation bands. The codimension two bifurcation point at which the turning point and Hopf bifurcation loci merge is analyzed in detail, as well as the saddle-connection locus. As it is shown, a second intersection of the saddle-connection locus with the turning point locus acts as a boundary between synchronization points and points associated with jumps and hysteresis. The likely observation of chaotic solutions in the neighborhood of the saddle-connection locus is discussed too. The techniques have been validated by application to several injection-locked oscillators, obtaining good agreement with the experimental results.

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Influence of active device nonlinearities on the determination of Adler's injection-locking Q-factor

Calandra

Caruso

Lupo

2011

2011 20th European Conference on Circuit Theory and Design (ECCTD)

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A DRO-based X-band injection-locked amplifier without input non-reciprocal elements

Cited by 3 publications

References 7 publications

Approach to the design of transmission-type injection-locked microwave oscillators through behavioral block modeling

Approach to the design of transmission-type injection-locked microwave oscillators through behavioral block modeling

Efficient Simulation of Solution Curves and Bifurcation Loci in Injection-Locked Oscillators

Influence of active device nonlinearities on the determination of Adler's injection-locking Q-factor

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