Magnetic chuck antenna China supplier

Magnetic Suction Cup Antenna Technology Analysis and Application Guide
én. Definition and Working Principle
Magnetic suction cup antenna is a small wireless device fixed by magnetic adsorption, combining magnetic materials and radio frequency technology to achieve signal reception and transmission. Its core components include magnetic rods (manganese zinc/nickel zinc ferrite) and winding coils, which use electromagnetic induction to separate electromagnetic waves in space, and improve signal reception efficiency through the synergy of magnetic permeability and dielectric constant. The bottom magnetic suction design allows it to be quickly fixed on metal surfaces (such as vehicle housings or base station equipment), simplifying the installation process.

OMB.915.B03F21 915MHz, Straight RF Antenna

Magnetic straw antenna connection assembly

7dbi high gain wifi antenna with cable and magnetic base

Funkció:
Signal Reception/Transmission:
Antennas are essential for transmitting and receiving radio waves. A transmitting antenna converts electrical signals into radio waves, while a receiving antenna converts radio waves back into electrical signals.

Magnetic Mounting:
The magnetic base provides a strong and secure attachment to metal surfaces. The suction cup allows for attachment to non-metal surfaces, expanding the antenna’s placement options.
Omnidirectional or Directional:
Some antennas, like the omnidirectional antenna, can receive signals from all directions, while others are designed for specific directional reception.
High Gain:
High gain antennas are designed to improve signal reception and transmission by concentrating the signal in a specific direction.

II. Typical structure and design features
‌Core components‌
‌Magnetic tether plate‌: built-in strong magnetic material (such as neodymium iron boron), which fixes the antenna body by magnetic adsorption.
‌Soft gel cone plate‌: wrapped with magnetic tether plate, providing anti-vibration buffer and preventing metal surface scratches.
‌Radiator‌: common copper rod or whip antenna, low ohm loss design to ensure high-frequency signal transmission efficiency

‌Expanded interface‌
Supports SMA interface coaxial cable connection, compatible with wireless modules (such as data transmission radio, WiFi/Bluetooth devices), and some models integrate waterproof connectors to enhance outdoor durability58.

III.. Classification and performance characteristics
‌Ordinary whip suction cup antenna‌: lightweight design, gain 5-8dBi, low cost, used for short-distance communication such as smart meter reading, express cabinets, stb.
‌Copper rod suction cup antenna‌: broadband coverage (700-3700MHz), gain up to 13dBi, strong anti-interference, used for industrial data transmission, vehicle-mounted radio medium and long-distance communication.
‌Dual-band suction cup antenna‌: supports 2.4G/5.8G dual-band, the magnetic base can be rotated to adjust the angle, and is compatible with multi-protocol devices (such as WiFi 6 routers) mobile hotspots and remote monitoring.

Production:
1. Antenna Element:
The antenna’s conductive element (e.g., a whip, dipole, or monopole) is typically made of copper or other suitable conductive material.
2. Magnetic Base:
A strong magnet is incorporated into the base, often encased in a durable material like steel or PVC.
3. Suction Cup:
The suction cup, made of rubber or other flexible material, creates a vacuum when pressed against a surface, providing a secure attachment.
4. Csatlakozó:
The antenna is connected to a device (e.g., a radio, receiver) through a connector, like an SMA connector or a BNC connector.
5. Quality Control:
The antenna is tested for its ability to transmit and receive signals effectively, with measures like VSWR (voltage standing wave ratio) being checked.
Materials:
Antenna Element: Copper wire, metal rods, or other conductive materials.
Magnetic Base: Steel, PVC, or other durable materials containing a strong magnet.
Suction Cup: Rubber, PVC, or other flexible materials that can create a vacuum.
Csatlakozó: Metal connectors (SMA, BNC) to interface with devices.

Iv.. Typical application scenarios
‌In-vehicle communication‌
Use the magnetic base to quickly install on the roof, and cooperate with the data transmission radio to realize fleet dispatch or emergency communication78. ‌Smart Internet of Things‌
Connect wireless modules (such as LoRa/Zigbee) for remote data transmission of devices such as vending machines and water meters.
‌Base station expansion‌
Magnetic installation on the base station housing to enhance signal coverage and reduce wiring complexity (such as V1.2.2 base station solution).

Car Radios:
Magnetic antennas are commonly used in cars for AM/FM radio reception, providing flexibility in antenna placement.
Wireless Communication:
Used in various devices like water pumps, remote controls, security cameras, and more.
Ham Radio:
Used for amateur radio communication, offering convenient mounting options.
Professional Applications:
Employed in professional radio communication systems, offering easy installation and flexibility.

450MHz ~ 470MHz 5.14dbi NMO magnetic straight RF antenna

Straight RF antenna 5.14dbi magnetic antenna

Magnetic chuck antenna for SMA connector

V. Installation and use precautions
‌Adsorption surface requirements‌
Must be fixed on a ferromagnetic metal plane (such as a steel plate) to avoid unstable adsorption caused by non-metal or curved surfaces.
‌Signal optimization‌
Adjust the antenna angle to be perpendicular to the ground and maximize the coverage using omnidirectional radiation characteristics.
Stay away from strong interference sources such as high-voltage lines or motors, and use shielded cables to reduce noise when necessary.
‌Maintenance points‌
Clean the rust on the surface of the magnetic suction cup regularly to prevent magnetic attenuation.
For outdoor deployment, waterproof models (IP67 level) are preferred.

VI. Selection recommendations
‌Band matching‌: Select the frequency band according to the protocol requirements (such as 2.4G Zigbee or 700MHz LTE-M).
‌Gain and distance‌: 8-10dBi gain is recommended in urban areas, and 13dBi or above models are optional in open areas.
‌Scalability‌: Antennas with SMA plug-in interfaces are preferred to facilitate later upgrades of high-gain components.
Magnetic suction cup antennas have become key components in the fields of automotive and industrial Internet of Things due to their advantages such as rapid deployment and high compatibility. When selecting a model, it is necessary to combine the scene requirements with a comprehensive assessment of the electromagnetic environment.