Because of the high maintenance needed to monitor and filter spammers from the RF Cafe Forums, I decided that it would
be best to just archive the pages to make all the good information posted in the past available for review. It is unfortunate
that the scumbags of the world ruin an otherwise useful venue for people wanting to exchanged useful ideas and views.
It seems that the more formal social media like Facebook pretty much dominate this kind of venue anymore anyway, so if
you would like to post something on RF Cafe's
page, please do.
Below are all of the forum threads, including all
the responses to the original posts.
Post subject: mixer selection Posted: Sat Dec 24, 2005 12:40
Who can recommend a mixer which can convert RF 5.8GHz to IF 2.4GHz
Post subject: Posted: Sat Dec 24,
2005 4:47 pm
Joined: Mon Jun 27, 2005
Mixer is not being chosen only according to the freuquency range
that in can convert, but according to additional other parameters as:
LO power level, IP3, P1dB, Return Loss... You should define these parameters
in order that one can help you choose the suitable device.
mixerPosted: Sat Dec 24, 2005 7:07 pm
Thank your reply. I look for
SMT package mixer from RFIC companies such as mini-circuits, not mixer
module. It looks not easy to find this kind of mixer which can cover
the needed frequency band. Of course, IP3 high is better. Could you
recommend any SMT type?( module type too enpensive)
Post subject: Posted: Sun Dec 25, 2005 3:38 am
Joined: Mon Jun 27, 2005 2:02 pm
Hello again newcome,
I was looking
for the type of mixer you need, it is indeed a bit non-trivial to find
such mixer. Anyway, I found couple of models from Hittite:
http://www.hittite.com/product_info/pro ... 219ms8.pdf
Hope this helps, they have several other models like you need in
Posted: Mon Dec 26, 2005 2:44 am
Of course it depends on you performance
requirments, but you can drive the IF port with a 1.7GHz @ say 10dBm.
Put 5.8GHz into the LO and take the IF from the "RF" port. The harmonic
of 1.7GHz will mix with 5.8GHz.
For example the MCA1-60 from
Minicircuits may work. Probably a few from Hittitie too.
can swap the LO and RF, there will be a trade between IIP3 and Conversion
Post subject: thanksPosted:
Mon Dec 26, 2005 1:55 pm
Thank IR and RK, HMC129 is chip type, not
LO data availabe only down 4GHz, how about
For harmonic mixing, it is novel idea, but
it only with harmonic type (anti-parallel diode) may work well.
MCA1-60 is my first choice, IF data only 2.0GHz, but may extend
to 2.5GHz . Do you have better choice? Thanks again. Happy New Year
Post subject: Posted: Mon Dec 26, 2005
I think your recommended HMC219 may work. It doesn't
offer IL below 4GH and IL down quickly from 5GHz to 4Ghz, but for LO
VSWR data, it may work.
Posted: Tue Dec 27, 2005 1:02 am
At the frequencies you've mentioned,
I've personally had the most luck with Hititte mixers. Especially the
cost versus performance factor.
subject: Posted: Tue Dec 27, 2005 10:26 am
Thanks for sharing
Post subject: Hittite
Applications GroupPosted: Tue Dec 27, 2005 12:24 pm
If you have
specific requirements, you may consider calling the Hittite Appplications
Group. They many times have data that is not shown in the data sheet
and Hittite ususally come out with 75-100 new parts a year, so there
may be Mixer that will better fit your requirements. I use Hittite parts
whenever I can just because of the great support I get from them.
Post subject: Posted: Tue Dec 27, 2005 5:16
Joined: Mon Jun 27, 2005 2:02 pm
But for the next time, please be more specific concerning the parameters
of the deivce you are looking for. I t will make it easier to help you
Hope you will find your suitable mixer!
Happy New Year!!
Post subject: Posted: Tue Dec 27, 2005 7:35 pm
Thanks all for your suggestion and advice