Autor: Tamošiūnas, V. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Resistive Sensor for Short High-Power Microwave Pulse Measurement in Millimeter Wave Range
Autorzy:: Tamošiūnas, V.
Kancleris, Ž
Dagys, M.
Simniškis, R.
Agee, F.
Powiązania:: https://bibliotekanauki.pl/articles/1177568.pdf
Data publikacji:: 2005-02
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 72.20.Ht
72.30.+q
85.30.De
Opis:: We report on the numerical investigation of the resistive sensor for the 78-118 GHz range. A three-dimensional finite-difference time-domain method was applied to simulate the wave propagation within a waveguide segment with the semiconductor sensor attached to a wider wall of the wave-guide. The electric field distribution, voltage standing-wave ratio and the average electric field dependences on frequency have been determined for several sets of dimensions and specific resistances of the sample. It is demonstrated that a proper selection of the dimensions and specific resistance of the sample can compensate the waveguide dispersion and the decrease of the electron heating effect with frequency. Therefore, a nearly constant sensitivity of the sensor can be obtained for the entire frequency range.
Źródło:: Acta Physica Polonica A; 2005, 107, 2; 420-424
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Experimental Investigation of High Pulse Power Microwave Resistive Sensor with Flat Frequency Response
Autorzy:: Kancleris, Ž.
Simniškis, R.
Dagys, M.
Tamošiūnas, V.
Ragulis, P.
Powiązania:: https://bibliotekanauki.pl/articles/1807940.pdf
Data publikacji:: 2009-06
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 07.57.Kp
72.20.Ht
85.30.De
Opis:: Two types of resistive sensors with flat frequency response for microwave pulse power measurements in X-band rectangular waveguide WR-90 up to 100 kW were developed and experimentally investigated. The first type of the sensors demonstrates higher sensitivity and larger output signal, while the second one exhibits better linearity of the output signal. The experimental investigations revealed the sensitivity variation within ± 10% in 8.2-12.2 GHz frequency band.
Źródło:: Acta Physica Polonica A; 2009, 115, 6; 1122-1124
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Finite-Difference Time-Domain Simulation of Mid- and Far-Infrared Quantum Cascade Lasers
Autorzy:: Tamošiūnas, V.
Kancleris, Ž.
Dagys, M.
Simniškis, R.
Tamošsiūnienė, M.
Valušis, G.
Strasser, G.
Unterrainer, K.
Powiązania:: https://bibliotekanauki.pl/articles/2041682.pdf
Data publikacji:: 2005-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 72.30.+q
78.66.-w
85.30.De
Opis:: We present simulations of mid- and far-infrared quantum cascade lasers operating with/without external magnetic field. Maxwell-Bloch solver based on the finite-difference time-domain method was used in our investigation. Reduction of the far-infrared quantum cascade laser emission intensity is associated with increased optical losses in highly doped layers when magnetic field is changed from 4.2 T to 6.2 T. A simulated emission spectrum of mid-infrared disc-shaped quantum cascade laser with 60μm radius is consistent with the experimentally observed irregular spacing between quantum cascade laser emission lines.
Źródło:: Acta Physica Polonica A; 2005, 107, 1; 179-183
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Broad Band THz Sensing by 2DEG Bow-Tie-Type Diodes
Autorzy:: Valušis, G.
Seliuta, D.
Tamošiūnas, V.
Širmulis, E.
Balakauskas, S.
Gradauskas, J.
Sužiedėlis, A.
Ašmontas, S.
Anbinderis, T.
Narkūnas, A.
Papsujeva, I.
Lisauskas, A.
Roskos, H. G.
Köhler, K.
Powiązania:: https://bibliotekanauki.pl/articles/2041684.pdf
Data publikacji:: 2005-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 73.50.-h
85.30.De
72.30.+q
Opis:: We suggest a novel approach to detect broad band, 0.078-2.52 THz, electromagnetic radiation at room temperature using an asymmetrically-shaped bow-tie diode based on a modulation-doped GaAs/AlGaAs structure. We show that the voltage sensitivity in the range from 0.078 THz up to 0.8 THz has a plateau and its value is within 0.3-0.5 V/W. We consider the bow-tie diode design to increase the sensitivity of the device.
Źródło:: Acta Physica Polonica A; 2005, 107, 1; 184-187
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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