Here are the cheap counter-drone solutions DoD tested in the Arizona desert
Top five counter-drone technologies - Geospatial World
Counter Drone Services
Citadel Defense Expands Counter Drone Capabilities | Business Wire
D-Fend's Core Concepts for Counter-Drone Continuity
Counter-Drone Solutions | Ondas Holdings
Talking Counter-Drone Solutions at ISS World Europe in Prague! -
Integrated Counter Uav Jamming Solution for Airportsto Detect and Classify Drones - China Uav Finder, Drone Detection and Defense System | Made-in-China.com
Counter Drone Technology | Wynyard Group | Solutions
C-UAS Solution | Defense & Electronic Systems | Toshiba Infrastructure Systems & Solutions
Counter Drone Automated Solution with Integrated RF or Radar Detection, Infrared Thermal Camera for Trakcing and RF Jamming - China Drone Jammer, Detector | Made-in-China.com