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Spiral Antenna in the range of 1 -18 GHz

 
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Meera S
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Joined: 12 Feb 2015
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Location: Kerala
PostPosted: Thu Feb 12, 2015 5:35 am    Post subject: Spiral Antenna in the range of 1 -18 GHz Reply with quote
Dear all,
I am working on a cavity backed spiral antenna in the range of 1-18 GHz range. Initially i have designed spiral antenna using CST software. but squint is appearing in the radiation pattern at 12 GHz . Squint is about 15 degrees. I tried to optimize the squint. But it is migrating to different frequencies. When the balun is attached the squint increases and appears at different frequency points. Kindly advice me how to remove the squint.

Design is having size restrictions. Outer dia of spiral should be less than 65 and cavity length of 45

Thanking you all
Meera
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