DIODI SCHOTTKY ( HOT - CARRIER ) Pag 1 - rf

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Confronto fra vari RF detector commerciali
ed il diodo schottky DDC2353
uscita in c.c. da ogni tipo di detector
RF
input
level
DDC2353
dBm
( @ 10 GHz )
zero bias
schottky
Telonic
8554
low barrier
schottky
( @ 1 GHz )
Suhner
1001.01A
low barrier
schottky
( @ 1 GHz )
HP 8472A
point
contact diode
#1 -- # 2
( @ 10 GHz )
HP 8470B
low barrier
schottky
Alfred 1001
point
contact diode
( @ 10 GHz )
( @ 10 GHz )
- 30
1.5 mV
0.84 mV
0.41 mV
0.98 mV 0.85
0.7 mV
0.8 mV
-25
4.5 mV
2.1 mV
1.7 mV
2.7 mV 2.4
2.1 mV
2.2 mV
-20
14 mV
8.1 mV
5.5 mV
8 mV 7.3
6.3 mV
6.4 mV
-15
38 mV
19 mV
16.4 mV
22 mV 20
18 mV
18 mV
-10
85 mV
59 mV
43 mV
54 mV 50
4.8 mV
46 mV
-5
180 mV
115 mV
103 mV
120 mV 113
110 mV
106 mV
-0
360 mV
280 mV
226 mV
246 mV 234
233 mV
223 mV
+5
698 mV
503 mV
460 mV
480 mV 460
470 mV
440 mV
NB la sensibilità del diodo DDC2353, a giudicare dalla tabella , sembrerebbe essere molto superiore anche rispetto a
RF detector molto rinomati e costosi, questo è dovuto anche al fatto che i detector commerciali sono tutti dotati di rete
di matching sul diodo che comporta una perdita di alcuni dB ( circa 3 dB ) , rispetto al nostro diodo invece montato
senza rete di matching. Ne consegue che la sensibilità reale dei diodi è all'incirca simile fra tutti i vari tipi.
Comparison with several commercial RF detectors
and the Schottky diode DDC2353
dc output from each type of detectors
dBm
( @ 10 GHz )
Telonic
8554
low barrier
schottky
( @ 1 GHz )
- 30
-25
-20
-15
-10
-5
-0
+5
1.5 mV
4.5 mV
14 mV
38 mV
85 mV
180 mV
360 mV
698 mV
0.84 mV
2.1 mV
8.1 mV
19 mV
59 mV
115 mV
280 mV
503 mV
RF
input
level
DDC2353
zero bias
schottky
Suhner
1001.01A
low barrier
schottky
( @ 1 GHz )
0.41 mV
1.7 mV
5.5 mV
16.4 mV
43 mV
103 mV
226 mV
460 mV
HP 8472A
point
contact diode
#1 -- # 2
( @ 10 GHz )
0.98
2.7
8
22
54
120
246
480
mV
mV
mV
mV
mV
mV
mV
mV
0.85
2.4
7.3
20
50
113
234
460
HP 8470B
low barrier
schottky
Alfred 1001
point
contact diode
( @ 10 GHz )
( @ 10 GHz )
0.7 mV
2.1 mV
6.3 mV
18 mV
4.8 mV
110 mV
233 mV
470 mV
0.8 mV
2.2 mV
6.4 mV
18 mV
46 mV
106 mV
223 mV
440 mV
Note: the sensitivity of the DDC2353 diode, judging from the table, would seem to be much higher than very famous
and expensive RF detectors, this is due to the fact that commercial detectors are all equipped with a matching network
on the diode that causes a loss of about 3 dB compared to our diode that has been tested without a matching network
instead. The result is that the real sensitivity of the diodes is quite similar among the various types.
R.F. elettronica di Rota F.
www.rfmicrowave.it
[email protected]
tel ++39.02.99 48 75 15
fax ++39.02.99 48 92 76