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mixer selection - RF Cafe Forums

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newcome

Post subject: mixer selection Posted: Sat Dec 24, 2005 12:40 am

Who can recommend a mixer which can convert RF 5.8GHz to IF 2.4GHz

Thanks

Top

IR

Post subject: Posted: Sat Dec 24, 2005 4:47 pm

Site Admin

Joined: Mon Jun 27, 2005 2:02 pm

Posts: 373

Location: Germany

Hello newcome,

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.

_________________

Best regards,

- IR

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newcome

Post subject: 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)

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IR

Post subject: Posted: Sun Dec 25, 2005 3:38 am

Site Admin

Joined: Mon Jun 27, 2005 2:02 pm

Posts: 373

Location: Germany

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 ... hmc129.pdf

http://www.hittite.com/product_info/pro ... 219ms8.pdf

Hope this helps, they have several other models like you need in their website.

www.hittite.com

Good luck!

_________________

Best regards,

- IR

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RK

Post subject: 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.

You can swap the LO and RF, there will be a trade between IIP3 and Conversion Loss.

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newcome

Post subject: thanksPosted: Mon Dec 26, 2005 1:55 pm

Thank IR and RK, HMC129 is chip type, not convenient, HMC219MS8

LO data availabe only down 4GHz, how about 3.3GHz operating?

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

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newcome

Post subject: Posted: Mon Dec 26, 2005 11:39 pm

IR,

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.

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RK

Post subject: 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.

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Guest

Post subject: Posted: Tue Dec 27, 2005 10:26 am

RK,

Thanks for sharing your experience

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Guest

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.

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IR

Post subject: Posted: Tue Dec 27, 2005 5:16 pm

Site Admin

Joined: Mon Jun 27, 2005 2:02 pm

Posts: 373

Location: Germany

Hello newcome,

You welcome! 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!!

_________________

Best regards,

- IR

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newcome

Post subject: Posted: Tue Dec 27, 2005 7:35 pm

Thanks all for your suggestion and advice

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