Do you happen to know anything about the design of the power amplifier itself? A user on youtube suggested it is a Doherty amplifier, but I think its a little more complex than that.
Since you have all the modules, the system module, the RF outputs and the antennas you'll just need 48V 100A PSU to power the whole thing and try running your own femtocell
A user on youtube suggested it is a Doherty amplifier, but I think its a little more complex than that.
I can't find a datasheet for the BLD6G22L-150BN/2, but the BLD6G22L-50 datasheet is easy to find. My guess is the -150BN/2 is basically two -50 parts integrated into a single package, for better thermal matching.
The BLD6G22L is a Dougherty amp, specially for the 2110MHz to 2170MHz WCDMA and LTE band. The main signal path is easy to see in the picture, but the "peak" path isn't. The main path is simply through a driver stage at the bottom, then the power is split between four parallel paths in the main power amp stage. Finally, the four power outputs are combined.
I can't find a datasheet for the BLD6G22L-150BN/2, but the BLD6G22L-50 datasheet is easy to find. My guess is the -150BN/2 is basically two -50 parts integrated into a single package, for better thermal matching.
The BLD6G22L is a Dougherty amp, specially for the 2110MHz to 2170MHz WCDMA and LTE band. The main signal path is easy to see in the picture, but the "peak" path isn't. The main path is simply through a driver stage at the bottom, then the power is split between four parallel paths in the main power amp stage. Finally, the four power outputs are combined.
Last night I started filming for a look inside the doherty amplifier ICs, that will be the next video going online
I think each of the integrated doherty amplifiers are used for carrier in upper and peak in the lower. Look at the track width entering the upper transistor, its wider than the lower, so there is a difference there. The combining outputs also suggest that the lower is the peak amplifier as it has a quarterwave length filter from the longer tracks.
I can't find a datasheet for the BLD6G22L-150BN/2, but the BLD6G22L-50 datasheet is easy to find. My guess is the -150BN/2 is basically two -50 parts integrated into a single package, for better thermal matching.
The BLD6G22L is a Dougherty amp, specially for the 2110MHz to 2170MHz WCDMA and LTE band. The main signal path is easy to see in the picture, but the "peak" path isn't. The main path is simply through a driver stage at the bottom, then the power is split between four parallel paths in the main power amp stage. Finally, the four power outputs are combined.
Agree, also the clearence, via-stitching and trackwidth
proper RF constructions are a work of art.
..but.. there is too much solder and residue left on the transistors
Great with even more details pointed out, so the quarter wave length trace from decoupling capacitor to the transistor, is this to prevent noise to ground?