Download UHF Power Module IW2792

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PAG. 1
UHF Power Module
Frequency range
430 - 500 MHz Pout 3W
input +10dBm (10mW)
400 - 530 MHz Pout 2.4W
input +13dBm (20mW)
Test : +5V, bias -3.5V
Test : +5V, bias -3.5V
Power supply
+5V current max. 1.3A
Bias voltage
-3.5V for normal operation and 150mA current
-3.2V and 250mA current see note
IW2792 is a small UHF power module capable of delivery about 3W within the optimal frequency range from
430 to 500 MHz, it can be also suitable from 400 to 530 MHz with a little output power reduction (it has been
tested in our laboratory with 2.4 - 2.5W output power).
The power supply is +5V with max current of 1.3A, for the bias it is necessary to adjust the right voltage which
is -3.5V with about 150mA of current.
To operate in SSB, AM or pulse it is suggested to increase a little the current to reach about 250mA and -3.2V
in order to improve the linearity, the bias circuit is made by a ICL7660 negative voltage converter preceded by
a +5V regulator, the current of the negative bias is only 1mA. As a general rule an increase of negative voltage
will reduce the bias current and a decrease of negative voltage will increase the bias current.
The schematic diagram is suggested to obtain the optimal operation, the RF circuit is uncritical and without
any self-oscillation, no particular matching is necessary for the best result, moreover the
dc-block input/output capacitors are already included inside the power module. An appropriate heat sink is
necessary for the correct thermal dissipation.
R.F. elettronica di Rota Fanco
Via Dante, 5
20030 Senago (MI)
Tel.: +39 (0)2 99487515
Fax: +39 (0)2 99489276
E-mail: [email protected]