Add circles to coverage map - Antenna toolbox

Hello,

I am using the antenna toolbox to produce maps of TV coverage using the Longley-Rice model.

I would like to add circles around the antennas on the maps. These circles would represent the propagation of the signal not using the topography of the terrain.

They are just coded by a center and a radius.

Also, I am not able to save the produced maps (I am forced to do screenshots of the output). Is there a way to export the maps on any layer or an a shapefile instead of displaying it on Siteviewer?

My code is posted below.

Thank you!

data = readtable('data_antenna_PA');
data_receiver=readtable("data_receiver_PA");
max=height(data);   
pm = propagationModel('longley-rice');


 lat=transpose(data.lat_antenna);
 lon=transpose(data.lon_antenna);
 haat=transpose(data.haat);
 fq=transpose(data.freq*10^6);
 power=transpose(data.min_power);

txs = txsite(  'Latitude',lat, ...
    'Longitude',lon, ...
    'AntennaHeight', haat , ...    
    'TransmitterFrequency',fq, ... 
    'TransmitterPower', power ); 

 lat_m=transpose(data_receiver.lat);
 lon_m=transpose(data_receiver.lon);

rx = rxsite('Name', "test", ...
   'Latitude', lat_m, ...
  'Longitude', lon_m, ...
 'Antenna', design(dipole,tx.TransmitterFrequency)); 

  coverage(txs, pm,"SignalStrengths",-90:5:-5)

    show(rx)