Re: Soft for 915 MHz antenna design?
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Please don't reply unless you have useful information to add on this post.Thanks.
Depending on what type of antenna want to use. For "classical" yagi, logperiodic NEC4WIN would be ideal.
EZNEC Antenna Software would be the choice for you.
You can download a free EZNEC 3.0 demo version from http://www.eznec.com/
SuperNEC has now version 1.53 for free...but it need MatLab to be installed.
http://www.poynting.co.za/software/snec_downloads.shtml
vfone
and CST Microwave Studio is a choice too...
if you're modelling a "wire" antenna you should use any nec software, I recomend eznec,, its very simple to use
AMAZING! This topic was created 2 years ago!
In my opinion,HFSS,the soft of ansoft ,perhaps is a good choice.
Microstrip array is a good choice too
If try to build this antenna by you.
Please use the geometry of yagi antenna 12 element below:
NOTES Automatically produced by first
FREQUENCY 915.000000
MIN_FREQUENCY 914.000000
MAX_FREQUENCY 916.000000
STEP_FREQUENCY 0.100000
ELEMENTS 12
DRIVEN 1
PARASITIC 11
ANGULAR_STEP 180.000000
#DATA_DRIVEN x y length diameter voltage(r) voltage(i)
DATA_DRIVEN 0.06557 0.00000 0.14990 0.00300 1.00000 0.00000
#DATA_PARASITIC x y length diameter
DATA_PARASITIC
0.00000 0.00000 0.15754 0.00300 reflector
0.09016 0.00000 0.14004 0.00300 D1
0.14918 0.00000 0.13845 0.00300 D2
0.21967 0.00000 0.13654 0.00300 D3
0.30164 0.00000 0.13464 0.00300 D4
0.39344 0.00000 0.13337 0.00300 D5
0.49180 0.00000 0.13179 0.00300 D6
0.59508 0.00000 0.13084 0.00300 D7
0.70328 0.00000 0.12957 0.00300 D8
0.81639 0.00000 0.12893 0.00300 D9
0.93443 0.00000 0.12830 0.00300 D10
use alumunium 3 mm for all element
the performance of antenna is:
# Driven=1 parasitic=11 total-elements=12 design=915.000MHz
# Checked from 914.000MHz to 916.000MHz.
f(MHz) E(deg) H(deg) R jX VSWR Gain(dBi) FB(dB) SideLobes(dB)
914.000 38.2 41.9 35.53 -11.80 1.552 13.621 19.145 0.000
914.100 38.1 41.8 35.58 -11.75 1.549 13.625 19.130 0.000
914.200 38.1 41.8 35.64 -11.71 1.546 13.629 19.114 0.000
914.300 38.1 41.8 35.69 -11.66 1.543 13.633 19.098 0.000
914.400 38.1 41.8 35.75 -11.61 1.540 13.636 19.083 0.000
914.500 38.1 41.8 35.80 -11.57 1.536 13.640 19.066 0.000
914.600 38.1 41.8 35.86 -11.52 1.533 13.644 19.050 0.000
914.700 38.1 41.7 35.92 -11.48 1.530 13.648 19.034 0.000
914.800 38.1 41.7 35.97 -11.43 1.527 13.652 19.017 0.000
914.900 38.1 41.7 36.03 -11.39 1.524 13.656 19.000 0.000
915.000 38.0 41.7 36.09 -11.35 1.521 13.660 18.983 0.000
915.100 38.0 41.7 36.14 -11.30 1.518 13.664 18.966 0.000
915.200 38.0 41.7 36.20 -11.26 1.515 13.667 18.948 0.000
915.300 38.0 41.6 36.26 -11.22 1.512 13.671 18.931 0.000
915.400 38.0 41.6 36.31 -11.17 1.509 13.675 18.913 0.000
915.500 38.0 41.6 36.37 -11.13 1.506 13.679 18.896 0.000
915.600 38.0 41.6 36.43 -11.09 1.504 13.683 18.878 0.000
915.700 38.0 41.6 36.49 -11.05 1.501 13.686 18.860 0.000
915.800 37.9 41.6 36.54 -11.01 1.498 13.690 18.841 0.000
915.900 37.9 41.6 36.60 -10.97 1.495 13.694 18.823 0.000
916.000 37.9 41.5 36.66 -10.93 1.492 13.698 18.805 0.000