UM9605 MICROSEMI, UM9605 Datasheet - Page 12
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UM9605
Manufacturer Part Number
UM9605
Description
Manufacturer
MICROSEMI
Type
Switchr
Datasheet
1.UM9605.pdf
(16 pages)
Specifications of UM9605
Configuration
Single
Power Dissipation
500mW
Operating Temperature Classification
Military
Reverse Voltage
100V
Operating Temperature (min)
-65C
Pin Count
2
Applications Frequency Range
UHF/SHF
Lead Free Status / RoHS Status
Not Compliant
allowable power dissipation of the series mounted UM9401.
Using a gap in the line of 0.190” (4.82mm) and lead soldered
attached spacing of 0.250” (6.35mm) the power rating of the
UM9401 is 6 watts at a 25
performing a thermal resistance measurement on the circuit
mount UM9401. The relationship that derives the maximum
transmitter power, P
P
The CW power handling capacity is determined by the
Copyright 2005
Rev. 0, 2006-01-17
T
=
P
Rs
DISS
Zo
σ
2
T
σ
+
is:
1
2
o
C ambient. This was determined by
10
10
10
10
UM9601/UM9401 900 MHz MICROSTRIP ANTENNA SWITCH
3
2
1
0
MAX. TRANSMITTER POWER vs FORWAD CURRENT FOR
0
25
Microsemi
AMBIENT TEMPERATURE
50
FOR MICROSTRIP 900 MHz ANTENNNA SWITCHES
TYPICAL
maximum transmitter power curve is given and shows that this
circuit is able to handle 100 watts of transmitter power at 100
mA forward bias and totally mismatched antenna at an ambient
temperature of 60
handling increases to 400 watts under the same bias and
ambient conditions.
PIN diode antenna switch design. The UM9401 and UM9601
PIN diodes are designed for low distortion applications. The
level of distortion produced by this 900 MHz antenna switch
when operated in the transmit state (forward bias of 100 mA) is
expected to be at least 90 dB below the carrier for a 50 watt
transmitter level. In the receiver
state (zero bias) the intermodulation distortion
caused by two in-band signals at 0 dBm are estimated to be at
least 100 dB below this level
75
C
Distortion is an important consideration in the selection of a
Using resistance values for UM9401 and UM9601 the
AND MICROWAVE APPLICATIONS
where σ = maximum antenna SWR
O S
100
UM9601 – UM9608
O
125
o
C. For a perfectly match antenna the power
Zo = 50 Ohms
SWR = INFINITE
S
150
100 mA
200mA
50 mA
20 mA
10 mA
175
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