This new FM Power amplifier is equiped with the Mosfet transistor: the RD06HVF1.

Combined with the BFG35 driver, only 1mW from the input is needed to obtain the 5W power output.
All the impedance networks (Input & Output) have been determined by using the softwares: Mimp.EXE & Genesys.

The output power is adjustable from 0 to 5W through the Vgs command.
A PA OFF function is available by acting on the biais current of the BFG35.

The FM amplifier is protected from the ROS by switching off the driver stage.

Parameter	Value
Power Supply	12.6V
Efficiency	> 50%
Frequency Range	87.5 MHz to 108 MHz
Input power (Typ.)	0 dBm or 1mW
Output power (Typ.)	37 dBm or 5W
Gain (Min)	37 dB
Ripple Power	37.5dBm +/-0.5dB
Harmonic filtering	<-50dB (from 87.5 to 93 MHz) <-60dB (from 94 to 108 MHz)
Power adjustment	Through the Vgs control Pin 0.1W<Pout<5W(Min)
RF Power OFF	Typ=-46 dB or -8 dBm Max
Input SWR	<1.5
Forward SWR detector	Through calibrated striplines
Reverse SWR detector	Through calibrated striplines
Board Dimensions	2.5*3.5’’

 

This FM amplifier has a 38 dB gain (with driver stage) and provides 5W.
(No tune is needed to cover all the FM Band).

S11 and S21 Curves (PDF File)