Hi, I'm experimenting in the RF field, for that, I would like to implement a radio control system at 27 MHz, but my system communication is to short around 2 meters (6.56 ft), and I want at least 30 m (98.40 ft), so, I need one RF amplifier, but when I try to make that with 2N2222A or BC547B, the gain of the amplifier is very low, in some case less than the unit, my questions are:
What Kind of transistor I need to use for this frequency, in the case that the mentioned transistor was ok for this frequency what are the considerations for the design(could you give me an example).
Researching about RF amplifier I found for the desing of the RF amplifier I need the Y-parameters, but when I looking for diferent RF transistors, in some case the datasheet contains the Y-Parameter for determinated Q-point at certain frequency, in all case this parameters is above 27 MHz, how can I found the Y-Parameters for the intereseted Q point @ 27 MHZ?
I attach my design for the amplifier, in simulation the gain at 1 KHz and 27 MHz are almost the same, but physically the gain at 27 MHz is to poor around 2*Vi.
I hope you can give me some tips for the design.
For all thank you.
Hector.
What Kind of transistor I need to use for this frequency, in the case that the mentioned transistor was ok for this frequency what are the considerations for the design(could you give me an example).
Researching about RF amplifier I found for the desing of the RF amplifier I need the Y-parameters, but when I looking for diferent RF transistors, in some case the datasheet contains the Y-Parameter for determinated Q-point at certain frequency, in all case this parameters is above 27 MHz, how can I found the Y-Parameters for the intereseted Q point @ 27 MHZ?
I attach my design for the amplifier, in simulation the gain at 1 KHz and 27 MHz are almost the same, but physically the gain at 27 MHz is to poor around 2*Vi.
I hope you can give me some tips for the design.
For all thank you.
Hector.