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Antenna for field measure at 3.5Ghz - RF Cafe Forums
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MR.D. |
Post subject: Antenna for field measure at
3.5Ghz
Posted: Tue Jul 11, 2006 7:24 am
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Joined: Wed Nov 30, 2005
8:22 am Posts: 2 |
Hello, i need to realize some indoor/outdoor
measure at 3.5Ghz. For realize this measure is
necessary a nonperturbative, x-y-z axis Rx antenna.
My idea is realize a narrow band measure with
spectrum-analyzer, so a large-band probe for EMC
measure is not good. I don't find any antenna
with this characteristic. Build it is not too
easy!! Could anyone help me?? MR.D. [/list]
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nubbage |
Post subject: Antenna for Field Measure at
3.5G
Posted: Tue Jul 11, 2006 12:40 pm
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General |
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Joined: Fri Feb 17, 2006
12:07 pm Posts: 218 Location: London UK
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The least perturbing narrow band antenna is probably
a quater-wave groundplane or quarterwave sleeve
balun type. The length is about 2.1 cm at
3.5GHz, the horizontal H plane radiation pattern
is omni and the E plane pattern is fairly broad.
Just strip back 2.1 cm of semi-rigid coax, and add
a small ground plane of radial wires to the solid
outer at right-angles to the center conductor
Calibrating the gain accurately might be a problem,
although there is probably now enough field experience
of ground-plane antenna gain that you could find
enough references on the web
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Posted 11/12/2012
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