Wideband low phase-noise signal generation using coaxial resonator in cascaded phase locked loop

Blatnik, Aljaž (avtor), Batagelj, Boštjan (avtor)

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 ▫$\mu▫$s. These results, supported by theoretical analysis, validate the proposed methods effectiveness in generating low-noise broadband frequency sweeps, ideal for local oscillator applications

• Jezik: Angleški jezik
• Ključne besede: PLL, phase-noise, DDS, coaxial resonator, ultra-wideband, spur-free
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FE - Fakulteta za elektrotehniko
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2024
• Št. strani: 16 str.
• Številčenje: Vol. 13, iss. 10, [article no.] 1934
• PID: 20.500.12556/RUL-158203
• UDK: 621.39
• ISSN pri članku: 2079-9292
• DOI: 10.3390/electronics13101934
• COBISS.SI-ID: 196609283
• Datum objave v RUL: 29.05.2024

Gradivo je del revije

• Naslov: Electronics
• Skrajšan naslov: Electronics
• Založnik: MDPI
• ISSN: 2079-9292
• COBISS.SI-ID: 523068953

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: fazno-sklenjena zanka, fazni šum, DDS, koaksialni resonator, ultra-širokopasovno