SUBMILLIMETER BACKWARD-WAVE OSCILLATOR PROGRAM …submillimeter backward-wave oscillator program n....
26
SUBMILLIMETER BACKWARD-WAVE OSCILLATOR PROGRAM N. Stankiewicz (LeRC) L.R. Barnett (Analex Corp.) JA Dayton, Jr (LeRC)
Transcript of SUBMILLIMETER BACKWARD-WAVE OSCILLATOR PROGRAM …submillimeter backward-wave oscillator program n....
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Second International Symposium on Space Terahertz Technology Page 501
1
10 15 20 25 30Distance above circuit, Fra
Fig. 2. Calculated beam current densities beforeand after circuit interception (scraped).
Fig
. 7.
The
mul
tiel
ectr
ode
lens
com
pens
ated
gun
for
the
fir
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t w
ith
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Equip
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ELECTRON PENCIL BEAMSCRAPED INTO A
SHEET BEAM
INTER-DIGITALBWO CIRCUIT
FABRICATED ONDIAMOND SUBSTRATE
Second International Symposium on Space Terahertz Technology Page 503
CONFIGURATION OF ELECTRON BEAM WITH RESPECT TO BWO CIRCUIT
Fig. 1. Configuration of the electron beamwith respect to the BWO circuit.
11.1
111
111
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UM
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9
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. 14. D
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backw
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o m
ake c
ircuit
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220 gr
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0.01 . 0
200
180
Second International Symposium on Space Terahertz Technology Page 505
Voltage, kVFig. 19. Theoretical and experimental starting current for the aluminum
metalized crystalline quartz circuit shown in Fig. 14.
2802.0
-41). Relative Power
1.5 -4"" Frequency 260
ta4
240 C.:C.a 1.0
Voltage, kVFig. 20. Tuning curve and power output curve for the aluminum
metalized crystalline quartz circuit shown in Fig. 14.
LIN
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um
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the
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JULY
13,
198
9
265 GHz
Design Point
\ Linear DispersionTheoretical Curve Et
----- 127,3 GHz
1
300
150
100
250
200
Page 508 Second International Symposium on Space Terahertz Technology
1 2 3
Beam Voltage, kV
Fig 25. Quartz substrate BWO frequency versus beam voltage.
-,,,und International Symposium on Space Te ahertz Technology Page 509
-200.0 1.0 2.0 3.0 4.0 5.0
Beam Voltage,kV
Fig. 26. Quartz sub3trateB0ou put.
11. 2
°
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indow
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or
the d
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ment.
311.5 GHz
Page 572 Second International Symposium on Space Terahertz Technology
400
Tuning Band = 77.7%
Center Freq. = 224 GHz
Linear DispersionTheoretical Curve Fit
1003 4
Beam Voltage, kV
Fig. 29. Diamond substrate BWO tuning. Experimentalfrequency versus beam voltage.
6
Rela
tive P
ow
er,
(1
11
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Page 518 Second International Symposium on Space Terahertz Technology
Second International Symposium on Space Terahertz Technology Page 519
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