Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

helix antenna prob. : hfss

Status
Not open for further replies.

abhi_kolkata

Member level 5
Joined
Oct 5, 2005
Messages
84
Helped
2
Reputation
4
Reaction score
2
Trophy points
1,288
Activity points
2,115
hi,

im faced with the problem of simulating a helix antenna in hfss. i have created a valid helical antenna with ground plane and coaxial feed .but the actual simulation is taking a lot of time, and getting struck just after initial meshing.

so does anybody have any idea of how to reduce the simulation time and get it simulated sucessfully.may be i need to use any suface meshing approximation for the solid helical surface (i am in doubt).OR some other effective method.

witing fo ur replies

with regards
abhi
 

danteh

Newbie level 2
Joined
Nov 25, 2006
Messages
2
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,295
if you use 16 segments per turn and square section of wire, you obtain a very important reduction of time and memory use.
For example: I have used it in a helix antenna (bifilar helix, 2 turn)

tools helix: 2:30 hrs and 130000thetraedros
segment aprox : 0:02 hrs and 7000 thetraedros, with the same radiation pattern and the same impedance.
 

abhi_kolkata

Member level 5
Joined
Oct 5, 2005
Messages
84
Helped
2
Reputation
4
Reaction score
2
Trophy points
1,288
Activity points
2,115
hi,

but i don't know how to assign, say, 16 segments per helical turn in hfss.

could u kindly tell me how to do that.

with regards
abhi
 

danteh

Newbie level 2
Joined
Nov 25, 2006
Messages
2
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,295
there two ways of doing it:

1) to create 16 square cross sections (without rotation) per turn and later to join the surfaces with 'unite' tool. select 'rectangle1' , 'rectangle2' apply 'unite', select 'rectangle2_1' , 'rectangle3' apply 'unite', etc.
The result is linear segments with square section with a helix shape. The position of the n-cross section is:
xn: r cos (Φn) r: radius helix Φn: 0, pi/8 , pi /4 , ......
yn: r sin (Φn)
zn: n*pitch/16 pitch: height per turn

2) to create 1 square cross sections and create a Line with segments (xn,yn,zn) and later use tool 'swep along path' to generate all the helix at once.

regards, Dante from (Instituto Argentino de Radioastronomia)
 

Twinkal

Newbie level 3
Joined
Dec 15, 2010
Messages
3
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,291
i m phasing the problem to design helical antenna for 12GHz.may be due to some problem of calculating pitch. so pls will u tell me how to calculate?
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top