From 6216ab401c0e71c69e166c6b01460c932ed5c48a Mon Sep 17 00:00:00 2001 From: Craig Warren Date: Mon, 5 Dec 2016 15:18:35 +0000 Subject: [PATCH] Clarified length of the Hertzian dipole, dl, is automatically set to dx, dy, or dz depending on the polarisation. --- docs/source/input.rst | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/docs/source/input.rst b/docs/source/input.rst index a21e1ab5..680bf3cb 100644 --- a/docs/source/input.rst +++ b/docs/source/input.rst @@ -712,7 +712,19 @@ Then to use ``my_pulse1`` custom waveform shape with, for example, an z polarise #hertzian_dipole: ----------------- -Allows you to specify a current density term at an electric field location (the simplest excitation). This will simulate an infinitesimal electric dipole (it does have a length of :math:`\Delta l`). This is often referred to as an additive or soft source. The syntax of the command is: +Allows you to specify a current density term at an electric field location - the simplest excitation, often referred to as an additive or soft source. + +.. math:: + + J_s = \frac{I \Delta l}{\Delta x \Delta y \Delta z}, + +where :math:`J_s` is the current density, :math:`I` is the current, :math:`\Delta l` is the length of the infinitesimal electric dipole, and :math:`\Delta x`, :math:`\Delta y`, and :math:`\Delta z` are the spatial resolution of the grid. + +.. note:: + + * :math:`\Delta l` is set equal to :math:`\Delta x`, :math:`\Delta y`, or :math:`\Delta z` depending on the specified polarisation. + +The syntax of the command is: .. code-block:: none