RxW 345 GHz Gunn

Frequency source 321-381 GHz
SN: 2006 066

Data Sheet

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     Gigatronics            Gunn Oscilator      Frequency triple   Output
    (f 10-12.5 GHz)
   [(Gunn-450MHz)/N]        U_Gunn = 9,0V         321-381 GHz
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    x9    x10    x11     f[GHz]    F       B      U[V]   I[mA]   f[GHz] P[W]
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  11.84  10.66  *9.69     107     0.28    0.41    1.0     -4.2   *321     450
  11.95  10.76  *9.78     108     0.34    0.37    1.4     -3.9    324     850
  12.06  10.86  *9.87     109     0.46    0.35    1.0     -4.4    327     700
  12.17  10.96  *9.96     110     0.56    0.24    0.7     -3.9    330     450
  12.28  11.06 *10.05     111     0.65    0.25    1.5     -3.2    333     400
  12.39  11.16  10.14     112     0.75    0.24    0.5     -3.5    336     800
 *12.51  11.26  10.23     113     0.88    0.20    1.5     -3.5    339     700
 *12.62  11.36  10.32     114     0.98    0.18    1.0     -4.0    342     800
 *12.73  11.46  10.41     115     1.09    1.50    1.0     -5.3    345    1200
 *12.84  11.56  10.50     116     1.17    1.76    1.7     -5.1    348     800
 *12.95  11.66  10.60     117     1.25    0.66    1.5     -4.2    351     800
 *13.06  11.76  10.69     118     1.31    1.59    1.6     -4.6    354     900
 *13.17  11.86  10.78     119     1.37    1.62    1.2     -4.1    357     700
 *13.28  11.96  10.87     120     1.43    0.34    1.0     -4.1    360     650
 *13.39  12.06  10.96     121     1.48    1.07    1.0     -4.0    363     500
 *13.51  12.16  11.05     122     1.53    1.59    0.3     -3.8    366     250
 *13.62  12.26  11.14     123     1.57    1.48   -0.6     -4.0    369      50
 *13.73  12.36  11.23     124     1.60    1.39    0.8     -5.0    372     650
 *13.84  12.46  11.32     125     1.63    1.26    0.8     -5.0    375     600
 *13.95 *12.56  11.41     126     1.69    1.26    1.0     -4.3   *378     500
 *14.06 *12.66  11.50     127     1.77    0.82    1.2     -5.0   *381     550
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 *: do not use!
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        For diagnostic purposes: diode DC characteristics

         I [mA]   -10     -100   -1000   -3000
         U [V]   -0.77   -0.85   -0.93   -0.99

• For RxW a variable diode attenuator was added and the multiplier was self-biased with a 7k5 resistor. At f 345GHz (max output) self bias-voltage ~ 3.0 V.
• Turn on:
  • It is important to avoid exessive currents through the multiplier diode. In order to avoid these currents, the multiplier always has to be set at a voltage of 2 V prior to switching on the R.F.
• Frequency change:
  • Frequency changes can bring jumps in the input power which could result in exessive currents througt the mulstiplier diode. In the changing process, the bias voltage of the multiplier always has to be kept at 2 volts.
• Turn off:
  • Switch of the R.F. frequency before switching of the multiplier bias voltage.
• Operational safe limits for the multiplier:
  • Bias voltage between -0.6....5 V
  • No positive currents allowed
  • Negative currents between 0...-6mA

Gunn power curves:

  Output                               Output   
F_usb     P                          F_lsb     P 
[GHz]   [µW]                         [GHz]   [µW]
 326     450                          316     450
 329     850                          319     850
 332     700                          322     700
 335     450                          325     450
 338     400                          328     400
 341     800                          331     800
 344     700                          334     700
 347     800                          337     800
 350    1200                          340    1200
 353     800                          343     800
 356     800                          346     800
 359     900                          349     900
 362     700                          352     700
 365     650                          355     650
 368     500                          358     500
 371     250                          361     250
 374      50                          364      50
 377     650                          367     650
 380     600                          370     600
 383     500                          373     500
 386     550                          376     550