Log Periodic Tooth Antenna

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abti

Joined: 07 Jul 2004
Posts: 19

13 Jul 2004 15:17 planar log periodic tooth antenna

i have to simulate a log periodic triangular tooth antenna. The reference i have was designed to work for a frequency range from 3 to 11.6GHz. i have to simulate an antenna for a range from 100 to 300GHZ. obviously i have to scale down the geometry but which variables exactly should i change so that the result is the same at the new frequency range? should i just scale down the radii and leave all the angles as well as the tao and sigma the same ?

thanks

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flatulent

Joined: 19 Jul 2002
Posts: 4875
Helped: 324
Location: Middle Earth

13 Jul 2004 15:19 log periodic antenna tao

Since the antenna is planar, just scale dimensions on the x and y direction all by the same value as the old/new frequency ratio. You can visualize this as a 35 mm camera slide projector making the image on a screen. Moving the projector further away and refocusing will make the image larger.