2.4GHz or 5.2GHz IFA (Inverted "F" Antenna),who ha

[eirp]

Re: 2.4GHz or 5.2GHz IFA (Inverted "F" Antenna),wh

Element7k,

MyCPU speed is about 633MHz, and RAM maybe 128MB.

And today morning, I tried again, with the same error message "insufficient memory".

I am on holiday now (China National Day), so I simulated it on my own computer, tomorrow I will try it on university's computer.

2GHz*10min=633MHz*????

???=half day !!!

Dear yellowtooth,

these parameters are too deficient for simulation. Consider that Windows takes approx. half of your RAM.. In my opinion, minimum amount of RAM is 512MB.
Rgz,
Eirp

 

[eirp]

Re: 2.4GHz or 5.2GHz IFA (Inverted "F" Antenna),wh

Element7k,

MyCPU speed is about 633MHz, and RAM maybe 128MB.

And today morning, I tried again, with the same error message "insufficient memory".

I am on holiday now (China National Day), so I simulated it on my own computer, tomorrow I will try it on university's computer.

2GHz*10min=633MHz*????

???=half day !!!

Dear yellowtooth,

these parameters are too deficient for simulation. Consider that Windows takes approx. half of your RAM.. In my opinion, minimum amount of RAM is 512MB.
Rgz,
Eirp

 

[Element7k]

Re: 2.4GHz or 5.2GHz IFA (Inverted "F" Antenna),wh

Hi yellowtooth,

eirp is right. Sorry to say but your home PC is definitely insufficent to run kayaoo's simulation. I think he used about 8000 thetras so 128 ram is not enough. HF$$ will use diskswap if there is not enough ram. The interface is so imaginable slow that it might even take you >> whole afternoon :lol: The more Ram the better if u are running simulations.

2GHz*10min=633MHz*????
yeh... better to enjoy your holidays then spend half a day getting no results from d software


Cheers,
Element7k

Element7k,

MyCPU speed is about 633MHz, and RAM maybe 128MB.

And today morning, I tried again, with the same error message "insufficient memory".

I am on holiday now (China National Day), so I simulated it on my own computer, tomorrow I will try it on university's computer.

2GHz*10min=633MHz*????

???=half day !!!

 

[yellowtooth]

Re: 2.4GHz or 5.2GHz IFA (Inverted "F" Antenna),wh

Thank both of U for the information.

Indeed the China is a developing country now.

So I have not 512MB RAM yet.

Just a joke.

 

[Element7k]

Re: 2.4GHz or 5.2GHz IFA (Inverted "F" Antenna),wh

Hi yellowtooth,

indeed your "developing" country is buying lots of eda softwares (legal + xx) and giving out lots of telecom contract out to MNCs! The market is over there in China now! So maybe your RAM will increase x10 very very soon

Element7k

Thank both of U for the information.

Indeed the China is a developing country now.

So I have not 512MB RAM yet.

Just a joke.

 

[kayaoo]

Re: 2.4GHz or 5.2GHz IFA (Inverted "F" Antenna),wh

hi element7K,
it's great to see such a hot theme. my last post about multilayer problems sinks deeply in page 1.it has baffled me many days.can u help me?
1, how to simulate the antenna accurately?
2, how to make the most of the additional metal layers?
3, does the design bring much fabricating difficulties?
sincerely,
kayaoo

 

[kayaoo]

Re: 2.4GHz or 5.2GHz IFA (Inverted "F" Antenna),wh

hi yellowtooth,
my computer is 850+256M.it works,i mean, "works". the ram is so expensive this day. but i think an athlon3.2G+512M computer is coming soon.

 

[Element7k]

Re: 2.4GHz or 5.2GHz IFA (Inverted "F" Antenna),wh

Hi kayaoo,

If ur antenna is connected to other devices, it will be better to use a co-planar feed. That way, devices can be connected directly to the antenna with a matched line. I am assuming that your structure is multilayer with dielectric between each metal layer.

I don't really know what is the exact structure of your antenna but in general, to simulate the antenna "accurately", my suggestion will be to add a few more via holes and have a look at the current flow. Increase the "resolution" of the model - e.g. more details to those regions with high currents and uncover any discontinuities that you might have missed out on previously. Also increase the mesh in these regions and I think edge mesh helps most in this antenna.

If you are talking about just antenna, of course multilayer means more work=more material = more money. KL Wong's antenna can be easily fabricated in a day using a simple fabrication unit but I will have to send your design away to a specialised fabrication firm where they will be happy to charge an extortionate amount of money for a single multilayered prototype design. Also, if you find out that it doesn't quite perform like what you have expected, you have to repeat the process all over again. More design time = >> $$$

At least from what I am working on, I think the trend is towards modular design and usually there is a section that does RF chips and other stuff and antenna design by another section or usually contracted out to other antenna companies so the more independent the better.


Cheers,
Element7k

hi element7K,
it's great to see such a hot theme. my last post about multilayer problems sinks deeply in page 1.it has baffled me many days.can u help me?
1, how to simulate the antenna accurately?
2, how to make the most of the additional metal layers?
3, does the design bring much fabricating difficulties?
sincerely,
kayaoo

 

[Element7k]

Re: 2.4GHz or 5.2GHz IFA (Inverted "F" Antenna),wh

Hi kayaoo,

ram expensive? I thought they are getting cheaper everyday?! @ns0ft recommends a min of 512M for v9. Otherwise u will have to get a very big harddisk. Oooh.. 3.2 G Athlon... my dream machine at the moment. :evil:

Cheers,
Element7k

hi yellowtooth,
my computer is 850+256M.it works,i mean, "works". the ram is so expensive this day. but i think an athlon3.2G+512M computer is coming soon.

 

[kayaoo]

Re: 2.4GHz or 5.2GHz IFA (Inverted "F" Antenna),wh

At least from what I am working on, I think the trend is towards modular design and usually there is a section that does RF chips and other stuff and antenna design by another section or usually contracted out to other antenna companies so the more independent the better.

hi, element7k
thanks for ur advice.i agree with u modular design is the mainstream. but sometimes an antenna layouted on the pcb has many benifits:
1, it is cheap and easymounting for mass production.
2, it is easy to analysis. we can optimize the performance as a whole. insteadly, when a chip antenna is used, it becomes difficult to predict its onboard performance, especially, when several multiband antennas are mounted on a small pcb.frankly,i don't know how to do with them.
3. it can be modified freely.u know,conversation with another team is so difficult and time consuming today and antennas topics is very complex.changing the position of a antenna may bring many problems.
4.multilayer is a valuable resource.
5. it always looks beautiful, i think.

sincerely,
kayaoo

 

[Ghost Tweaker]

Re: 2.4GHz or 5.2GHz IFA (Inverted "F" Antenna),wh

Hi everyone,

I'm getting started with HFSS and your posts really help. Which file do I import when I want to simulate your antenna ? *.sm3, *.sml ? Until now I only got the antenna 3D model but no information about excitation, boundary and so on imported?!?

Thanx in advanceGhost

 

[Element7k]

Re: 2.4GHz or 5.2GHz IFA (Inverted "F" Antenna),wh

Hi ghost tweaker,

here is the hfss file for you to teak. the sm3 and sat files are only geomentry so they don't contain port information.

Hope this helps.

Cheers,
Element7k

Hi everyone,

I'm getting started with HFSS and your posts really help. Which file do I import when I want to simulate your antenna ? *.sm3, *.sml ? Until now I only got the antenna 3D model but no information about excitation, boundary and so on imported?!?

Thanx in advanceGhost

 

[mxwang]

Hi, Can I get some .hfss file for the antenna design? Where can down load?

Thanks, Mike

Added after 11 minutes:

I am new here, and working with Bluetooth & GSM antennas.


Could you please upload some of antennas in hf$$ 9? I need more examples on PIF Aantennas.

Thanks in advance,

Mike

Added after 1 hours 15 minutes:

Hi EIRP!,

I was intending to do that but files are too big (75MB) :? When I have time I will detail the steps I took in H/F/S/S in pdf and hopefully everyone can have a look and then give some comments, point out any mistake or any improvements that can be made to the simulation. 8)

I didn't use PML for this project. However, I can imagine that it cannot be very much different. I will think instead of a lambda/4 box, you can use a lambda/10 box.

Cheers,
Element7k

Dear Element7k,

please can you post your hf$$ project also?
You know I'm still curious about pml settings there.
Thanks in advance, buddy!!

Best,

Eirp

Yes, PML is not clear, Could you put more detail about it, & Could you please send .hfss for me by e-mail? I am new here, no points to download files

Thanks, Mike
(mxwang@hotmail.com)

 

[kevinj]

Re: 2.4GHz or 5.2GHz IFA (Inverted "F" Antenna),wh

I simulated element7k's pifa in H-fss and received different results as well. I did notice that the results do NOT converge at either setup1 or setup2. If anyone else received these results let me know.

 

[adamzhao]

how can I download the attached file ?

Analysis and design of an inverted-F antenna printed on a PCMCIA card for the 2.4 GHz ISM band .pdf

I have no points now!

 

[unkarc]

Re: 2.4GHz or 5.2GHz IFA (Inverted "F" Antenna),wh

Hi,

If you click on the Free mirror (no points) under the Download icon, then cannot you download it?

unkarc

 

[costox]

Hi friends,

Quick question on MWS.

Do you happen to know how to PICK all the points at the same time on a surface of a complex structure in Microwave Studio 5.x?

Right now, I have to zoom in, then double-click ONE POINT at a time, then press control, then double-click again on another point, then again on another point, etc.

Imagine if my structure surface has 100 points, that would mean I have to double-click 100 times!

Is there a way to slide the mouse on the entire structure and pick all the points on that structure ?

Thank you so much friends for you help!

 

[mvdeepaknair]

Re: 2.4GHz or 5.2GHz IFA (Inverted "F" Antenna),wh

you can check hfss Tutorial manual named hfss 10 book hope it will clear your doubts

 

[hasanynlmz]

hi all
i need a wideband wlan antenna. can i use inverted f antenna .please help me

thanks

 

[ahsaan]

Re: 2.4GHz or 5.2GHz IFA (Inverted "F" Antenna),wh

Dear Elemnt7k
Pl post your hf s s project. I also want pifa simulation
Thanks