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havejr01
Antenna-Theory.com Newbie
Joined: 08 Apr 2014
Posts: 1
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 Posted: Tue Apr 08, 2014 11:39 am Post subject: Equivalent Cirtcuit |
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| How would you go about determining the equivalent circuit of a planar antenna so that you are able to simulate it in SONNET or ANSOFT? |
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Schubert
Antenna Wizard
Joined: 08 Apr 2009
Posts: 161
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| Posted: Fri Apr 11, 2014 9:38 pm Post subject: |
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There are a few ways depending on what type of antenna it is.
If you have a simple half-wavelength dipole antenna, you can assume a resistor of 70 Ohms and some inductance (impedance is about 73 + j43 ohms) depending on the frequency.
If you have a complicated antenna, you can measure it on a Vector Network Analyzer (VNA) to get the impedance and then make a simple circuit.
Generally you will have some resistance (for radiation resistance + loss resistance) and either some capacitance or inductance in series. |
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