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Jim Thompson
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 Posted: Mon Jun 30, 2008 7:43 am Post subject: Model of Loopstick Antenna?? |
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Is the proper model of a loopstick antenna an inductance with a
voltage source in series (representing the signal)?
Or would something else be a better representation?
...Jim Thompson
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Wimpie
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| Posted: Mon Jun 30, 2008 8:19 am Post subject: Re: Model of Loopstick Antenna?? |
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On 30 jun, 04:43, Jim Thompson <To-Email-Use-The-Envelope-I...@My-Web-
Site.com> wrote:
[quote]Is the proper model of a loopstick antenna an inductance with a
voltage source in series (representing the signal)?
Or would something else be a better representation?
...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC>s and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon athttp://www.analog-innovations.com| 1962 |
| |
| America: Land of the Free, Because of the Brave |
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| Due to excessive spam, googlegroups, UAR & AIOE are blocked! |
[/quote]
Hello Jim,
Whether an inductor is a reasonable model depends on what you do and
what you want. I would use at least an RLC approach (all in parallel
and a voltage source in series with the L or current source parallel
to the RLC circuit).
The reason for this is that around the resonant frequency your input
amplifier may show strange behavior (oscillation?) that you may
overlook by just using an inductor.
For modeling the frequency dependent core losses, you need a higher
order model. In most cases that is not required.
Best regards,
Wim
PA3DJS
www.tetech.nl
the email does work when you remove abc. |
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Robert Baer
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| Posted: Tue Jul 01, 2008 10:41 am Post subject: Re: Model of Loopstick Antenna?? |
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Jim Thompson wrote:
[quote]Is the proper model of a loopstick antenna an inductance with a
voltage source in series (representing the signal)?
Or would something else be a better representation?
...Jim Thompson
Add a frequency dependent resistance in series, and a capacitance in[/quote]
parallel to that (at minimum)... |
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JosephKK
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| Posted: Sat Jul 05, 2008 4:07 am Post subject: Re: Model of Loopstick Antenna?? |
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On Sun, 29 Jun 2008 19:43:12 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@My-Web-Site.com> wrote:
[quote]Is the proper model of a loopstick antenna an inductance with a
voltage source in series (representing the signal)?
Or would something else be a better representation?
...Jim Thompson
[/quote]
Depending on what you wanted to model. you could also add a large
stack of modulated sources. Consider resonant antennas, adjacent
channel interference, image rejection, and similar issues as needed.
Model what is needed for the design in question. |
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