coax to waveguide transition-HFSS

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rotmanlens

Joined: 13 Feb 2008
Posts: 52
Helped: 3

01 Jul 2009 19:47 hfss+coax+waveguide+transition

i am tryin to build my horn antenna array.i have two things which arent letting me get ahead .

1.since its an array my gain doesnt seem to be increasing with the increase in the number of horns.(note:its not a corporate fed array,horn are individually fed).

2.waveguide to coax transition.tried different probe sizes and did a optimetric analysis for the position of the probe.finally what i have is at the end of the my S11 is close to 0db.

all this has been done in hfss. if anyone has any input to this i would really appreciate it.

regards
sajid mohammed.

rotmanlens

Joined: 13 Feb 2008
Posts: 52
Helped: 3

02 Jul 2009 17:11 coaxial to waveguide transition

i figured the gain part.does anyone has any input for the coax to waveguide transition and viceversa.

thanks in advance.

sajid mohammed.

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02 Jul 2009 17:11 Ads

pabloec

Joined: 20 Sep 2007
Posts: 53
Helped: 9

07 Jul 2009 1:05 hfss+transition

how about those documents

http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?tp=&arnumber=759486&isnumber=16332

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rotmanlens

Joined: 13 Feb 2008
Posts: 52
Helped: 3

07 Jul 2009 23:42 coax to waveguide transition ads

anymore papers will be hugely appreciated.

sajid mohammed.

Azulykit

Joined: 18 Feb 2007
Posts: 851
Helped: 103
Location: All over the Map.

08 Jul 2009 4:04 waveguide+transition+hfss

s11 near 0 dB indicates a failure in the coax to waveguide transition. Separate the issue into parts. Work on the transition. Then work on the array elements using a modal wave port. Size the waveguide for your operating frequency. Finally when you have the parts working put them together and now you can work on the array.

rotmanlens

Joined: 13 Feb 2008
Posts: 52
Helped: 3

08 Jul 2009 7:58 coax to waveguide

array elements have been worked already.all i am left with is the transition.which seems to be the toughest part.i learnt that the coax transition will include a monopole at operating frequency.and been working as such

if u guys have any papers that would be recommendable to this problem will be highly appreciated.

sajid mohammed.