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Type: Posts; User: gemmy94

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1. ## Thread: Shooting and Bouncing Ray technique coding simulation

by gemmy94
Replies
0
Views
2,226

### Closed: Shooting and Bouncing Ray technique coding simulation

Hi everyone,
I would like to simulate propagation of Electromagnetics Wave in a city scenario for my master thesis.
Can anyone help me with any basic code of SBR method.
Thank you very much!
2. ## Thread: Enhancement bandwidth of Microstrip Patch Antenna

by gemmy94
Replies
5
Views
1,462

### Closed: Enhancement bandwidth of Microstrip Patch Antenna

Hi everyone,
I am designing an array Microstrip Patch antenna with the band 2.3-2.5 GHz. But the trouble come with single element. I cant design an antenna like that with the bandwidth of 200 MHz. ...
3. ## Thread: Minimum width of fabrication

by gemmy94
Replies
0
Views
445

### Closed: Minimum width of fabrication

Hi everyone,
I want to fabricate a plannar divider with one part, which is just 0.1mm in width. In Vietnam, there is no company can handle this problem. Is there anyone know where can do it (even...
4. ## Thread: CRLH Transmissionline

by gemmy94
Replies
6
Views
1,108

### Closed: Re: CRLH Transmissionline

I mean the Lleft in CRLH scheme, Mr Planar :) so do you get my question before?
Thank you for your document. It is very helpful.
5. ## Thread: CRLH Transmissionline

by gemmy94
Replies
6
Views
1,108

### Closed: Re: CRLH Transmissionline

So, the only way to create Left-Inductor is to use the via. I have read one paper about use the via-less...
6. ## Thread: CRLH Transmissionline

by gemmy94
Replies
6
Views
1,108

### Closed: CRLH Transmissionline

I am designing a CRLH TL in microstrip line. From the equivalent circuit of CRLH TL, in theory, the left-Inductance can be get by connect the conductor on the upper plane of substrate to the ground...
7. ## Thread: Antenna Engineering in Aircraft

by gemmy94
Replies
0
Views
668

### Closed: Antenna Engineering in Aircraft

Hi everyone, i am very interested in avionics aircraft engineering. I am studying at Vietnam in aeronautical area, but there is so little documents and supports in this area in my country. I would...
8. ## Thread: S11 from MIMO antenna SImulation

by gemmy94
Replies
9
Views
1,545

### Closed: Re: S11 from MIMO antenna SImulation

I expected S11 in two case is the same, because in HFSS the first port only excited, so in my view i thought S11 in both case will not change.

- - - Updated - - -

I expected S11 in two case...
9. ## Thread: S11 from MIMO antenna SImulation

by gemmy94
Replies
9
Views
1,545

### Closed: S11 from MIMO antenna SImulation

Hi everyone,
I have a little confused when simulate MIMO antenna.
Firstly, i simulate two antennas that are symmetric each other with one port only for antenna 1.
Second, i simulate them in the...
10. ## Thread: How do you know the polarization of antenna in hfss?

by gemmy94
Replies
8
Views
3,959

### Closed: Re: how to know polarisation of antenna in hfss?

I am the new in this area. Could you tell us more detail as reading that graph to show the polarisation?
Thank you so much!!
11. ## Thread: Trouble in "Unite" operation

by gemmy94
Replies
0
Views
1,175

### Closed: Trouble in "Unite" operation

I am designing a word antenna that is embroidered on a cloth. I get a trouble in simulation, which is the Unite operation. The HFSS notified that:
- Acis error: "Fail to make union..Acis Error 40002...
12. ## Thread: Dual-band Monopole in Microstrip

by gemmy94
Replies
8
Views
1,057

### Closed: Re: Dual-band Monopole in Microstrip

Thank you so much, vfone
You must have many experiences, i now like to ask you about the "substrate" and "ground" for this antenna in my project (especially in their dimensions). I do an antenna...
13. ## Thread: Dual-band Monopole in Microstrip

by gemmy94
Replies
8
Views
1,057

### Closed: Re: Dual-band Monopole in Microstrip

I have project designing coupled antenna by Decoupling Network for antenna at frequency 1.8 and 2.6 Ghz. So far i thought should do two antenna with two port first, then i take the decoupling network...
14. ## Thread: Dual-band Monopole in Microstrip

by gemmy94
Replies
8
Views
1,057

### Closed: Re: Dual-band Monopole in Microstrip

I just get size for dual-band of 2.45 and 5.2 GHz (l1 = 26.5mm, l2 = 5.3mm). For this length the plot of S11 is very good (figure below) but i can't adjust dimension for dual-band of 1.8 and 2.6 GHz....
15. ## Thread: Dual-band Monopole in Microstrip

by gemmy94
Replies
8
Views
1,057

### Closed: Dual-band Monopole in Microstrip

Hi everybody,
I am having a little trouble in designing a dual-band monopole by microstrip at frequency 1.8 GHz and 2.6 GHz. I can't adjust the length l1 and l2 (in the figure) to responsible for...
16. ## Thread: s parameter problem on cst 2010

by gemmy94
Replies
3
Views
883

### Closed: Re: s parameter problem on cst 2010

That error may be due to the step you choose between each run. Example
First run: 1GHz - 3GHz with step 1000 but after that it is rechanged step to 500.
17. ## Thread: "Mesh" function in HFSS

by gemmy94
Replies
3
Views
890

### Closed: Re: "Mesh" function in HFSS

Maybe i 'd written wrong in my post before. Actually i would like to ask about "Mesh" in HFSS.
Thank you!
18. ## Thread: "Mesh" function in HFSS

by gemmy94
Replies
3
Views
890

### Closed: "Mesh" function in HFSS

Hi everybody,
I have one question that i am wondering how "Mesh" function work in matlab. Could you give me some references and documentations about this.
Thank you so much!
19. ## Thread: Ansoft HFSS port problem

by gemmy94
Replies
3
Views
1,023

### Closed: Re: Ansoft HFSS port problem

- The 1st selection: You can use Lump Port when using Transmission line (the port is drawn inside the substrate)
- The 2nd selection: You can use Wave port for feeding by coaxial.
Remember Wave...
20. ## Thread: Evaluate graph of bandwidth

by gemmy94
Replies
0
Views
572

### Closed: Evaluate graph of bandwidth

Hi everyone,
I am having trouble about evaluating graph of bandwidth, how to make Matlab understand how good a graph is?
Example: Resonant frequency = 3.6 and S11 at there < -10 dB, bandwidth...
21. ## Thread: Error of fixing number in HFSS

by gemmy94
Replies
4
Views
658

### Closed: Re: Error of fixing number in HFSS

Thank you for considering,planarmaterial. Unit is "mm"
22. ## Thread: Error of fixing number in HFSS

by gemmy94
Replies
4
Views
658

### Closed: Error of fixing number in HFSS

Hi everybody,
When i input the index for parameters in floating number like "4.56, 5.34,...", it always automatically change these numbers to integer like this 4, 5,...
Could someone help me...
23. ## Thread: Genetic Algorithm for antenna

by gemmy94
Replies
0
Views
849

### Closed: Genetic Algorithm for antenna

Hi everybody,
I am having a project about "optimization for antenna using HFSS simulation through HFSS API". My trouble is now when i export data under Excel or Matlab table from HFSS result, i dont...
24. ## Thread: Genetic Algorithm optimization for antenna

by gemmy94
Replies
0
Views
782

### Closed: Genetic Algorithm optimization for antenna

Hi everybody,
My name is Ngoc, I am the third year student at Ha Noi University of Science and Technology in Vietnam. I am having a project about "optimization for antenna using HFSS simulation...
25. ## Thread: Linking HFSS and Matlab

by gemmy94
Replies
2
Views
1,298

### Closed: Re: Linking HFSS and Matlab

Thank you so much phen3x. I now having another trouble in my project GA relating to analyze the result exported from HFSS. I dont know any idea or code for that. Could you reference me a simple code...
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