A DDS-PLL hybrid based fast settling wideband frequency synthesizer for frequency hopping radios

Vishnu, R.

doi:10.1016/j.procs.2017.09.160

Cited by 2 publications

(2 citation statements)

References 9 publications

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“…Alternatively, operating solely in integer-N mode eliminates fractional spurs, but a swept reference frequency must be implemented. However, traditional DDS circuits employed for this method struggle with heat dissipation and require complex, power-hungry digital signal processing (DSP) systems [15,16].…”

Section: Introductionmentioning

confidence: 99%

“…Recent research has explored this concept, focusing on significant improvements in phase noise (achieving exceptional results of −110 dBc/Hz at 100 kHz offset [10]) and fractional spur suppression (keeping them below −70 dBc [15]). However, to our knowledge, no existing work has addressed true wideband sweep operations applicable across diverse applications while simultaneously considering all of these challenges.…”

Section: Introductionmentioning

confidence: 99%

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Wideband Low Phase-Noise Signal Generation Using Coaxial Resonator in Cascaded Phase Locked Loop

Blatnik,

Batagelj

2024

Electronics

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The generation of high-quality wideband frequency sweeps presents a significant challenge, particularly in modern telecommunication, radar, and measurement systems where miniaturization is paramount. While phase-locked loops (PLLs) have become the dominant technique for signal generation, their application in broadband sweeps necessitates fractional-N operation. This, in turn, degrades phase noise and introduces unwanted spurs. This paper proposes a novel approach for broadband signal generation. By cascading two PLLs and utilizing a coaxial resonator, we achieve a high-performance oscillator that operates without the excessive fractional spurs, maintaining their level below −80 dBc across the entire frequency band. The prototype demonstrates non-degraded phase noise performance, reaching −102 dBc/Hz at 100 kHz offset and −121 dBc/Hz at 1 MHz offset for signals at 10 GHz. Despite significant frequency jumps, our design achieves lock times below 41 µs. These results, supported by theoretical analysis, validate the proposed method’s effectiveness in generating low-noise broadband frequency sweeps, ideal for local oscillator applications.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Wideband Low Phase-Noise Signal Generation Using Coaxial Resonator in Cascaded Phase Locked Loop

Blatnik,

Batagelj

2024

Electronics

View full text Add to dashboard Cite

show abstract

Wide-Band Low Phase-Noise Signal Generation Using Coaxial Resonator in Cascaded Phase Locked Loop

Blatnik,

Batagelj

2024

Preprint

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The generation of high-quality wideband frequency sweeps presents a significant challenge, particularly in modern telecommunication, radar, and measurement systems where miniaturization is paramount. While phase-locked loops (PLLs) have become the dominant technique for signal generation, their application in broadband sweeps necessitates fractional-N operation. This, in turn, degrades phase noise and introduces unwanted spurs. This paper proposes a novel approach for broadband signal generation. By cascading two PLLs and utilizing a coaxial resonator, we achieve a high-performance oscillator that operates without the excessive fractional spurs, maintaining their level below -80 dBc across the entire frequency band. The prototype demonstrates non-degraded phase noise performance, reaching -102 dBc/Hz at 100 kHz offset and -121 dBc/Hz at 1 MHz offset for signal at 10 GHz. Despite significant frequency jumps, our design achieves lock times below 41 µs. These results, supported by theoretical analysis, validate the proposed method's effectiveness in generating low-noise broadband frequency sweeps, ideal for local oscillator applications.

show abstract

A DDS-PLL hybrid based fast settling wideband frequency synthesizer for frequency hopping radios

Cited by 2 publications

References 9 publications

Wideband Low Phase-Noise Signal Generation Using Coaxial Resonator in Cascaded Phase Locked Loop

Wideband Low Phase-Noise Signal Generation Using Coaxial Resonator in Cascaded Phase Locked Loop

Wide-Band Low Phase-Noise Signal Generation Using Coaxial Resonator in Cascaded Phase Locked Loop

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