DESCRIPTION 

The RA18H1213G is a 18-watt RF MOSFET Amplifier 

Module for 12.5-volt radios that operate in the 1.24- to 

1.30-GHz range. 

The battery can be connected directly to the drain of the 

enhancement-mode MOSFET transistors. Without the gate 

voltage （VGG=0V）, only a small leakage current flows into the 

drain and the RF input signal attenuates up to 60 dB. The output 

power and drain current increase as the gate voltage increases.  

With a gate voltage around 4V （minimum）, output power and 

drain current increases substantially. The nominal output power 

becomes available at 4.5V （typical） and 5V （maximum）. At 

VGG=5V, the typical gate current is 1 mA. 

This module is designed for non-linear FM modulation, but may 

also be used for linear modulation by setting the drain quiescent 

current with the gate voltage  and controlling the output power 

with the input power. 

FEATURES 

• Enhancement-Mode MOSFET Transistors 

（IDD≅0  @ VDD=12.5V, VGG=0V） 

• Pout>18W, ηT>20%  @ VDD=12.5V, VGG=5V, Pin=200mW 

• Broadband Frequency Range: 1.24-1.30GHz 

• Low-Power Control Current IGG=1mA （typ） at VGG=5V 

• Module Size: 66 x 21 x 9.88 mm 

• Linear operation is possible by setting the quiescent drain 

current with the gate voltage and controlling the output power 

with the input power 

RoHS COMPLIANCE 

• RA18H1213G-101  is a RoHS compliant products. 

• RoHS compliance is indicate by the letter “G” after the Lot Marking. 

• This product include the lead in the Glass of electronic parts and the 

lead in electronic Ceramic parts. 

How ever ,it applicable to the following exceptions of RoHS Directions. 

1.Lead in the Glass of a cathode-ray tube, electronic parts, and 

fluorescent tubes. 

2.Lead in electronic Ceramic parts.