Low phase noise oscillator stabilised by high quality factor AFSIW resonators

Zhiqiang Liu; Jinping Xu; Wenbo Wang

Low phase noise oscillator stabilised by high quality factor AFSIW resonators

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Author(s): Zhiqiang Liu¹ ; Jinping Xu¹ ; Wenbo Wang¹
- Affiliations: 1: State Key Laboratory of Millimetre Waves , Southeast University , Nanjing 210096 , People's Republic of China
Source: Volume 54, Issue 19, 20 September 2018, p. 1128 – 1130
DOI: 10.1049/el.2018.5663 , Print ISSN 0013-5194, Online ISSN 1350-911X

Received 04/06/2018, Published 09/08/2018

A novel X-band low phase noise oscillator is proposed by taking advantage of the enhanced quality factor of air-filled substrate integrated waveguide (AFSIW) resonators. A pair of AFSIW resonators is embedded in a feedback loop, which forms a high-selectivity bandpass filter, to greatly reduce the phase noise of a heterojunction FET oscillator. A prototype is designed, fabricated and measured. At an output signal of 9.85 GHz, the phase noise is −146.8 dBc/Hz and the figure of merit is −210.6 dBc/Hz at 1 MHz offset frequency. An improvement of about 10 dB in phase noise performance is obtained compared with published substrate integrated waveguide resonator-based oscillators.

References

1. 1)
  - 5. Xu, J., Cui, Y.J., Xu, Z.B., et al: ‘Low phase noise oscillator based on complementary split-ring resonators loaded quarter-mode circular SIW cavity’, Electron. Lett., 2017, 53, (14), pp. 933–935 (doi: 10.1049/el.2017.1829).
2. 2)
  - 6. Duong, T.V., Hong, W., Tran, V.H., et al: ‘An alternative technique to minimize the phase noise of X-band oscillators using improved group delay SIW filters’, Microw. Wirel. Compon. Lett., 2017, 27, (2), pp. 153–155 (doi: 10.1109/LMWC.2017.2648120).
3. 3)
  - 2. Choi, J., Nick, M., Mortazawi, A.: ‘Low phase-noise planar oscillators employing elliptic-response bandpass filters’, Trans. Microw. Theory Tech., 2009, 57, (8), pp. 1959–1965 (doi: 10.1109/TMTT.2009.2025424).
4. 4)
  - 8. Schorer, J., Bornemann, J., Rosenberg, U.: ‘Mode-matching design of substrate mounted waveguide (SMW) components’, Trans. Microw. Theory Tech., 2016, 64, (8), pp. 2401–2408.
5. 5)
  - 2. Ha, S.J., Lee, Y.D., Kim, Y.H., Choi, J.J., Hong, U.S.: ‘Dielectric resonator oscillator with balanced low noise amplifier’, Electron. Lett., 2002, 38, (24), pp. 1542–1544 (doi: 10.1049/el:20020993).
6. 6)
  - 3. Tseng, C.H., Chang, C.L.: ‘Design of low phase-noise microwave oscillator and wideband VCO based on microstrip combline bandpass filters’, Trans. Microw. Theory Tech., 2012, 60, (10), pp. 3151–3160 (doi: 10.1109/TMTT.2012.2210441).
7. 7)
  - 7. Parment, F., Ghiotto, A., Vuong, T.P., et al: ‘Low-loss air-filled substrate integrated waveguide (SIW) band-pass filter with inductive posts’. 45rd IEEE European Microwave Conf. (EuMC), Paris, September 2015, pp. 761–764.
8. 8)
  - 5. Chen, Z., Hong, W., Chen, J., Zhou, J.Y.: ‘Design of high-Q tunable SIW resonator and its application to low phase noise VCO’, IEEE Microw. Wireless Compon. Lett., 2013, 23, (1), pp. 43–45 (doi: 10.1109/LMWC.2012.2234088).
9. 9)
  - 9. Parment, F., Ghiotto, A., Vuong, T.P., et al: ‘Ka-band compact and high-performance bandpass filter based on multilayer air-filled SIW’, Electron. Lett., 2017, 53, (7), pp. 486–488 (doi: 10.1049/el.2016.4399).

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Low phase noise oscillator stabilised by high quality factor AFSIW resonators

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