KH-G4-4616-1M Black Mushroom Antenna: GNSS + 4G Dual-Function Combo Antenna for IoT and Vehicle-Mounted Terminals

With the rapid adoption of IoT devices, vehicle-mounted terminals, and industrial DTUs, the demand for reliable signal reception continues to increase. Devices need to receive BeiDou/GPS satellite positioning signals reliably while maintaining stable 4G cellular data transmission. A single-function antenna can no longer fully meet the integrated design requirements of modern devices.

The Kinghelm KH-G4-4616-1M Black Mushroom Antenna is a GNSS + 4G dual-function combo antenna that integrates a GNSS positioning antenna and a 4G communication antenna into a single compact disc-shaped mushroom housing. It combines convenient installation with stable signal reception and is widely compatible with outdoor, vehicle-mounted, equipment enclosure-mounted, and other IoT terminal devices, providing equipment manufacturers with an integrated RF signal reception solution.

Kinghelm KH-G4-4616-1M Product Image

Product Overview

The Kinghelm KH-G4-4616-1M is a disc-shaped mushroom-style combo antenna featuring an integrated black plastic housing. It incorporates both a BeiDou/GPS positioning antenna and a 4G communication antenna, enabling simultaneous reception of positioning and cellular communication signals.

The antenna is supplied with a 46 × 16 mm red 3M adhesive pad, together with screw and nut accessories. It supports two installation methods: adhesive mounting and panel mounting through a drilled hole with a screw and nut. This makes it suitable for a variety of applications, including industrial equipment, vehicle housings, and IoT devices.

The antenna uses RG1.78 brown coaxial cable and is terminated with an SMAJ connector, allowing direct connection to RF ports on mainboards, DTUs, positioning modules, and other devices. The complete antenna weighs only 58.6 g gross, and its lightweight design adds minimal load to the equipment housing.

The product is packaged in individual bags, making it convenient for bulk storage, project procurement, and shipment. It is an ideal external antenna accessory for industrial IoT, vehicle monitoring, and intelligent security terminals.

Key Electrical Characteristics

The KH-G4-4616-1M mushroom antenna supports dual-band operation and covers two major signal ranges:

• 4G cellular communication: 700–960 MHz and 1710–2690 MHz

• GNSS positioning: 1575 ± 3 MHz

This frequency coverage makes the antenna compatible with mainstream satellite navigation systems such as GPS and BeiDou.

In terms of electrical performance, the antenna features:

• Return Loss: ≤ -6.0 dB

• Maximum VSWR: 3.5:1

• Peak Gain: up to 2.0 dB

Stable VSWR performance helps reduce RF reflection losses and minimize wasted signal power. With a peak gain of 2.0 dB, the antenna can improve signal reception in relatively weak-signal environments. Even in challenging scenarios such as urban areas with building obstructions or enclosed vehicle housings, it can continue to receive satellite positioning and cellular network signals.

The RG1.78 coaxial cable offers good flexibility and bending resistance. It is suitable for routing inside equipment and along device housings, reducing the risk of cable cracking or conductor damage during installation and helping maintain long-term RF transmission stability.

The SMAJ standard RF connector offers broad compatibility. Most 4G DTUs, BeiDou positioning modules, and vehicle-mounted terminals equipped with SMA interfaces can be connected directly, reducing the need for additional adapters and lowering component selection and integration costs.

Core Product Advantages

1. Integrated Two-in-One Design Saves Equipment Space

The 4G communication antenna and GNSS positioning antenna are integrated into a single mushroom-shaped housing. Equipment manufacturers do not need to reserve two separate antenna openings on the enclosure, which can simplify mechanical design, reduce tooling and mold development costs, and help minimize the overall size of the terminal.

This design is particularly suitable for compact IoT terminals where installation space is limited.

2. Dual Installation Methods for Flexible Application

The product includes a red 3M adhesive pad as well as screw and nut mounting accessories, providing two installation options.

For temporary testing and rapid installation, the antenna can be attached using the adhesive pad. For long-term industrial or vehicle-mounted applications, through-hole mounting with a nut provides a more secure mechanical connection, helping prevent loosening under vibration and vehicle movement.

This design combines installation convenience with mechanical reliability.

3. Compact and Lightweight Structure for Easy Integration

With a gross weight of only 58.6 g, the antenna has minimal impact on the overall weight of the equipment.

The black plastic mushroom-style housing provides a compact and robust structure that can withstand minor impacts and offers basic protection against dust in outdoor applications. Its neat disc-shaped appearance does not protrude excessively from the equipment surface, helping reduce the risk of accidental impact and damage.

4. Standardized Connector and Cable for Easier Integration

The SMAJ connector is a commonly used RF interface, while the compact RG1.78 coaxial cable provides flexible routing options.

During product development, engineers can generally connect the antenna directly to compatible RF interfaces without designing additional adapter cables. This simplifies assembly, lowers integration costs, and helps shorten the product development cycle.

The antenna is particularly suitable for high-volume IoT and industrial projects.

5. Kinghelm Quality Control and Stable Supply

Kinghelm specializes in the R&D and manufacturing of RF connectors, antennas, and related interconnect products.

The KH-G4-4616-1M mushroom antenna undergoes RF performance sampling inspections before shipment. Its individual-bag packaging is suitable for bulk inventory management and project delivery, while Kinghelm's production capabilities support stable supply for large-scale IoT and vehicle-mounted applications.

Kinghelm KH-G4-4616-1M Specification Sheet

Typical Applications

Vehicle-Mounted IoT Terminals

Applications include ride-hailing positioning terminals, GPS monitoring systems for freight vehicles, and vehicle-mounted video recorders. The antenna can simultaneously provide vehicle positioning and 4G network connectivity for transmitting vehicle status, video, and other data.

Industrial IoT DTUs

Suitable for outdoor remote data acquisition gateways, water-resource monitoring systems, power monitoring terminals, and other industrial devices requiring both positioning and wireless data transmission in remote environments.

Intelligent Security Devices

Applications include outdoor security cameras and intelligent access-control terminals, enabling device location reporting together with 4G wireless data transmission.

Smart Warehousing and Asset Tracking

Suitable for logistics asset tracking devices, container monitoring terminals, and other applications requiring remote asset positioning and real-time status reporting.

Construction and Agricultural Machinery

Suitable for excavators, agricultural machinery, and other heavy equipment to provide equipment positioning and remote transmission of operating-condition data.

Installation and Usage Precautions

1. Install the antenna in an open, unobstructed location. Avoid installing it near large metal objects or under extensive metal shielding. Metal enclosures can significantly weaken GNSS and 4G signals, reducing positioning accuracy and network stability.

2. Control the tightening force when using through-hole mounting. Excessive tightening may damage or crack the plastic antenna housing. Before applying the 3M adhesive pad, clean the mounting surface and make sure it is dry and free of oil, dust, and other contaminants to ensure reliable adhesion.

3. Avoid sharp bending, excessive compression, or pulling of the RG1.78 cable. Improper cable handling may damage the internal conductor and cause RF performance degradation.

4. Connect the SMAJ connector carefully. Align the connector threads before tightening and screw it in smoothly. Do not force or cross-thread the connector, as this may damage the center pin and affect RF connection performance.

5. The antenna housing is made of plastic and is not intended for long-term immersion in water. For high-humidity or demanding outdoor applications, additional enclosure or environmental protection measures are recommended.
   
   

Product Summary

The Kinghelm KH-G4-4616-1M Black GNSS + 4G Combo Mushroom Antenna integrates 4G cellular communication and GNSS satellite positioning into a single compact antenna, addressing the two major wireless requirements of modern IoT terminals within limited equipment space.

With 2.0 dB peak gain, coverage of mainstream 4G frequency bands and the 1575 MHz GNSS band, an SMAJ standard connector, and a flexible RG1.78 coaxial cable, the antenna supports both adhesive mounting and screw-and-nut mounting. It offers a practical balance of RF performance, cost efficiency, installation flexibility, and system integration.

Whether used in vehicle monitoring, industrial DTUs, asset tracking, or outdoor intelligent terminals, the KH-G4-4616-1M can serve as a reliable external RF antenna solution.

As a domestic RF component manufacturer, Kinghelm provides comprehensive control over the entire process, from antenna structural design to electrical performance testing. The company is committed to providing one-stop antenna selection and supporting solutions for customers in the IoT industry, helping wireless terminal products move efficiently from development to mass production.

About Kinghelm

Kinghelm, led by Song Shiqiang, has been deeply engaged in the RF and connector industry, with a product portfolio covering Type-C, SMA, IPEX, MCX, HDMI connectors, automotive wiring harnesses, adapter cables, pin headers, terminals, RF cables, antennas, GPS antennas, RF coaxial connectors, Wi-Fi antennas, BeiDou antennas, internal antennas, 4G antennas, ceramic antennas, and other RF connector products.

Popular models include KH-IPEX-K501-29, KH-SMA-K513-G, KH-TYPE-C-16P, KH-SMA-KE-Z, and KH-SMA-KWE17-G. Kinghelm can provide complete connector and antenna solutions for IoT, vehicle communication, satellite positioning, and other wireless communication projects.

Kinghelm Official Website: www.kinghelm.net

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