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Monopole Antenna Designing - RF Cafe Forums

The original RF Cafe Forums were shut down in late 2012 due to maintenance issues. Original posts:

Amateur Radio | Antennas | Circuits & Components | Systems | Test & Measurement

 Post subject: Monopole antenna Designing
Posted: Fri Jun 03, 2005 5:22 am 
I m designing a ISM RF trasmitter(10mW type) operating frequency is 315 MHz

I want to use a monopole type of antenna plz guide me how to design a
monopole antenna(any article,formulae) for a particular frequency,what
should be the material/thichness for the wire used(copper,etc) and how to designit to have 50ohm or any input impeadence,

also guide me how can i measure the input impeadence of an
antenna(monopole-single wire type) practically.plz tell me if there is any
software for the designing this kind of antennas

with regards
pallav Aggarwal

 Post subject:
Posted: Sun Oct 16, 2005 9:52 pm 
Use 24cm long wire (Quaterwave Monopole) with gnd plane.

 Post subject:
Posted: Fri Oct 21, 2005 10:34 am 
buy a simple magnetic antenna used for car radio (like the one you see on taxi for it's communication) and then cut the antenna to 0.25 wave length. you can check it with a NA.
use it with a gound plane.

Posted  11/12/2012

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