Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

How to get flat broadband LNA design with narrow gain differemce

Status
Not open for further replies.
H

hari_preetha

Full Member level 2
Joined
Jun 30, 2014
Messages
127
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,296
Activity points
2,258
I have designed LNA from 13 -16 GHz. I would like to get flat broad band LNA from 13-16 GHz of gain variation ± 0.5 dB. I tried lot and couldn't get flat band from 13-16 GHz. What should be done to get flat gain variation of ± 0.5 dB?
Please find attachment of LNA ckt and result
 

Attachments

  • 13_16_GHz_BroadBand LNA_Design.jpg
    13_16_GHz_BroadBand LNA_Design.jpg
    397 KB · Views: 82
  • 13_16_GHz_BroadBand LNA_Results.jpg
    13_16_GHz_BroadBand LNA_Results.jpg
    379.7 KB · Views: 77

Applying a Series and/or Parallel Feedback may maintain the Flatness by suffering Gp.( Preferred Method )
Or..
Using a Cascode Configuration is very common method to achieve Wide-band Response ( Optimization easier that Cascade Config.)
 
BigBoss said:
Applying a Series and/or Parallel Feedback may maintain the Flatness by suffering Gp.( Preferred Method )
Or..
Using a Cascode Configuration is very common method to achieve Wide-band Response ( Optimization easier that Cascade Config.)
Click to expand...

Here same ckt is used as ckt I used i in posting #1. They achieved flat top gain over frequency range of 7- 15 GHz (schematic ckt and plot of gain is attached). What should be done for my ckt to achieve gain flat broad band of variation + or - 0.5 dB variation over frequency range of 13 - 16 GHz, which component I should vary for getting flat for desired range. Please advice it.
 

Attachments

  • 7_15 GHz Broad Band LNA_Schematic.jpg
    7_15 GHz Broad Band LNA_Schematic.jpg
    35 KB · Views: 75
  • 7_15 GHz Broad Band LNA_Gain_Plot.jpg
    7_15 GHz Broad Band LNA_Gain_Plot.jpg
    179.9 KB · Views: 71

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top