High efficiency and suppression harmonics oscillator using front coupled tapered CMRC

作者：Hayati Mohsen^*; Lotfi Ali

来源：Microwave and Optical Technology Letters, 2012, 54(8): 1862-1866.

DOI：10.1002/mop.26943

• oscillator
• front coupled
• CMRC
• tapered cell
• terminating

This article presents a novel terminating network for microwave transistor oscillator.A front coupled tapered compact microstrip resonant cell (FCTCMRC) is inserted between the transistor and the input fundamental matching network as its terminating resonance. The fundamental frequency from the output can be connected in a positive feedback loop to the input port by tuning the dimensions of the proposed FCTCMRC. This feedback can simultaneously act as a negative feedback for the second harmonic frequency. The output at the fundamental frequency improved due to the second harmonic suppression. The proposed FCTCMRC is used to obtain as high a reflection coefficient as possible, while providing the oscillation condition with the incorporated microwave transistor. The measured results show 63.05% improvement suppression of the second harmonic using FCTCMRC in comparison with the conventional microstrip line.

• 出版日期2012-8