Analysis and characterization of PLL-based retrodirective array

Fusco, Vincent; Soo, Chee Binn; Buchanan, Neil

doi:10.1109/tmtt.2004.840620

Cited by 33 publications

(17 citation statements)

References 14 publications

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“…The conjugation error, which was obtained by subtracting the input and output phases is also shown on this graph. The reduction in conjugation error is related to the new improved architecture used, producing an average phase conjugation error of , as compared to in the circuit presented in [7] and [8]. The primary reason for the improvement achieved, by experimental observation, is most likely to be associated with reduced phase noise and overall stability of the circuit.…”

Section: Resultsmentioning

confidence: 97%

“…Previously, we have demonstrated phase conjugation by means of a novel phase locked loop (PLL) circuit. These methodologies required the use of RF mixing products at frequencies higher than that of the RF [7], [8]. The phase conjugating PLL topology reported here processes the signal at a much lower reference frequency and uses the PLL circuit to produce the resultant microwave signal.…”

Section: Introductionmentioning

confidence: 99%

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Mirror Image Sawtooth Phase Conjugator Circuit for Retrodirective Antenna Applications

Buchanan

Fusco

2007

Antennas Wirel. Propag. Lett.

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A new type of phase conjugating circuit which uses the properties of a linear sawtooth wave and an inverting sample and hold (S&H) circuit in order to produce a phase conjugated output signal is reported. Since the circuit performs phase conjugate action at a low frequency the need for circuit components operating at twice the incoming RF frequency, a requisite for all previous single mixer based circuit solutions is removed. The circuit has been experimentally verified for operation at 960 MHz. Phase conjugation errors of better than 15 , less than the 24 needed for unimpaired 4-element retrodirective array operation, were obtained from the configuration.Index Terms-Phase conjugation, phase locked loop (PLL), retrodirective antenna array.

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Section: Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Mirror Image Sawtooth Phase Conjugator Circuit for Retrodirective Antenna Applications

Buchanan

Fusco

2007

Antennas Wirel. Propag. Lett.

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“…The core element of an RDA that enables the tracking functionality is the phase conjugator unit [22]. Among many forms of phase conjugator units, active analogue types are attractive due to their low power consumption, real-time response, and frequency reconfiguration flexibility [23], [24].…”

Section: B Retrodirective Arrays (Rdas)mentioning

confidence: 99%

Secure Wireless Key Establishment Using Retrodirective Array

Ding

Zhang

Fusco

2016

2016 IEEE Globecom Workshops (GC Wkshps)

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“…This field is mixed [17] across the terminals of the GPCL element at with the pump signal generated by the local oscillator and applied at frequency so that the induced dipole moment for a point-like element at (or, in general, a phase conjugated voltage across the terminals of the PCL antenna element) can be written in the form (6) where is the resulting phase conjugated dipole antenna element amplitude and is the real-valued phase of the pump voltage across the terminals of the PCL element at . High-quality phase conjugating elements that enable the operation given by (6) can be realized using phase conjugating phased-locked loop architecture which is described in detail in [16]- [19], [29]. It is important to note at this stage that phase conjugation of the incoming wave at the GPCL surface leads to negative refraction of the transmitted phase conjugated wave [16], [17] as can be immediately seen from (6).…”

Section: B Partial Plane Wave Phase Conjugation At Gpclmentioning

confidence: 99%

Electromagnetic Focusing and Imaging in Stratified Media Using Gradient Phase Profiled Conjugating Lens

Malyuskin

Fusco

2014

IEEE Trans. Antennas Propagat.

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High-resolution imaging of a dipole source in stratified medium based on negative refraction is presented in this paper. Compensation of the material parameter contrast at the stratified media interface is achieved using a gradient phase profiled conjugating lens (GPCL). It is shown both analytically and numerically that the phase gradient applied across the GPCL positioned at the interface of vertically stratified media enables a high-quality image of a dipole source in a mirror symmetric position with respect to the lens plane. The analytical closed form expression of the phase gradient function is derived using Huygens-Kirchhoff principle. The result is applicable to media with arbitrary stratification and material parameters, including lossy materials. The mechanism for formation of the dipole image in the stratified medium and aberration due to the dielectric contrast at the interface, particularly electromagnetic loss, is discussed in detail. The efficacy of gradient phase and amplitude aberration compensations mechanisms available through the GPCL is articulated. The results of the study are of importance in a wide range of imaging problems in stratified media for medical, civil, and military applications.

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Analysis and characterization of PLL-based retrodirective array

Cited by 33 publications

References 14 publications

Mirror Image Sawtooth Phase Conjugator Circuit for Retrodirective Antenna Applications

Mirror Image Sawtooth Phase Conjugator Circuit for Retrodirective Antenna Applications

Secure Wireless Key Establishment Using Retrodirective Array

Electromagnetic Focusing and Imaging in Stratified Media Using Gradient Phase Profiled Conjugating Lens

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