Total Harmonic Power of Arbitrarily Switched Nonuniform Period Time-Modulated Arrays

Kanbaz, Ihsan; Yeşilyurt, Uğur; Kuzu, Suleyman; Aksoy, Ertuğrul

doi:10.1109/lawp.2019.2957528

Cited by 11 publications

(8 citation statements)

References 15 publications

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“…overall performance of the array. According to this definition, P % loss of the considered array is written as follows [41]:…”

Section: B Discussion On Power Consumptionmentioning

confidence: 99%

On the Sideband Harmonics in Pulsed Frequency Diverse Arrays

Kanbaz,

Yesilyurt,

Arican

et al. 2023

IEEE Access

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Pulsed frequency diverse arrays (FDAs) have recently garnered significant research attention in radar and sensing applications due to their range-dependent radiation properties. However, the timedependent nature of radiation can limit the benefits of FDAs. While recent methods have been proposed to mitigate this limitation and enhance the functionality of FDAs, there is an urgent need to characterize better their radiated power profile and specifically to address the substantial power losses in the sideband harmonics. In this paper, we bridge this gap in the literature by presenting a new closed-form expression for the sideband radiated power (SRP). Additionally, we explore practical limitations outlined in the existing literature that pertain to achieving time-independent radiation concerning SRP consumption. Finally, our theoretical analysis is supported by numerical examples. A noteworthy insight from our work is that treating pulsed FDA systems as time-independent may lead to unreliable conclusions, underscoring the importance of addressing the SRP issue in future research.INDEX TERMS Frequency diverse array, harmonic analysis, radiated power, range dependent electric field.

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“…overall performance of the array. According to this definition, P % loss of the considered array is written as follows [41]:…”

Section: B Discussion On Power Consumptionmentioning

confidence: 99%

On the Sideband Harmonics in Pulsed Frequency Diverse Arrays

Kanbaz,

Yesilyurt,

Arican

et al. 2023

IEEE Access

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“…This is a well-known phenomenon deeply studied in another family of smart radiating architectures, the time-modulated arrays [18], [19], whose radiating peculiarity exactly relies on the multifrequency generation, that has been successfully exploited also for WPT purposes [20], [21]. The loss of power because of the presence of uncontrolled sideband harmonics has also been studied for this family of arrays [22], [23].…”

Section: Introductionmentioning

confidence: 99%

Exploitation of Harmonic Generation in Time-Controlled Frequency-Diverse Arrays for WPT

Tiberi,

Fazzini,

Costanzo

et al. 2024

IEEE Trans. Antennas Propagat.

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“…Recently, there have been several studies using the time‐modulated array (TMA) strategy for dot‐shaped beamforming. These studies take advantage of the single harmonic beamforming 25–28 and nonuniform radio frequency (RF) switching features of TMA 29–31 . In Maneiro‐Catoira et al, 32 FDA employs switched TMAs instead of a variable phase shifter (VPS) and nonuniform Kaiser window‐based frequency offsets.…”

Section: Introductionmentioning

confidence: 99%

“…These studies take advantage of the single harmonic beamforming [25][26][27][28] and nonuniform radio frequency (RF) switching features of TMA. [29][30][31] In Maneiro-Catoira et al, 32 FDA employs switched TMAs instead of a variable phase shifter (VPS) and nonuniform Kaiser window-based frequency offsets. An FDA construct is proposed that uses TMA with inexpensive single-pole double-throw switches for steering two dotshaped beampatterns.…”

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confidence: 99%

Dot‐shaped transmit beamforming with nonuniform time‐modulated concentric circular frequency diverse array

Yesilyurt,

Arican,

Aksoy

2023

Micro & Optical Tech Letters

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In this study, a true three‐dimensional dot‐shaped beamforming, in which the transmitted energy in a spatial region (azimuth, elevation, and range) is focused is performed with the nonuniform time‐modulated concentric circular frequency diverse array (NUTM‐CCFDA). The CCFDA structure with a radially outward increasing frequency offset between the rings has structural symmetry that provides the advantage of full scanning in the azimuth plane without any significant change in beam shape. Moreover, the NUTM, where the antenna elements are simply excited with a different modulation frequency in each ring, uses the in‐phase/quadrature channel modulator to realize a single sideband. The proposed NUTM‐CCFDA structure exhibits efficient beam scanning with the switch time‐on instant without using variable phase shifters to steer the dot‐shaped beam. Thus, NUTM‐CCFDA not only realizes a true dot‐shaped beam with better angle resolution on the first harmonic components but also has a simpler configuration than the conventional frequency diverse arrays with sophisticated variable frequency/phase shifters.

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Total Harmonic Power of Arbitrarily Switched Nonuniform Period Time-Modulated Arrays

Cited by 11 publications

References 15 publications

On the Sideband Harmonics in Pulsed Frequency Diverse Arrays

On the Sideband Harmonics in Pulsed Frequency Diverse Arrays

Exploitation of Harmonic Generation in Time-Controlled Frequency-Diverse Arrays for WPT

Dot‐shaped transmit beamforming with nonuniform time‐modulated concentric circular frequency diverse array

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