{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Interactive Mismatched Line"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Intro"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "This is a demonstration of using IPythons `interact` function with some of `skrf`'s network creation methods."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "<div class=\"alert alert-success\">\n",
    "As of IPython 2.0, the widgets in this notebook won't show up on http://nbviewer.ipython.org. To view the widgets and interact with them, you will need to download this notebook and run it with an IPython Notebook server.\n",
    "</div>"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "from IPython.display import YouTubeVideo\n",
    "\n",
    "YouTubeVideo('JyYi_1SswXs',width=700, height=580)\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "import matplotlib.pyplot as plt\n",
    "from ipywidgets import interact\n",
    "\n",
    "%matplotlib inline\n",
    "\n",
    "import skrf as rf\n",
    "from skrf.frequency import Frequency\n",
    "from skrf.media import DistributedCircuit\n",
    "\n",
    "rf.stylely()\n",
    "\n",
    "\n",
    "# define a frequency object\n",
    "freq = Frequency(0,10,1001,'GHz')\n",
    "\n",
    "# create a Media object for RG-58, based on distributed ckt values\n",
    "rg58 = DistributedCircuit(frequency = freq,\n",
    "                          C =93.5e-12,#F/m\n",
    "                          L =273e-9,  #H/m\n",
    "                          R =0,#53e-3,   #Ohm/m\n",
    "                          G =0,       #S/m\n",
    "                          )"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Mismatched Line"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "This demonstrates  the response of a mismatched transmission line of a given length. Specifically, a line of electrical length $d$ with characteristic impedance $z_0$ is embedded in the coaxial environment (RG-58 ) with $z_0 \\approx 54 \\Omega$. The resultant S-parameters are plotted in log mag and on the smith chart. "
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Log Mag"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "def func(d=180,z0=54):\n",
    "    ntwk =rg58.line(d=d,unit='deg',z0=z0)\n",
    "    ntwk.renormalize(rg58.z0)\n",
    "    ntwk.plot_s_db(1,0)\n",
    "    ntwk.plot_s_db(0,0)\n",
    "    plt.ylim(-50,20)\n",
    "    plt.draw()\n",
    "    plt.show()\n",
    "\n",
    "interact(func, d= (0,360,10),z0=(10,200,1),embed=True);"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Smith Chart"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "\n",
    "def func(d=180,z0=54):\n",
    "    ntwk =rg58.line(d=d,unit='deg',z0=z0)\n",
    "    ntwk.renormalize(rg58.z0)\n",
    "    ntwk.plot_s_smith(1,0)\n",
    "    ntwk.plot_s_smith(0,0)\n",
    "    plt.draw()\n",
    "    plt.show()\n",
    "\n",
    "\n",
    "interact(func, d= (0,180,10),z0=(10,200,1),embed=True);"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
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