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.

Block up converter Ka band

Status
Not open for further replies.

akhilpaulv

Full Member level 2
Joined
Apr 20, 2013
Messages
136
Helped
7
Reputation
14
Reaction score
7
Trophy points
1,298
Location
Thrissur, India
Activity points
2,051
Hi ,

in Ku band block up converter, The input frequency is 950 MHz to 1950 MHz . My question is the first harmonics of 950 MHz is 950*2= 1900 MHz. Which is in band of the system frequency . For Up converting if i fed the signal to the amplifier then the 1st harmonics will exists, i cannot filter out the first harmonics because it is in band of the system . Then for up covering i fed the signal to the mixer, output of the will contain the signal products such as L+IF , l+2*IF , the both signals are also in band of the system . Still there is a lot of SSPA modules are available in the frequency ? Can somebody explain how to remove all these spuries in this system??

-AK
 

Yes.
Why are you upconverting the entire 950 - 1950 MHz input band with a single LO frequency if you are so concerned about 2nd harmonics of the input?

The best you can do is use super balance mixer, with a very large LO power level, and have the input power level as low as you can tolerate for noise reasons. That way the 2nd harmonic in the mixing process will be minimized.

-67 dbc 2xIF with this mixer, for instance:
https://www.markimicrowave.com/Assets/DataSheets/MT3-0113HCQG.pdf?v=100518
 
Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top