Results 111 to 120 of about 206 (155)

Oscillators of mm-range on GaAs Gunn diodes

13th International Crimean Conference Microwave and Telecommunication Technology, 2003. CriMiCo 2003., 2003
Design of broadband GaAs Gunn diode oscillators in the mm-range is considered. Power, frequency and temperature characteristics of the offered oscillators are experimentally and theoretically investigated.
A.V. Dyadchenko, A.A. Mishnyov, E.D. Prokhorov, N.E. Polyansky   +3 more
openaire   +1 more source

Stabilized biharmonic Gunn-diode oscillator

2022
A biharmonic 3-cm-band Gunn-diode oscillator with second harmonic frequency stabilization by an external high-Q resonator is described and test results are given. The oscillator has an output power of 320 mW for a temperature coefficient of frequency of 5·10-7/°C in the temperature range from -50 to +50°C.
Buzykin, V. T., Noskov, V. Ya., Tumanov, B. N.   +2 more
openaire   +1 more source

Phase stabilization of nanosecond microwave oscillations in Gunn-diode-based oscillators

Technical Physics, 2015
The “intrusion” of the phase of a Gunn-diode nanosecond microwave oscillator by applying a modulating voltage pulse is numerically simulated. The dependences of the microwave oscillation phase on the spread of the pulse rise time and modulating pulse amplitude are revealed.
V. Yu. Konev, A. I. Klimov, O. B. Koval’chuk, V. P. Gubanov, V. Yu. Kozhevnikov, A. V. Kozyrev   +5 more
openaire   +1 more source

A periodic planar Gunn diode power combining oscillator

IEEE Transactions on Microwave Theory and Techniques, 1990
Several planar periodic power combining oscillators containing two to six Gunn diodes operating in the X-band region are discussed. The maximum power combining efficiency, 126.7% was obtained from the three-diode oscillator. The frequency dependence of all the power combiners on the bias voltage variation seemed to be independent of the number of ...
A. Mortazawi, T. Itoh
openaire   +1 more source

Self-modulated Gunn diode self-oscillating mixer

IEEE NTC,Conference Proceedings Microwave Systems Conference, 2002
The use of low frequency oscillations that occur in the bias circuit of a Gunn oscillator for Doppler signal detection in a Gunn self-oscillating mixer is described. This approach increases sensitivity, improves performance of a Gunn self-oscillating mixer and simplifies the scheme of Doppler signal processing.
J. Krasavin, H. Hinrikus
openaire   +1 more source

Temperature feature analysis of autodyne oscillators on gunn diode

2008 18th International Crimean Conference - Microwave & Telecommunication Technology, 2008
Theoretical analysis fulfilled for temperature impact upon autodyne oscillators shows that this factor causes the self-oscillation condition changing first of all: namely, auto-bias, amplitude and frequency of oscillations, as well as output power. Temperature curves of the autodyne potential, its output levels of the signal and noise are determined by
S. D. Votoropin, V. Ya. Noskov, S. M. Smolskiy   +2 more
openaire   +1 more source

A 94-GHz overmoded waveguide oscillator with Gunn diodes

2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157), 2002
Spatial power combining of Gunn diodes with an efficiency of more than 80% has been demonstrated at W-band using an overmoded waveguide resonator with an array of TE/sub 10/ mode waveguides. This resonator makes use of selective coupling between an mxn TE/sub 10/ mode in the waveguide Gunn diode array and the TE/sub m0/ mode in the overmoded waveguide ...
null Jongsuck Bae, M. Fujita, K. Mizuno
openaire   +1 more source

Magnetic frequency tuning of the microwave Gunn diode oscillator

Radioelectronics and Communications Systems, 2009
It has been found experimentally that the oscillation frequency of a Gunn diode placed in the low-dimensional resonance system “metal pin-closely set short-circuiter” can be effectively controlled by magnetic field applied in the normal direction with respect to the waveguide wide wall.
Gorbatov, Sergey S., Semenov, A. A., Usanov, Dmitry A., Sorokin, A. N., Kvasko, Vladimir Yu.   +4 more
openaire   +2 more sources

Amplification of microwave oscillations on harmonics of the Gunn diode conductivity

Instruments and Experimental Techniques, 2013
The results of studying microwave amplifiers on the second harmonic of the negative conductivity of Gunn diodes operating in the centimeter waveband are presented.
Yu. I. Alekseev, A. V. Dem’yanenko
openaire   +1 more source

Low-phase-noise Gunn diode oscillator design

IEEE Transactions on Microwave Theory and Techniques, 1988
Low-phase-noise Gunn diode oscillators with an operating frequency of 35 GHz and an output power of 100 mW are designed, fabricated, and tested. The phase noise is -132 dBc/Hz to -125 dBc/Hz at 100-kHz offset from the center frequency. This low phase noise is obtained by closely coupling the stabilizing transmission cavity resonator and the Gunn-diode ...
R.A. Strangeway, T.K. Ishii, J.S. Hyde
openaire   +1 more source