antenna-theory.com

[junaid]

i want solve one simple circuit with 1 resistor and 1 capacitor with supply voltage and want to solve that circuit with the help of maxwell's equation (NOT WITH THE CIRCUIT THEORY). please help me how to handel this task. please try to reply as early as possible.
thank you.

[bigSteve]

You have to simplify the equations. Resistance will be related to the sigma term (conductivity). Capacitance is related to the displacement current density term. Current is analogous to the magnetic field or current density. Electric Field is analogous to voltage. Try to make ohms law from maxwell's equations (V=IR becomes J=sigma*E), then work from there.

See www.maxwells-equations.com

[arka]

after converting to analogous EM quantities, use del X E = -dB/dt as generalized KVL and del.J = -d(rho)/dt , i.e. the continuity equation as generalized KCL..

[CgArnell]

Coming to this site and the site about Maxwell's Equations is like a breath of fresh air in a stifled and intellectual classroom. Thanks so much.

[CgArnell]

Maxwell's Equations.
I'm looking at the explanation of 'the curl', in figure 1 clearly talking about the magnetic flux circle of an EM wave... but....the axis of the D is not shown. Is the water flowing on both sides of the D with a vertical axis, or flowing under the D, perhaps with a horizontal axis? More uncertain is how the purple waterwheel of figure 2 might be rotating counter-clockwise, as stated, when the arrows are clearly indicating a circular set of vectors that would produce a clockwise direction.(unless one looks from the underside of the paper)
I'm looking at the math with the simple intent of defining the 'equations of a simple, single photon'.
I believe the single photon equations would simply be a representative divergence charge of 1 and a curl of 1.
I do suspect there will be a 'kinetic, rotational back and forth motion, that should be attributed to the curl equation and to the direction of the electric divergence vector making the arrows represented by the curl slosh back and forth like a washing machine agitator while the charge vector would be pointing out of the paper and then into the paper in sync with the magnetic curl vector rotating back and forth.
Any help will be appreciated. Thank you.

[CgArnell]

I think the D in figure 1 of the 'explanation of the curl' was meant to indicate that the circular set of arrows were meant to indicate a circular charge.. not expected at this point in th explanation.. so I think I have answered my own question about the rotation of 'D'. The rest of my questions are still hanging for now though. Thanks for any help.

[riham]

If the transmitter's impedance and cable impedance are pretty close (eg 50 ohms) then there shouldn't be much power re-reflected towards the antenna. The transmitter could have an isolater to absorb this reflected energy.