Since 08.08.2014 Counts only, if "DNT = disabled".
Your IP is 3.14.250.187 ec2-3-14-250-187.us-east-2.c
Info
เราจะทำแบบวิศวกรผู้ยิ่งใหญ่
24. November 2024
YOU RATED THIS ...
avg = 0.0 , n = 0
BGA2817.php 6286 Bytes 10-06-2024 10:15:33
VHF Amplifier with the BGA 2817 (NXP)
Yet another MMIC wideband amplifier - DC to 2.2 GHz.
The assembled prototype
✈ The Design
The design was mainly inspired by the BGA 2817 datasheet. It uses only two capacitors
for input / output ac-coupling.
There is no inductor necessary to supply the dc !
As it runs on 3.3 Volts (20 mA), a 78L33 (SO-8) voltage regulator was added to allow for
higher supply voltages. (7...30 V). Having such a low supply also suggests, that the output
power is not that high. The datasheet specifies 5 dBm at 2150 MHz. We measured 7 dBm at 100 MHz.
If you want more, maybe a 5 Volt regulator (ABSOLUTE MAXIMUM RATINGS) will do the trick.
Even so the datasheet says: "General purpose low noise wideband amplifier for frequencies between
DC and 2.2 GHz", we would not call a NF of 3.9 dB as "low noise", but as a second stage
it mayst work fine. Keep in mind that the maximum input power should not go above
Pin <= -20 dBm (unless you want to create harmonics :-)
✈ Downloads
✈ Performance - Matching : S11, S22
The matching is better than 10 dB up to more than 2 GHz. This makes this amplifier a beautiful candidate
to be used to terminate a mixer very broadband-ly !
✈ Performance - Isolation : S12
Isolation is better than 30 dB up to more than 6 GHz. Maybe some antistatic foam may improve that figure
even more. The datasheet calls up number of 39 dB up to 2150 MHz.
✈ Performance - Gain : S21
The Gain is 25 dB up to 2 GHz. It then drops slightly to 13 dB at 4 GHz. This mayst be caused by the used
FR-4 pcb material. If you want to go higher, Rogers™ is your friend.
✈ Share your thoughts
The webmaster does not read these comments regularely. Urgent questions should be send via email.
Ads or links to completely uncorrelated things will be removed.
Your Browser says that you allow tracking. Mayst we suggest that you check that DNT thing ?