Categories
Statistics
Flag Counter
Since 08.08.2014
Counts only, if "DNT = disabled".

216.73.217.6
216.73.217.6
Info
Valid HTML 4.01 Transitional Creative Commons Lizenzvertrag
rss
เราจะทำแบบวิศวกรผู้ยิ่งใหญ่
We love the King
7. July 2026
YOUR OPINION     •••
average: 9.000,   n: 1

Rating




When using this form, your ip is stored in order to avoid multiple voting on the same website. That's it.
BGA2817.php    6286 Bytes    04-03-2025 19:11:20


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.




 
t1 = 7299 d

t2 = 291 ms

★ ★ ★  Copyright © 2006 - 2026 by changpuak.ch  ★ ★ ★

Impressum