vlg 4G Antenna

　　I. Core Product Categories (Focusing on 4G Scenario Adaptation)

　　VLG 4G antennas are centered on "full LTE band compatibility + multi-form deployment," addressing the 4G communication needs of consumer, industrial, and outdoor/vehicle scenarios (emphasizing stable transmission and cost adaptation). They are divided into three main categories:

　　Built-in Miniature 4G Antenna

　　Form Features: Utilizes FPC flexible antenna, LDS laser-engraved antenna (thickness ≤0.3mm), and miniature PCB antenna, adaptable to narrow internal spaces (installation area ≤12cm²), supports SMT surface mounting, and can be seamlessly integrated with 4G modules (such as Quectel EC20 and ZTE MC801A).

　　Frequency Band Coverage: LTE full band (700MHz, 800MHz, 900MHz, 1800MHz, 2100MHz, 2600MHz), compatible with... 2G (GSM)/3G (WCDMA) bands (backward compatible, ensuring signal strength in remote areas)

　　Key parameters: Gain 2-5dBi, Impedance 50Ω, VSWR ≤1.6 (full band), Insertion loss ≤1.0dB, Operating temperature -20℃~70℃ (consumer grade)/-30℃~80℃ (industrial grade), Power consumption ≤0.12W

　　Typical applications: IoT terminals (smart water/electricity meters, smoke detectors, requiring low-power remote meter reading), vehicle central control (hidden PCB 4G antenna, adaptable to interior space), VLG AI plush toys (built-in FPC 4G antenna, supporting remote voice control for parents and children), portable monitoring devices (such as environmental monitoring instruments, compact size)

　　External high-performance 4G antenna

　　Form characteristics: Includes rubber rod antenna (length 12-20cm), fiberglass antenna (diameter 8-12mm), planar directional antenna (size...) 60×100mm), supports N-type/SMA-type/TNC-type connectors, some models come with magnetic/wall-mounted bases (for easy and quick outdoor mounting).

　　Frequency Band Coverage: LTE full-band (supports carrier aggregation, such as 1800MHz+2600MHz dual-band collaboration to improve speed), compatible with 3G WCDMA bands (ensuring transitional scenarios).

　　Key Parameters: Gain 5-15dBi (directional flat panel antenna gain up to 18dBi), shielding effectiveness ≥60dB (aluminum foil + tinned copper braided mesh double-layer shielding), protection rating IP65 (consumer-grade outdoor)/IP67 (industrial-grade outdoor), UV aging resistance (complies with ISO 4892-3 standard, performance degradation ≤5% after 1500 hours of exposure).

　　Typical Applications: Outdoor 4G CPE (network coverage in rural/remote areas, achieving "4G to WiFi"), industrial 4G gateway (signal extension in factory workshops, connecting CNC machine tools/ Sensors), vehicle-mounted 4G terminals (roof-mounted external rubber rod antenna, vibration resistant and compliant with ISO 16750-3 standard), security monitoring equipment (outdoor camera accessories, ensuring stable video transmission)

　　Combined 4G Antenna Solution

　　Integration Logic: Integrates 4G with multiple communication modules, reducing equipment wiring and space occupation, meeting the requirements of "low cost + multi-functionality". Common combination forms include:

　　"4G + WiFi 5 + GNSS" three-in-one antenna (suitable for vehicle navigation terminals and outdoor portable devices, supporting 4G networking + WiFi LAN + positioning);

　　"4G + Bluetooth 5.0 + 2G" dual-mode antenna (dedicated to IoT terminals, 4G primary / 2G backup, avoiding connection drops in remote areas);

　　"Multi-unit 4G array antenna" (4-8 units integrated, used for enterprise-level 4G APs, increasing concurrent user count by 200%, suitable for small and medium-sized offices)

　　Structural Features: Adopts integrated design ABS/PC alloy shell (lightweight design), centralized interface (single interface enables multi-module signal transmission), weight ≤50g (consumer grade) / ≤250g (industrial grade)

　　II. Core Technical Features (Based on VLG 4G Hardware Capabilities)

　　Broadband Compatibility and Stable Transmission

　　Full LTE Band Adaptation: Achieves full band coverage of 700-2600MHz through "multi-cavity design," adapting to major global 4G operators (such as China Mobile, Verizon, Vodafone), without requiring antenna model adjustments based on region; supports carrier aggregation (CA), with peak rates reaching 300Mbps (downlink) / 50Mbps (uplink), meeting the needs of high-definition video backhaul.

　　Weak Signal Enhancement: Built-in "signal gain adaptive algorithm" automatically improves receiver sensitivity (increases by 10-15dB) in weak signal areas (such as basements and rural areas), reducing disconnection rate to ≤0.8%/day (far lower than the industry average). 1.5%)

　　Interference Resistance and Environmental Adaptability

　　Interference Shielding: Targeting common interference in the 4G band (such as 2.4G WiFi and microwave oven signals), it employs "fixed filtering + impedance fine-tuning" technology, achieving an interference suppression ratio ≥40dB and a transmission error rate ≤0.001% (ensuring data integrity).

　　Extreme Environment Adaptability:

　　Industrial Grade Model: Temperature resistant -40℃~85℃, salt spray resistant (800 hours, 5% NaCl concentration), vibration resistant (10-2000Hz, 15G acceleration), suitable for mining, smart agriculture (outdoor sensors), and other scenarios;

　　Outdoor Model: IP67 waterproof and dustproof (immersion in 1 meter of water for 30 minutes without failure), high and low temperature cycling resistant (-30℃~75℃, 150 cycles), wind resistance (wind speed ≤40m/s, fixed without offset), suitable for 4G in remote areas. Coverage;

　　Vehicle-mounted model: Oil and chemical corrosion resistant (compliant with ISO 19642 standard), electromagnetic interference resistant (EMC compliant with CISPR 25 Class 4), adaptable to the complex electromagnetic environment of vehicles in motion.

　　Low cost and multi-hardware synergy

　　Optimized cost-effectiveness: Compared to 5G antennas, 4G antennas reduce costs by 30-40% in materials (no need for millimeter-wave dedicated substrates) and processes (simplified frequency band design), making them suitable for scenarios with low speed requirements (such as remote meter reading and simple monitoring);

　　Module synergy: Compatible with VLG 4G modules (such as Quectel EC20-E and ZTE MC801A compatible models) and standard FPC harnesses (0.1mm²), signal transmission loss ≤3dB (10-meter distance), supports integrated debugging of "antenna-module-harness", shortening the integration cycle to 1.5 weeks (traditional solutions require 2-3 weeks), reducing customer development costs.

　　III. Typical application scenarios (combined with...) VLG Customer and Product Ecosystem

　　Consumer IoT and Portable Scenarios

　　Representative Products: Smart water/electricity meters (built-in micro PCB 4G antenna, low-power design, standby time ≥1 year, supports monthly remote meter reading), VLG AI plush toys (built-in FPC 4G antenna, supports two-way parent-child voice communication, latency ≤100ms), portable 4G routers (built-in LDS 4G antenna, weight ≤80g, suitable for outdoor camping and temporary office use)

　　Core Requirements: Low power consumption (standby power consumption ≤60μA), small size (installation area ≤10cm²), low cost (suitable for batch IoT devices), dual-mode compatibility (4G+2G, avoiding disconnection when there is no 4G signal)

　　Industrial IoT (IIoT) Scenarios

　　Representative Products: Industrial 4G gateway (external fiberglass 4G antenna, gain 12dBi, covers a range of 800 meters in the workshop, connects to AGVs) Robots, temperature and humidity sensors, supporting timed industrial data transmission (5-10 minute intervals), smart agricultural equipment (outdoor sensors with flat-panel directional 4G antennas, directional coverage of farmland areas, resistant to rain interference, stable data transmission ≥99.5%)

　　Core requirements: High anti-interference (shielding effectiveness ≥60dB), wide temperature adaptability (-40℃~85℃), high reliability (MTBF ≥60,000 hours), low cost (suitable for industrial mass deployment)

　　Outdoor and vehicle-mounted communication scenarios

　　Representative products: Rural 4G coverage CPE (external 15dBi high-gain 4G antenna, paired with VLG 4G dual-mode module, achieving "4G to WiFi 5", single device coverage radius ≥400 meters, supports 100+ users simultaneous connection, suitable for rural education and medical networking), vehicle navigation terminal (built-in "4G+GNSS" combined antenna, supports 4G network map updates + positioning, meets vibration resistance standards, 4G during high-speed driving) Disconnection rate ≤0.5%/hour), outdoor security camera (external IP67-rated 4G antenna, ensuring high-definition video (1080P) transmission, latency ≤200ms)

　　Core requirements met: High gain (≥10dBi), IP67 protection, resistance to harsh environments (temperature and rain resistance), cost-effective (more suitable for large-scale outdoor deployment compared to 5G)

　　IV. Customized Services and Compliance Certification

　　Customization Process

　　Requirement Interaction: Define equipment size (e.g., ≤10cm²), 4G frequency band requirements (single band/full band), environmental parameters (temperature, protection level), cost target (e.g., bulk unit price ≤XX yuan), transmission requirements (speed/latency);

　　Solution Design: 2D/3D simulation (predicting 4G signal coverage, interference avoidance), antenna form and material selection (FPC/LDS/glass fiber, balancing cost and performance), multi-module integration solution (e.g., 4G+WiFi+GNSS) Collaboration);

　　Sample Verification: Sample production completed in 1-2 weeks, testing passive parameters (gain, VSWR) and active performance (speed, disconnection rate), supporting customer 4G module integration (e.g., Quectel, ZTE, Qualcomm modules);

　　Mass Production Delivery: Mass production cycle of 3-4 weeks, providing an integrated kit of "antenna + harness + debugging guide", supporting small-batch trial production (minimum order of 100 sets), reducing customer trial and error costs;

　　Compliance and Certification

　　4G-Specific Certifications: Passing 3GPP LTE standard compliance testing, FCC ID (US 4G certification), CE-RED (EU 4G electromagnetic compatibility), SRRC (China 4G radio type approval), TELEC (Japan 4G certification);

　　Industry Standards: Industrial-grade models comply with IEC 61000-6-2 (industrial electromagnetic compatibility), automotive models comply with ISO 19642 (automotive electronic equipment), consumer-grade models comply with GB... 4943.1-2011 (Information Technology Equipment Security);

　　Environmental Compliance: All materials comply with RoHS 2.0 (Restriction of Hazardous Substances) and REACH (Control of Substances of Very High Concern), and SGS test reports are available, adapting to global environmental requirements.

　　Benchmark Cooperation Cases

　　Consumer IoT: Provided Hikvision smart water meters with built-in miniature 4G antennas, supporting low-power remote meter reading, with over 1 million units deployed in batches and a disconnection rate of ≤0.3%;

　　Industrial Sector: Provided ZTE industrial gateways with external fiberglass 4G antennas, solving the signal blind spot problem in smart factories and improving data transmission stability by 65%;

　　Outdoor Coverage: Provided a rural 4G project for an operator with IP67-rated high-gain 4G antennas, achieving a single-device coverage radius of 450 meters, expanding the coverage range by 40% compared to traditional antennas, and reducing costs by 35%.

　　V. Selection Recommendations (Matching Core Parameters According to Scenarios)

　　Consumer-grade IoT small devices (such as smart water meters, AI...) Plush Toys

　　Recommended Type: Built-in FPC/LDS/PCB 4G Antenna (Full Band)

　　Key Considerations: Size ≤12cm² (suitable for compact equipment spaces), Gain 2-4dBi (omnidirectional coverage), Low power consumption (standby ≤60μA), Low cost (suitable for bulk purchasing), paired with VLG standard FPC harness (0.1mm²) to reduce signal loss

　　Industrial IoT Devices (e.g., industrial gateways, agricultural sensors)

　　Recommended Type: External Fiberglass/Planetary Directional 4G Antenna (Full Band)

　　Key Considerations: Gain 8-15dBi (long-distance coverage), Shielding effectiveness ≥60dB (resistant to industrial electromagnetic interference), Wide temperature range -40℃~85℃, IP65 protection (dustproof and waterproof), compliant with IEC 61000-6-2 standard to ensure stable operation in industrial environments

　　Outdoor and Automotive Scenarios (e.g., 4G) CPE, Car Navigation)

　　Recommended Type: External High-Gain Adhesive Stick / Flat Panel 4G Antenna (Full Band, Supports Carrier Aggregation)

　　Key Considerations: Gain 10-18dBi (Wide Coverage), IP67 Protection (Complex Outdoor/In-Vehicle Environments), UV Resistance/Salt Spray Resistance (Long-Term Outdoor Use), Compatible with VLG 4G Dual-Mode Module (4G+2G Backup), Balancing Performance and Cost