"JOURNAL OF RADIO ELECTRONICS" (Zhurnal Radioelektroniki ISSN 1684-1719, N 11, 2017

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Noise-like signal oscillations in microstrip active antennas integrated with a FET transistor


 E. O. Yunevich , V. I. Kalinin , V. D. Kotov , V. E. Lyubchenko , S. V. Marichek , D. E. Radchenko , S. A. Telegin

Kotel'nikov Institute of Radio-engineering and Electronics of RAS, Fryazino Branch, Vvedensky Sq.1, Fryazino Moscow region 141120, Russia 


The paper is received on October 22, 2017


Abstract. Microwave solid-state oscillators of noise-like signals are of the great interest for wireless telecommunication systems, imaging systems and electronic warfare. For instance, there is a method of direct-chaotic information transfer (transmission by chaotic pulses) in the ultra-wideband wireless personal communication standards. In this paper, the possibility of microwave noise-like signal generation is investigated. A microstrip log-periodic antenna integrated with a field-effect transistor (antenna-oscillator - AO) is used. In the oscillator construction, one antenna petal is excited, and the positive feedback is realized by means of the microwave electromagnetic field induction in another petal. As an active element, NE3514S02 field-effect transistor with 13.5 dB gain at 12 GHz was chosen. The conditions of the chaotic oscillation emergence are determined experimentally. It is found that the main factor resulting in broadening of the signal frequency band is the distance between the plane of the antenna and the reflecting screen (thickness of the substrate) and the value of the current in the drain-source circuit of the transistor. Chaotic oscillations in the antenna-oscillator with substrate thickness ranged from 0.015λ to 0.025λ (λ is the wavelength in the dielectric) and drain-source circuit current located in the saturation region of the current-voltage characteristic is experimentally studied. The chaotic signal with a bandwidth up to 3 GHz in the frequency range from 6 to 20 GHz is obtained.

Keywords: microwave, self-oscillator, chaos, log-periodic antenna, field-effect transistor.


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For citation:

E. O. Yunevich , V. I. Kalinin , V. D. Kotov , V. E. Lyubchenko , S. V. Marichek , D. E. Radchenko , S. A. Telegin. Noise-like signal oscillations in microstrip active antennas integrated with a FET transistor. Zhurnal Radioelektroniki - Journal of Radio Electronics, 2017, No. 11. Available at http://jre.cplire.ru/jre/nov17/2/text.pdf. (In Russian)