vlg 3G Antenna

　　I. Core Product System

　　VLG 3G antennas are centered on "multi-form adaptability + full-scenario coverage," and are mainly divided into two categories:

　　Built-in Integrated Antennas

　　Forms: FPC flexible antenna, PCB rigid antenna, spring antenna, LDS laser-engraved antenna, etc.

　　Frequency Bands: Covers mainstream 3G frequency bands (820-960MHz, 1710-2170MHz), compatible with 2G/4G multi-mode communication

　　Typical Applications: POS machines, smart water/electricity meters, locators, smartwatches, and other small IoT devices

　　External High-Performance Antennas

　　Forms: Glue rod antenna, fiberglass antenna (high gain version)

　　Key Parameters: Gain 3-8dBi, impedance 50Ω, supports N-type/SMA type connectors, some models have IP67 waterproof rating

　　Typical Applications: Outdoor base stations, vehicle terminals, CPE devices, and other scenarios with strong signal requirements

　　Combined Antenna Solutions

　　For example, 3-in-1 vehicle antenna (3G + Bluetooth + GPS), 5-in-1 Intelligent terminal antenna (3G/4G + Wi-Fi + GNSS), integrating multiple communication modules into a compact housing.

　　II. Core Technical Features

　　Wideband Compatibility: Supports full-band customization from 100MHz to 8000MHz, adapting to mainstream global 3G operator standards (such as Verizon, Vodafone, SoftBank, etc.).

　　Precise Performance Optimization:

　　3D modeling and simulation: Simulates signal transmission based on the overall structure, proactively avoiding layout interference.

　　Full-process testing: Provides passive parameter (VSWR, gain) and active OTA testing to ensure signal stability.

　　Anti-interference design: Solves electromagnetic interference (EMC) issues between the antenna and the motherboard.

　　Scenario-specific adaptation:

　　Industrial grade: Designed for narrow spaces in devices such as water meters and smoke detectors, supporting a wide operating temperature range of -40℃ to 85℃.

　　Automotive grade: Employs left-hand circular polarization technology to ensure signal continuity in mobile scenarios (such as dual-band satellite + 3G combined antenna).

　　III. Customized Services and Case Studies

　　Customization Process: Needs Assessment (Frequency Band/Size/Environment) → 3D Simulation Modeling → Sample Testing → Mass Production Optimization; cycle time can be compressed to 2-4 weeks.

　　Key Clients: Serving companies such as ZTE, Hikvision, Quectel, and Siemens; products are certified by operators such as ATT and Orange.

　　IV. Selection Recommendations

　　Small IoT Terminal Scenarios: We recommend using FPC/PCB built-in antennas. Key considerations are size ≤50mm and low power consumption to suit compact installation spaces and energy-saving requirements.

　　Outdoor Fixed Equipment Scenarios: We recommend using external fiber optic antennas. Key considerations are gain ≥5dBi and IP65 protection rating to ensure signal strength and equipment durability in complex outdoor environments.

　　Vehicle-Mounted Smart Terminal Scenarios: We recommend using 3G+GNSS combined antennas. Key considerations are vibration resistance and multi-band integration to meet signal stability and multi-functionality requirements in vehicle environments.