Combination Antennas for Multi Band Wireless Connectivity and Space Saving Integration

What Is a Combination Antenna?

As wireless devices become more connected, a single piece of equipment may need to support several communication and positioning technologies at the same time. Cellular connectivity may handle data transmission, GNSS may provide positioning, while Wi-Fi can support local wireless networking.

Installing a separate antenna for every wireless function can increase installation complexity and consume valuable device space.

A combination antenna, also known as a combo antenna or multi-function antenna, integrates multiple antenna elements into a single housing. This allows several wireless functions to be supported through one compact antenna assembly.

BAT Wireless Combination Antennas can support different combinations of Cellular, GNSS, Wi-Fi and other wireless technologies according to application and integration requirements.

Why Use a Combination Antenna?

The main advantage of a combination antenna is integration.

Modern IoT and connected equipment often has limited space available for antenna installation. Using multiple independent external antennas can require additional mounting locations, cables and mechanical components.

A combination antenna can consolidate multiple wireless functions into one structure.

Depending on the configuration, this can provide several practical benefits:

• Multi-band frequency coverage
• Multiple wireless functions in one antenna housing
• Reduced number of external antenna installations
• More efficient use of available device space
• Simplified mechanical integration
• Flexible cable and connector configurations

These characteristics make combination antennas particularly useful for equipment requiring both wireless communication and positioning.

Cellular and GNSS Combination Antennas

One common configuration combines Cellular and GNSS antennas.

Cellular connectivity can provide wireless data communication through technologies such as 4G LTE or 5G, while GNSS provides satellite-based positioning.

This combination can be useful for equipment that needs to transmit data while simultaneously determining its location.

Potential applications include vehicle terminals, fleet equipment, industrial IoT systems, asset monitoring devices and other connected equipment.

For example, a 4G/GNSS combination antenna can provide separate RF connections for cellular communication and satellite positioning while integrating the antenna elements into a common housing.

Cellular GNSS and Wi-Fi Integration

Some connected systems require more than two wireless functions.

A combination antenna may integrate Cellular, GNSS and Wi-Fi into one antenna assembly, depending on the project requirements.

In this type of system:

Cellular can provide wide-area network connectivity.

GNSS can provide positioning and navigation information.

Wi-Fi can provide local wireless network connectivity.

Integrating these functions into a single antenna assembly can be useful for gateways, vehicle equipment and industrial communication devices where installation space is limited.

The specific antenna configuration should be selected according to the actual wireless modules, frequency bands and mechanical structure of the device.

Combination Antennas for Industrial IoT

Industrial IoT equipment often needs reliable connectivity in environments where installation conditions are more complex than typical indoor electronics.

Gateways, monitoring terminals and industrial controllers may require cellular communication together with positioning or local wireless connectivity.

A multi-band combination antenna can provide a practical integration option by reducing the number of separate antenna housings installed on the equipment.

However, antenna selection should consider the complete installation environment, including nearby metal structures, enclosure materials, mounting position and cable routing.

Combination Antennas for Vehicle Terminals

Vehicle-related equipment is another important application for combination antennas.

A connected vehicle terminal may require cellular communication for data transmission, GNSS for positioning and Wi-Fi for local connectivity.

Installing multiple antennas separately can increase the number of mounting points required on the vehicle or terminal.

A Cellular GNSS Wi-Fi combination antenna can integrate several antenna elements into one housing while providing individual cables and RF connectors for different wireless modules.

This approach can help create a cleaner and more manageable installation.

How Do Combination Antennas Connect to Multiple RF Modules?

Although several antenna functions may share one external housing, each antenna element can use its own RF cable and connector.

For example, a combination antenna might include separate connections labeled for functions such as:

• 4G or 5G
• GPS/GNSS
• Wi-Fi

Each cable is then connected to the corresponding RF interface inside the equipment.

Cable length and connector type can also be selected according to device architecture and installation requirements.

Common RF connector requirements can vary significantly between applications, making cable and connector customization an important consideration when selecting a combination antenna.

What Should You Consider When Choosing a Combination Antenna?

Choosing the right combination antenna requires more than identifying the number of wireless functions.

Frequency Requirements

Start by identifying every wireless technology and frequency band the device needs to support. Cellular frequency requirements can vary by region and network operator.

Wireless Functions

Determine which technologies need to be integrated. A project might require Cellular + GNSS, Cellular + Wi-Fi, or Cellular + GNSS + Wi-Fi.

Installation Environment

Consider where the antenna will be mounted and whether the surrounding structure contains metal or other materials that may affect RF performance.

Cable and Connector Configuration

Each antenna function may require a different cable length or RF connector depending on the corresponding wireless module.

Antenna Isolation

When multiple antenna elements operate within one compact structure, interaction between antenna systems needs to be considered. Proper antenna design and RF evaluation are therefore important.

Mechanical Requirements

Housing dimensions, mounting method, environmental exposure and available installation space should also be considered during antenna selection.

Custom Combination Antenna Solutions from BAT Wireless

Different connected products have different RF architectures, which means a standard combination antenna may not always match every project.

BAT Wireless provides combination antenna solutions for applications requiring multiple wireless technologies within one antenna assembly.

Depending on project requirements, customization can involve:

• Frequency band combinations
• Cellular, GNSS and Wi-Fi configurations
• Antenna structure
• Cable lengths
• RF connector types
• Mounting and installation requirements

BAT Wireless can also support antenna selection and RF evaluation according to specific device and application requirements.

Simplify Multi Wireless Integration with the Right Antenna

As connected devices incorporate more communication and positioning technologies, antenna integration becomes an increasingly important part of product design.

A well-selected multi-band combination antenna can bring Cellular, GNSS, Wi-Fi and other wireless functions into a compact antenna solution, helping reduce installation complexity and make more efficient use of available space.

For industrial IoT equipment, gateways, vehicle terminals, surveillance systems and other connected devices, the appropriate combination antenna should be selected according to frequency bands, wireless functions, mechanical structure and actual operating environment.

BAT Wireless provides standard and customized combination antenna solutions to support different multi-wireless integration requirements.