"JOURNAL OF RADIO ELECTRONICS" (Zhurnal Radioelektroniki ISSN 1684-1719, N 11, 2018

contents of issue      DOI  10.30898/1684-1719.2018.11.15     full text in Russian (pdf)  

Resonant properties of the substrate integrated waveguide antenna-oscillator

 

S. A. Telegin, V. E. Lyubchenko, D. E. Radchenko, E. O. Yunevich

Fryazino Branch of Kotelnikov Institute of Radioengineering and Electronics of Russian Academy of Sciences,
Vvedensky Sq.1, Fryazino Moscow region 141190, Russia

 

The paper is received on October 17, 2018

 

Abstract. Microwave oscillator design based on the log-periodic microstrip antenna integrated with a field-effect transistor and a waveguide embedded in a dielectric substrate is considered. Computer simulation was performed using the finite difference method in the time domain. S-parameters were determined in the 11-13 GHz frequency range for different sizes of the resonator, and resonator modes in this frequency range were also calculated. Simulation results have demonstrated that in the case when one of the lower resonator modes coincides with the eigen frequency of the antenna, in this frequency range the transistor is unbalanced with the antenna, and the oscillator feedback decreases, that makes oscillations to be impossible. At the same time, for the second harmonic, when the lowest resonator modes cannot be excited, changing the antenna position in resonator allows the oscillator to be balanced with the waveguide and provides efficient radiation output through the narrowed part of the waveguide.

Key words: microwave, oscillator, substrate integrated waveguide, log-periodic antenna, field-effect transistor, resonator modes.

References

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For citation:
S. A. Telegin, V. E. Lyubchenko, D. E. Radchenko, E. O. Yunevich. Resonant properties of the substrate integrated waveguide antenna-oscillator. Zhurnal Radioelektroniki - Journal of Radio Electronics. 2018. No. 11. Available at http://jre.cplire.ru/jre/nov18/15/text.pdf

DOI  10.30898/1684-1719.2018.11.15