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, Table
1.
.Speciftcations
'-',.
'
5"
" I
" • .
,
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Negative. voltage ,applieli forwardbias to diodes
,6.
At attenuation levels 01; 10 dB or more, '
"
7.
Fit~
1 x 0:5 inches (WFL 90)
waveS:;..tid~',',
8.
Standard female type N
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30
20
1.6
'2.0 '
1
87318
o..8~,2.4
80, '
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2.0,
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I
+5 Vdc bias
1.
Frequency Range (GH z,)
0.8-2.4
,
)
0111:1
mic: Range (dB)
"
3~
,
' . , . '
1
Mh" InserttonLoss (dB)
<
1.5
Typical Rise Time (n8)3
40,
Typical
DecayTi~'~
(DI)S
;
30
SWR, Minimum:,Atte
auatton l . 1.5
I
SWP., Maximum Atten iatlon
t..8
"
'
Maximum'Input Power,
1
"
'~:::'~:~~~~::~:I~:s;11~ +2;O~1
0
+2~~~1O+2~~~
o
+ 2 ~ ' O - O I
0
Resistance (ohms)6 '
pu\
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8 '
8
8
R, F connector. Type' "
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I,
N
N
Weig~t{lbS~
3
5.5
a
!
,(kg)
1.4
0
2.5'
I
1.4
Dimenstons
'UU8trated
in Figure 1.
'
,\
'
2.
<4.0 dB, 4.0 to
4.Ej
GHz
\ .,
a.Driven by HP 8403A Modul \tor
, , " 4.'
210,
from 4.0
to
4;5 GHz
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- t - -.........
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-,----'
2,0
, ,4.0·
. 6.0,
12.4
. FREQUENCY· (GH1)
".01,0
',1 "j"
",f, /
I
. F;gure,'3.
Typical
Insertion Loss Curves " .
•
' I "
.........
'"
,
,
CD
3 -,-,...
~--- -'-,,----~
.•-_:..- .:-.
_."'~"--'
-, -".,...
' 0 '
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.......
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(I)
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2----,,-~
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....
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Il:
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8732B~.
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I"
•
I
'
1
dB'irripro.~ement
in insertion .loss over zero bias.
A typical plot. of the maximum values of minimum'
insertion 'loss is shown in Figure 3. Note: a.typical
, plot
fcir
the "A'" models would be the same except '
I
.
: .
.
that maximum losses are less,
. . .
,
'
' . '
, ' . : '
' . '
The attenuation increases with forward bioi cur-
rent
almost
linearly in
dB
until diode
saturation co-
curs. The attenuation, sensitivity variesfrom unit to
unit but the sensitiV',ity of. 'a 'given unit is predict-
able, Therefore, .intermediete values of' attenuation
can be derived once ,the current values, for t, low
. .and high attenuation are 'established, The range ~f
expected sensitivities is
shown
as the shaded areas
•
I _,
I
•
\ '
"
currents will', flow down the
'~ransmissibn
path be-
cause"; diode resistance camp ired to the 50-ohm
path impedance is negligible.
,
,
~
" J I\
',',.'
.\'
> + : i : , 1 ( ' ~~_ ..
Lk
,', - Figure 2. Simplified Block \?iagram
~.
'
I
of
PIN Modulator \:
,
.
".' \
I:, :
~IASING ,
•
.'
'"
' I . '
, : ! ,
:0 "
Each individual PIN Modulator has' label attached
to the 'underside of its casting body
Thi's
label has
'a,
'dc bias
currentvalue stampedjonto: it.
This
, stamped current, is' the' forward-blas current re-
quiredto
produce rated" RF
attenua
ion across the
' " , frequency band, For "A" models, the .bias current
I
•
. for
atleast
35 dB is typically
3~5
to'
milliamperea'
(about ...:.0.7 volts 'de at .the BIAS in ut), For '''B''
i ,
)models;
the bias current
for
at,:le~st8(),
dB istypi-
cally 6
to
7 milliamperes (about
"--0.1'
volts de at
. the, BIAS input).
~or
applications.
W
iere a .mini-
. ',l,nup} insertion loss is
imporl~nt,
a
re
rerse
bias of
about +5.'to
7(.vo~tsd~may
be applied,
0
the BIAS'
,
,in~ut. ,R~verse"biaSin~can,result
jn
'~s
much as a
I '
I
,
.
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