Hobby drones use RF frequencies at 2.4 GHZ and 5.8 GHZ. If you have a good HAM radio that does DC to daylight you can just make a dipole antenna for that band and broadcast at 100 watts on whatever freq you see the needle bounce. Of course you would get a call from the FCC for doing it.
The commercially available jammers from China can be used, but then again you are breaking the law and it is a law where the FCC actually monitors to prosecute people.
Here is a copy/paste from the code on it:
Blocking & Jamming
The operation of transmitters designed to jam or block wireless communications is a violation of the Communications Act of 1934, as amended (“Act”). See 47 U.S.C. Sections 301, 302a, 333. The Act prohibits any person from willfully or maliciously interfering with the radio communications of any station licensed or authorized under the Act or operated by the U.S. government. 47 U.S.C. Section 333. The manufacture, importation, sale or offer for sale, including advertising, of devices designed to block or jam wireless transmissions is prohibited. 47 U.S.C. Section 302a(b). Parties in violation of these provisions may be subject to the penalties set out in 47 U.S.C. Sections 501-510. Fines for a first offense can range as high as $11,000 for each violation or imprisonment for up to one year, and the device used may also be seized and forfeited to the U.S. government.
Sorry to keep raining on your anti-drone parade, guys. There really is nothing you can do about these drones. Hobby drones are protected if they are in public air space and small government recon drones operate at altitudes of 8000 feet. You can’t see the government ones at that altitude. It would be like reading a camo shoe box label at over a mile.
Just get one for yourself because they would be useful for all sorts of situations and realize that anything you do outside your house or inside if your windows are not blacked out is subject to photo/video surveillance.