Counter-drone systems detect and locate unauthorized drones and, where the law allows, disrupt their control and navigation links. Castro Defense supplies, under its own name and on a quote-only basis, equipment from a partner manufacturer. Detection systems are passive and available to companies and individuals; jamming and GNSS spoofing equipment is offered only to authorities empowered by law. We serve clients across Mexico, and every sale follows Mexican law.
What threats do unauthorized drones pose?
- Contraband delivery. A small drone can fly over a perimeter wall and drop prohibited items, such as phones or drugs, inside a prison.
- Surveillance. An onboard camera can record entrances, routines, staff and weak points of a facility without coming near the fence.
- Attacks on critical sites. A drone can be used to carry a payload toward energy, water or transport facilities, or toward crowded events.
- Aviation risk. This is why Mexico’s aviation rules set minimum distances from aerodromes and heliports (NOM-107-SCT3-2019).
Protecting a facility starts with knowing what is happening in its airspace. What can be done next depends on what the law allows each operator to do.
How do detection, jamming and GNSS spoofing differ?
The three technologies answer different questions and carry different legal consequences. They are described here at a conceptual level only.
Detection and positioning
Radio-frequency detectors analyze the spectrum to identify the signals exchanged between a drone and its remote controller. They raise an alert and, depending on the equipment, estimate the direction or position of the aircraft and, in some cases, of the pilot. Passive detection does not emit signals or interfere with other communications. Because passive detectors only receive, companies and individuals can acquire them to protect their sites without the authorization that jammers require. They must be used only to detect and locate aircraft: intercepting the content of private communications is a crime (Federal Criminal Code, art. 177).
Jamming
A jammer emits radio-frequency energy in the bands a drone uses for control, video or satellite navigation in order to disrupt those links. How the drone reacts depends on its programming: it may hover, land or try to return to its launch point. Because the emission affects any equipment operating in those bands, its use is restricted by law.
GNSS spoofing
Global navigation satellite systems (GNSS), such as GPS, tell a drone where it is. Spoofing transmits signals that imitate satellite signals so the receiver calculates a false position. It is a specialized technique that can also affect other nearby receivers.
| Technology | What it does | Emits signals? | Offered to |
|---|---|---|---|
| Detection and positioning | Identifies and locates drones and, where possible, the pilot | No, if passive | Companies, individuals and agencies |
| Jamming | Disrupts control, video or navigation links | Yes | Only authorities within the exceptions of LMTR art. 184 |
| GNSS spoofing | Makes the drone calculate a false position | Yes | Only agencies with the legal authorization to operate it |
What does Mexican law say about jammers?
The Telecommunications and Broadcasting Law (Ley en Materia de Telecomunicaciones y Radiodifusión, LMTR), published in the Diario Oficial de la Federación on July 16, 2025, prohibits manufacturing, selling, acquiring, installing, carrying, using and operating equipment that blocks, cancels or nullifies cellular, radio, data or image signals (art. 184). There are two exceptions: the authorities running prisons, penitentiaries and juvenile detention centers, and federal public security and national security bodies acting within their powers.
The same law requires telecom concession holders to permanently cancel signals inside prison perimeters (art. 183, section VIII). And the Federal Criminal Code punishes with prison anyone who manufactures, sells, acquires, installs, carries, uses or operates this equipment outside the legal exceptions (art. 168 ter). Foreign buyers should note that holding an authorization in another country does not create an exception under Mexican law.
That is why Castro Defense verifies each client’s authorization before quoting, and offers jamming and spoofing equipment only to buyers who demonstrate that they fall within the legal exceptions. Nothing on this site is an open offer of this equipment.
Product lines
The catalog is organized in five lines: drone jammers (portable, vehicle-mounted, fixed and integrated detection-and-jamming systems, plus GNSS spoofing); detection and positioning (fixed, portable and handheld detectors, and positioning systems); communication jammers for prison and security authorities; modules; and antennas and accessories. The catalog is for information only and shows no prices.
Drone jammers
Authorities- Access
- Authorized authorities only
- Pricing
- On request
Detection & positioning
Public- Access
- Companies and individuals
- Pricing
- On request
Communication jammers
Authorities- Access
- Authorized authorities only
- Pricing
- On request
Modules
Authorities- Access
- Authorized authorities only
- Pricing
- On request
Antennas & accessories
Public- Access
- Companies and individuals
- Pricing
- On request
Services around the equipment
A counter-drone project does not end with delivery. Depending on the case, it may call for a site survey to define coverage and sensor placement, installation and integration with other security systems, operator training and maintenance.
- Services Castro Defense provides: confirm site survey, installation, operator training and maintenance
- Delivery times and warranty: delivery times and warranty
For teams that also fly their own drones, Castro Defense offers drone pilot training. And when a drone incident has to be documented as evidence, digital forensics preserves logs and files with chain of custody.
How to request a quote
- Request. Send your agency’s or company’s details, the type of facility and what you need through our quote page.
- Verification. For jamming or spoofing equipment, we check that the requester is legally empowered to acquire and operate it; detection systems do not require this check.
- Technical definition. The threat, the area to be covered and the site conditions are defined.
- Formal quote. Issued in writing; any sale is subject to the corresponding authorization.
Next step
Request a quote
Confidential proposal, no commitment.
Jamming and spoofing equipment is offered only to authorities empowered by law; passive detection systems are available to companies and individuals. In Mexico, equipment that blocks or cancels radio signals is prohibited except in the cases provided by law. The catalog is for information only and shows no prices.
Official sources
- Telecommunications and Broadcasting Law (Ley en Materia de Telecomunicaciones y Radiodifusión), arts. 183, section VIII, and 184. Chamber of Deputies, current text, published July 16, 2025 (Spanish).
- Federal Criminal Code (Código Penal Federal), art. 168 ter. Chamber of Deputies, current text (Spanish).
- NOM-107-SCT3-2019, requirements for operating an RPAS in Mexican airspace. Diario Oficial de la Federación, November 14, 2019 (Spanish).
Frequently asked questions
Are drone jammers legal in Mexico?
Only within the exceptions set by law. Mexico's Telecommunications and Broadcasting Law prohibits manufacturing, selling, acquiring, installing, carrying, using or operating equipment that blocks, cancels or nullifies cellular, radio, data or image signals. The exceptions are prison authorities and federal public security and national security bodies acting within their powers (art. 184); outside them, the Federal Criminal Code punishes these acts with prison (art. 168 ter).
What is the difference between detecting and jamming a drone?
Detection identifies and locates a drone, usually by analyzing the radio signals between the aircraft and its controller, without interfering with them. Jamming emits radio-frequency energy to disrupt those links, so it also affects other equipment using the same bands and is restricted by law.
Who can request a counter-drone quote from Castro Defense?
Passive detection systems are available to companies, individuals and agencies. Jamming and spoofing equipment is offered only to authorities within the legal exceptions, after verification.
Why are there no prices on the site?
Each project depends on the site, the threat, the coverage required and the client's legal framework. The catalog is for information only, and prices are provided only in a formal quote.