Abstract. Microwave oscillator,
based on the one-dimentional microstrip log-periodic antenna array, integrated
with field-effect transistors and substrate integrated waveguide (SIW), is
proposed and studied. The waveguide consists of the dielectric substrate bounded
with two parallel metal plates and two rows of interlayer metalized cylindrical
holes. Substrate integrated waveguide technology has some advantages, such as
low loss, high Q-factor of cavities, good shielding properties, and the ability
to integrate all components on the same substrate. The oscillator is based on the
rectangular substrate integrated cavity. The cavity was excited by four active
antenna-oscillators. Field effect transistor NE350184C with Ga =
13.5 dB at 20 GHz was used as an active device. The substrate
integrated waveguide with sizes corresponding to the estimated frequency was
used to transmit the energy from the cavity. The end of the waveguide had
a wedge form and was inserted into the hollow metal waveguide. The
fundamental frequency of generation was ~ 12 GHz. Mutual synchronization of
all four antenna-oscillators was obtained despite the difference of the
fundamental frequencies. Measured total output power was 1.5 mW, that exceeded
the summarized power of the single antenna-oscillators.
Key words: microwaves, oscillator,
substrate integrated waveguide, log-periodic antenna, field-effect transistor.
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For citation:
V. E. Lyubchenko, E. O. Yunevich,
V. I. Kalinin, V. D. Kotov, D. E. Radchenko, S. A. Telegin.
Active antennas integrated with substrate integrated waveguide
for power combining.
Zhurnal Radioelektroniki - Journal of Radio Electronics,
2017, No. 4. Available at http://jre.cplire.ru/jre/apr17/4/text.pdf.
(In Russian)