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    "# Interactive Matching System\n",
    "This example illustrate a matching system made of an open stub in series with a delay load. The length of both transmission lines can be tuned, with a direct view of the resulting Smith chart. "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "%matplotlib inline\n",
    "\n",
    "import matplotlib.pyplot as plt\n",
    "from ipywidgets import interact\n",
    "\n",
    "import skrf as rf\n",
    "from skrf.frequency import Frequency\n",
    "from skrf.media import DistributedCircuit\n",
    "\n",
    "rf.stylely()\n",
    "# define a frequency object\n",
    "freq = Frequency(0.01, 10, 201, '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",
    "                          I =273e-9,  #H/m\n",
    "                          R =0,#53e-3,   #Ohm/m\n",
    "                          G =0,       #S/m\n",
    "                          z0_port = 50\n",
    "                          )\n",
    "\n",
    "\n",
    "load = rg58.load(.5)\n",
    "def func(d1=180, d2=180):\n",
    "    l1 = rg58.line(d=d1, unit='deg')\n",
    "    l2 = rg58.shunt_delay_open(d=d2, unit='deg')\n",
    "    ntwk = l2**l1**load\n",
    "    ntwk.plot_s_smith(0,0)\n",
    "    plt.draw()\n",
    "    plt.show()\n",
    "\n",
    "a=interact(func, d1= (0,360,10),d2= (0,360,10),embed=True);"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
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