Updated example on wire dipole model.

docs/source/input.rst

@@ -764,7 +764,7 @@ For example, to specify a y directed voltage source with an internal resistance
 #transmission_line:
 -------------------
 
-Allows you to introduce a one-dimensional transmission line model at an electric field location. The transmission line has a specified resistance. It is useful for exciting antennas when the physical properties of the antenna are included in the model. The syntax of the command is:
+Allows you to introduce a one-dimensional transmission line model [MAL1994]_ at an electric field location. The transmission line has a specified resistance. It is useful for exciting antennas when the physical properties of the antenna are included in the model. The syntax of the command is:
 
 .. code-block:: none
 
@@ -776,10 +776,12 @@ Allows you to introduce a one-dimensional transmission line model at an electric
 * ``f5 f6`` are optional parameters. ``f5`` is a time delay in starting the excitation of the transmission line. ``f6`` is a time to remove the excitation of the transmission line. If the time window is longer than the excitation of the transmission line removal time then the excitation of the transmission line will stop after the excitation of the transmission line removal time. If the excitation of the transmission line removal time is longer than the time window then the excitation of the transmission line will be active for the entire time window. If ``f5 f6`` are omitted the excitation of the transmission line will start at the beginning of time window and stop at the end of the time window.
 * ``str1`` is the identifier of the waveform that should be used with the source.
 
-Time histories of voltage and current values in the transmission line are saved to the output file. These are documented in the :ref:`output file section <output>`. These parameters are useful for calculating characteristics of an antenna such as the input impedance or S-parameters.
+Time histories of voltage and current values in the transmission line are saved to the output file. These are documented in the :ref:`output file section <output>`. These parameters are useful for calculating characteristics of an antenna such as the input impedance or S-parameters. gprMax includes a Python module (in the ``tools`` package) to help you view the input impedance and s11 parameter from an antenna model fed using a transmission line. Details of how to use this module is given in the :ref:`tools section <plotting>`.
 
 For example, to specify a z directed transmission line source with a resistance of 75 Ohms, an amplitude of five, and a 1.2 GHz centre frequency Gaussian waveform use: ``#waveform: gaussian 5 1.2e9 my_gauss_pulse`` and ``#transmission_line: z 0.05 0.05 0.05 75 my_gauss_pulse``.
 
+An example antenna model using a transmission line can be found in the :ref:`examples section <example-wire-dipole>`.
+
 #rx:
 ----