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High gain 3.5 GHz antenna

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petrus999

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Guys

I need some help in designing a monopole antenna that has a average gain of over 4 dBi at 3.5 GHz.... Do any of you have a HFSS simulation that could help me out...

Petrus
 

That should not be a problem. Kraus among others has design guidance. You might also look into Jasik (Jasik/Johnosn, Johnson, Volakis) Antenna Handbook. Pay attention to your ground plane size. The bigger the better.

ARRL certainly has more design guidance.

I don't have a HFSS model but this is not a hard antenna to build from the ground up.
 

I have tried the following, i have designed a two half wavelength 3.5 ghz antennas with the a phase shift in the middle using a meander line, I am not sure if this can be done. Does anyone with experience of designing these antennas be able to help out....

The file is HFSSv11
 

A single monopole will exceed 4 dBi so why mess with two?

A pair of monopoles (can) get you into the 8 to 9 dBi range. Too much from your earlier posts.
 

I want the gain to be a minimum of 4dbi not peak. it also has to be smaller than 80mm long
 

Minimum gain of 4 dBi? What are you trying to describe?

What dimension does the 80 mm reference? At 3.5 GHz you have a wavelength of about 85 mm. What is your point?

I don't see the intent in your last post.
 

well i tried simulating that and it did not work.. The grounplane has a big influence of the antenna pattern. This is because surface waves propagate on the PCB and when they encounter a discontinuinty they radiate and distorb the main antenna pattern
 

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