Nokia Siemens Flexi BTS base station teardown: Circuit analysis (part 2 of 2)

kaizerpowerelectronics.dk
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Circuit analysis of a Nokia Siemens Networks Flexi BTS base station. This have been in service as a 6 antenna GSM system for mobile telecommunications. GSM/EDGE, WCDMA/HSPA and LTE capable. 2×…
Circuit analysis of a Nokia Siemens Networks Flexi BTS base station. This have been in service as a 6 antenna GSM system for mobile telecommunications.

GSM/EDGE, WCDMA/HSPA and LTE capable. 2×40 Watt output power.

If you missed part 1, see it here: http://kaizerpowerelectronics.dk/teardown/nokia-siemens-flexi-bts-base-station-teardown-power-amplifier-part-1-of-2/

Above picture shows the coaxial cavity band pass filter which in popular speech is called a duplexer or diplexer. For a explanation on how this works, watch the first part of the video shown here above.

The duplexer control board and front end is managed by a ARM7 TDMI microcontroller with part number TMS470R1A288PGET. It is a 32-bit 24 MHz RISC processor.

Anaren Xinger II XC1900E hybrid couplers are used for phase split before feeding into the low noise amplifiers for signal transfer from duplexer module to power amplifier module.

The last picture could possibly…
Mads Barnkob, Electrician, Programmer, Experimenter, Amateur Scientist With Experience In Industry Automation, Programming, All Kinds Of High Voltage Generating Electronics., Administrator Of Www.Kaizerpowerelectronics.Dk, The High Voltage Community Forum Www.Highvoltageforum.Net, View All Posts Mads Barnkob
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