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

Help in receiver front end design_which BPF should I use

Status
Not open for further replies.
vivek1214

vivek1214

Full Member level 1
Joined
Jun 18, 2007
Messages
99
Helped
11
Reputation
22
Reaction score
1
Trophy points
1,288
Activity points
1,824
front-end bpf

hello everyone,
I am designing low IF receiver front end in ADS,I have a confusion that which Band Pass Filter should i use,butterworth ,chebyshev or raised cosine and for 90 degree phase shift should I use phase shifer or time delay component.
Thanks in advance.
vivek
 

receiver + bpf + lna + blick diagram

it will depend , on ur application , and the location of the filter , try to send a block diagram , showing the location of the filter

Khouly
 

why bpf infront of lna

hello khouly,
I have attached the block diagram,could you pls see it and suggest me about the filters and phase shifters.
 

frontend bpf

the BPF will depend on ur requirment , sharp response , very flat gain response . so it could be butterworth or cheby

to get very flat gain , use butter worth

about the phase shifter , u can use poly phase circuits

khouly
 

Hi

I do not now your application.

Maybe you should also consider a bandpass filter before your LNA. I know it will increase you NF, but having a strong interfernce could saturate your LNA and put it well into saturation.

Regards
 

in front of LNA(between LNA and ANT) we need to use low loss filters,and LC and microstrip filters have high loss ,so we should use other types like as HELICAL filters or CAVITY filter ,... these filters is mechanical and not electronic in construction ,but I can not find any good design information on them,plz send info for us if u have good links,ebook names,Is there any other types of low loss filters?
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top