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Abstract

This paper presents a low phase noise positive feedback type Push-Push oscillator employing a balanced bandpass filter (BPF). The BPF consists of an array of split-ring resonators and functions as a frequency selective element in the common feedback loop of the oscillator. Two positive feedback oscillators are coupled to create the 180-degree differential signals required for the implementation of a Push-Push oscillator. The proposed oscillator is analyzed and fabricated. The measured results show that the oscillator works at 15.15 GHz of the second harmonic frequency with an output power of -5.6 dBm. Furthermore, the suppression of fundamental frequency signal is 25.2 dB. Excellent phase noise performance of -100.37 dBc/Hz at 100-kHz offset frequency and -127.13 dBc/Hz at 1-MHz offset frequency is obtained.

1. Pavio, A. M. and M. A. Smith, "A 20-40-GHz push-push dielectric resonator oscillator," IEEE Transactions on Microwave Theory and Techniques, Vol. 33, No. 12, 1346-1349, Dec. 1985.

2. Choi, Jaewon and Chulhun Seo, "Microstrip square open-loop multiple split-ring resonator for low-phase-noise VCO," IEEE Transactions on Microwave Theory and Techniques, Vol. 56, No. 12, 3245-3252, Dec. 2008.

3. Zhang, Hao, Wei Kang, and Wen Wu, "Configuration for realizing a push-push parallel-feedback oscillator through a differential bandpass filter," IEEE Access, Vol. 6, 28514-28519, 2018.

4. Wang, Xiang and Xiao-Wei Zhu, "An X-band push-push oscillator with parallel feedback configuration designed by microstrip balanced bandpass filter," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 29, No. 5, e21663, 2019.

5. Yang, Xian-Long, Xiao-Wei Zhu, and Xiang Wang, "An X-band low phase noise parallel-feedback oscillator based on SIW dual-mode filtering power divider," IEEE Transactions on Circuits and Systems II: Express Briefs, Vol. 71, No. 1, 61-65, Jan. 2024.

6. Choi, Jonghoon, Morteza Nick, and Amir Mortazawi, "Low phase-noise planar oscillators employing elliptic-response bandpass filters," IEEE Transactions on Microwave Theory and Techniques, Vol. 57, No. 8, 1959-1965, Aug. 2009.

7. Lima, Elton Nascimento, Takayuki Tanaka, and Ichihiko Toyoda, "A novel low phase noise push-push oscillator employing dual-feedback sub-oscillators," Progress In Electromagnetics Research M, Vol. 75, 141-148, 2018.

8. Tanaka, Takayuki, Hirotaka Umezaki, and Ichihiko Toyoda, "Stabilizing output performance of positive feedback type push-push oscillator array by injection locking technology," 2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM), 1-2, Montreal, QC, Canada, Jul. 2016.

9. Georgiadis, Apostolos, Selva Via, Ana Collado, and Fermin Mira, "Push-push oscillator design based on a substrate integrated waveguide (SIW) resonator," 2009 European Microwave Conference (EuMC), 1231-1234, Rome, Italy, 2009.

10. Su, Ping, Shiwei Zhao, and Zongxi Tang, "Ku-band push-push VCO based on substrate integrated waveguide resonator," Microwave Journal, Vol. 56, No. 5, 166-176, 2013.

11. Chen, Zhe, Wei Hong, Jixin Chen, and Linsheng Li, "Design of a push-push and push-pull oscillator based on SIW/SICL technique," IEEE Microwave and Wireless Components Letters, Vol. 24, No. 6, 397-399, 2014.

12. Li, Zhipeng, Yongzhi Liu, and Jingfu Bao, "A K-band push-push oscillator employing differential transmission line loaded with SIW cavity operated in TM110 mode," Microwave and Optical Technology Letters, Vol. 58, No. 5, 1217-1221, 2016.

13. Xiao, Hai, T. Tanaka, and M. Aikawa, "A low phase noise Ku band push-push oscillator using slot ring resonator," 2004 IEEE MTT-S International Microwave Symposium Digest (IEEE Cat. No.04CH37535), Vol. 3, 1333-1336, TX, United States, Jun. 2004.

14. Trofimowicz, D., P. Kant, E. Lia, and J. J. Michalski, "Push-push oscillator based on packaged space-qualified components operating at 11.8 GHz," 2022 52nd European Microwave Conference (EuMC), 139-142, Milan, Italy, 2022.

Dr. Elton Nascimento Lima

Dr. Takayuki Tanaka

Dr. Ichihiko Toyoda