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odyseus
Joined: 01 Jan 1970
Posts: 130
Helped: 2
Location: Cold & Wet Europe!
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 22 Jun 2004 0:10 Latest RF tutorial uploaded |
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Hi all,
It's been a while but I've managed to upload another tutorial to
www.rfic.co.uk
This one is satellite communications and is under the systems & devices section...
Differential LNA almost finished - just need to add some equations for linearity.
Bye for now
Ody 
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odyseus
Joined: 01 Jan 1970
Posts: 130
Helped: 2
Location: Cold & Wet Europe!
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| 17 Jul 2004 13:19 Re: Latest RF tutorial uploaded |
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Ok All,
I've updated and expanded the MOS C-S LNA.
I have now completed and uploaded a Differential MOS LNA Tutorial - that describes Diff LNA design for low noise and linearity calculations.
Bye for now Ody 
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Uky
Joined: 03 Sep 2004
Posts: 76
Helped: 12
Location: Swedish West Coast
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| 21 Oct 2004 7:58 Re: Latest RF tutorial uploaded |
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Odyseus,
FYI:
I opened the PIN diode attenuator tutorial. Page 7 of 14 is blank.
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odyseus
Joined: 01 Jan 1970
Posts: 130
Helped: 2
Location: Cold & Wet Europe!
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| 17 Nov 2004 15:28 Re: Latest RF tutorial uploaded |
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Hi All,
I've at last completed the MOS Gilbert Cell Mixer Tutorial and can be found under the RFIC Circuits menu Normal web address www.rfic.co.uk..
I'm currently working on a MOS L-C oscillator followed by a Colpitts..
Bye for now
Ody
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odyseus
Joined: 01 Jan 1970
Posts: 130
Helped: 2
Location: Cold & Wet Europe!
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| 06 Feb 2005 14:52 Re: Latest RF tutorial uploaded |
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Hi All,
I've completed another tutorial on basic RF equipment design. This is based on a lecture given by a now retired engineer, i've added some more info plus some ADS examples.
It can be found under the Systems & Devices section.
The L-C oscillator tutorial is nearly done at last!
Cheers
Ody
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bhgaurav
Joined: 29 Jul 2004
Posts: 32
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| 08 Mar 2005 8:43 Latest RF tutorial uploaded |
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| boy your tutorials are amazing. can you have something up for interconnects
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kent616
Joined: 09 Mar 2005
Posts: 19
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| 15 Mar 2005 4:31 Re: Latest RF tutorial uploaded |
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| odyseus, ur website is great...but can u have some thing about broadband LNA i need it very much.....i search a lot about 5.8 GHz broadband LNA (3 stage) , but do not know how to start?? Pls help....
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bouchy
Joined: 11 Jul 2004
Posts: 108
Helped: 1
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| 13 Apr 2005 2:44 Re: Latest RF tutorial uploaded |
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What a terrific web site, excellent job. The web site is great as it is but if you can include some informations about (PA) module layout that will be superb.
Wonderful job,
Bouchy
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linlin
Joined: 05 May 2005
Posts: 8
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| 06 May 2005 10:35 Re: Latest RF tutorial uploaded |
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hei, wonderful job~
by the way, I would like some material about ring oscillator(900M), where can I find it? 3ks a lot~~
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Willem
Joined: 17 May 2005
Posts: 43
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| 17 May 2005 13:59 Re: Latest RF tutorial uploaded |
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Hi
your site is really great, I use a lot of it in my studies.
Is it possible to put something up on dielectric resonator oscillators? In particular the design of them. I would really appreciate that.
thanks for a very informative site.
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ahmad_abdulghany
Joined: 12 Apr 2005
Posts: 1329
Helped: 182
Location: Cairo, Egypt
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| 03 Jul 2005 23:31 Re: Latest RF tutorial uploaded |
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I want to know if there is another tutorials starting from relativly low level .. how can i get them ??
thanks alot
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odyseus
Joined: 01 Jan 1970
Posts: 130
Helped: 2
Location: Cold & Wet Europe!
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| 26 Sep 2005 20:29 Re: Latest RF tutorial uploaded |
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Hi all!
At last! - I managed to complete the L-C CMOS VCO (Variable Controlled Oscillator) tutorial - now under the RFIC Circuit menu.
Enjoy!
Cheers
Ody 
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spbhu
Joined: 05 Dec 2005
Posts: 42
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| 15 Dec 2005 18:06 Re: Latest RF tutorial uploaded |
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Hi, thanks very much for your tutorial posted! It benefits us too much!
Just want to ask, for the differentail cs LNA,why we have no load for ac-simulation, why a 50ohms terminal is needed for s-parameter simulation? I am confused about this question for a long time! Hope for you answer... Thanks very much
Added after 22 minutes:
Hi, I have another question. Can you show how to design a buffer following the LNA stage? What should be the load of the buffer? Is it 50ohms? Thanks
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xxargs
Joined: 28 Jul 2002
Posts: 231
Helped: 44
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| 15 Dec 2005 23:31 Re: Latest RF tutorial uploaded |
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| spbhu wrote: |
Hi, thanks very much for your tutorial posted! It benefits us too much!
Just want to ask, for the differentail cs LNA,why we have no load for ac-simulation, why a 50ohms terminal is needed for s-parameter simulation? I am confused about this question for a long time! Hope for you answer... Thanks very much
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Most measure equipmet is build for 50 Ohm reference (10 Ohm give very small distace between transmissions line and 900 - 1500 Ohm give very wide distance like High voltage air hanged power line and couple of meters between lines...)
Historic 600 Ohm using for air-hanged phone-line (around 400 mm distance between lines), 300 Ohm using for old TV and FM-broadcast depend of folded loop antenna give this impedances, and dipol give around ~75 Ohm and ground plane-antenna give ~50 Ohm. - and lastest used wide in mobile radio world and measure equipment build for this maket - and setting standard...
50 Ohm is only a reference - you can measure DUT in 50-Ohm NVA for making S-parameters and in simulators recalculate for example 300 Ohm port impedance or complex impedances typical situation on crystal-filters matching - or 2-5 Ohm typical on Power transistors in 1800 MHz etc.
I very fascinate first time long time ago I measure MF-filters separatly, feeding trasistors for this filter net, and complex load after this in separate S-parameter block.. (if not know feeding and load impedances first time - you need measure this as S-parameters)
MF-filters in VNA and 50 Ohm measure impedance seems like skit and crasy unrealistic value (if not know how this working - crystal filter seems possibly broken...).
But in simulator [1] - beginning feeding from S-parametes block transistor (I find working as current generator and high impedances) simulating as port in higher impedance value and filter going from very bad to good and after small adjust complex impedances (around 200-300 Ohm real part and small imaginary part), can make very good filters in simulators - and now understud why people mostly have tunable parallell resonace circurit each end of crystal-filters - just for make tunable very small amount of complex load in range of part of few pF to few nH or so... and very importent factor to give filter good shape.
...and back to phycial equipment now understud why how works and better to repair and tune this.
[1]
I try Vipec!! - open source linear simulator in first moment and working well for this experiment - and checking later on Ansoft for same result (but this is very expensive and need HW-keys/licenses... if using legal version... and give not so much more info compare to Vipec in this case)
/Xxargs
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spbhu
Joined: 05 Dec 2005
Posts: 42
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| 21 Dec 2005 16:52 Re: Latest RF tutorial uploaded |
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Thanks for you tutorial. Now I have a big problem when simulating the IIP3. How large load you put at the output port side? Just 50ohms ?But isn't the LNA connected to the mixer stage?And the effective load should be much large than 50ohms? (A few kilo-ohms?) Am I right?
How do you simulate IIP3 in ADS?There is a defined function called:ip3_in(), do you use this one to simulate ? The result from my simulation is quite strange, when I sweep the input power, it seems the IIP3 value increase, do you know why? Thanks very much for viewing...
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jannovak
Joined: 23 Apr 2006
Posts: 1
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| 23 Apr 2006 11:58 Latest RF tutorial uploaded |
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| YIG tuned oscillator
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juzi
Joined: 14 Jul 2005
Posts: 2
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| 05 Jun 2006 14:38 Re: Latest RF tutorial uploaded |
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:idea:hi, I've visite the site, it's wounderful. But there is not something about RF PA, especilly CMOS PA, Now I wonder information about this area.
many thanks!
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spacedude25
Joined: 23 Jun 2006
Posts: 4
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| 23 Jun 2006 15:01 Re: Latest RF tutorial uploaded |
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Hey, would be nice to find something about Helical Array Design, and mechanical design of helices.
Thanks!
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eejli
Joined: 24 Mar 2004
Posts: 109
Helped: 1
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| 26 Jun 2006 9:06 Latest RF tutorial uploaded |
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Hi,
Could you also give an good tutorial on how to exactly set up the phase noise simulation in ADS for accurate pnoise prediction. My VCO is an LC cross coupled type and I found the spectreRF has different result from that of RFDE. It got to be some pnoise simulation setup problem.
Thanks.
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mdeepamenon
Joined: 13 Apr 2006
Posts: 41
Helped: 1
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| 07 Jul 2006 6:50 Re: Latest RF tutorial uploaded |
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| please include synthetic apertures and metamaterials also.
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kil
Joined: 15 Feb 2006
Posts: 70
Helped: 1
Location: banglore
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| 14 Jul 2006 12:41 beginner for rf cmos vlsi design |
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hi ,
i want to be in RF cmos design side so i am going through BOOK : THE DESIGN OF CMOS RADIO FREQUENCY OF INTEGRATED CIRCUITS
by thomas H. LEE
all i wnat to know is what are the prerequesists i have to learn so that i can go through this book as i am beginner of RF design . i have knowledge of cmos analog vlsi design issues as i have gone through baker.
i need guidence how to start and how i can proceed and what are the prerequesites
thanks and regards,
kil
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hlasy
Joined: 21 Mar 2006
Posts: 20
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| 11 Oct 2006 7:54 Re: Latest RF tutorial uploaded |
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BOOK : THE DESIGN OF CMOS RADIO FREQUENCY OF INTEGRATED CIRCUITS
Any links ?
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ajitg
Joined: 18 Mar 2006
Posts: 6
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| 24 Oct 2006 21:08 Re: Latest RF tutorial uploaded |
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Hi,
Thomas Lee's book is pretty simple to read and he explains the basic concepts pretty well. If you have some Analog background, it just makes things easier. If you have some Microwave experience, it helps, but this is not needed.
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Vokhuyet
Joined: 21 May 2006
Posts: 4
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| 03 Dec 2006 14:19 Re: Latest RF tutorial uploaded |
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| I just read it but thank for your report
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halmstad
Joined: 27 Oct 2006
Posts: 39
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| 11 Dec 2006 22:30 Re: Latest RF tutorial uploaded |
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hi odyseus
your rf tutorial is very good iam looking this type of tutorials and thank for uploading these tutorials and i have a project that was designing of LNA with 2 stage and specifications are
freq:1.42GHz
n.f:<0.5db
bandwidth:20MHz
gain:>20db
iam attaching all my circuits step by step.
please can you check all my circuits if you have time...and im using ADS s/w for my simulation. and i have to fabricate and implement also.
for this design im using amplifier utility from design guide in ADS s/w.
for matching im using designguide....tools....smith chart from ADS s/w
please see all the attachments in following link
http://www.edaboard.com/viewtopic.php?p=744795#744795
thank u
waiting for u r reply
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Sadegh.j
Joined: 29 Nov 2006
Posts: 640
Helped: 32
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| 02 Jan 2007 13:11 Re: Latest RF tutorial uploaded |
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man!
Thanks! where can I find your tutorials on ADS?
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arkamu
Joined: 01 Mar 2007
Posts: 37
Helped: 1
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| 04 Mar 2007 21:48 Re: Latest RF tutorial uploaded |
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has any one solution manual
of
mpozar 3rd edition i need it plzzzzzzzzzzzzzzzzzzzzzzzzz
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tjunqueira
Joined: 09 Jan 2007
Posts: 40
Helped: 2
Location: Brazil - SP
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| 06 Mar 2007 13:34 Latest RF tutorial uploaded |
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Arkamu,
there is a topic with this book wher tou can download. Other way is to send me an e-mail and I send it you!
thadeuarj(at)gmail.com
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nazanin
Joined: 05 Mar 2007
Posts: 1016
Helped: 222
Location: iran
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| 29 Mar 2007 6:10 Re: Latest RF tutorial uploaded |
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you can download solution manual microwave by pozar edition 3 from link:
http://www.edaboard.com/viewtopic.php?t=223306&highlight=pozar+ebook+microwave
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mickey_melomane
Joined: 16 Jun 2006
Posts: 45
Helped: 2
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| 03 Apr 2007 19:41 Latest RF tutorial uploaded |
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RFDesign byThomas Lee is very good as it covers a broad area of concepts in an intuitive manner... Very useful and interesting... covers the concepts of Bandgaps in the best way...
It even contains a set of design examples for GPS receivers...
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