Categories
Statistics
Flag Counter
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
Valid HTML 4.01 Transitional Creative Commons Lizenzvertrag
rss
เราจะทำแบบวิศวกรผู้ยิ่งใหญ่
We love the King
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




10 MHz CW
S11 - better 10 dB up to 2 GHz
10 MHz CW
S22 - better 10 dB up to 2 GHz


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 ?

 
t1 = 6709 d

t2 = 222 ms

★ ★ ★  Copyright © 2006 - 2024 by changpuak.ch  ★ ★ ★

Impressum