vlg Fiberglass antenna

　　I. Product Positioning and Core Value (Material-Driven Performance Breakthrough)

　　The VLG glass fiber antenna is based on a **"special glass fiber substrate + integrated structure"**, specifically designed for extreme scenarios such as strong corrosion, strong vibration, and strong ultraviolet radiation. It addresses the pain points of traditional antennas in environments such as oceans, plateaus, and rail transportation, namely "rapid signal attenuation and short lifespan". Its core value lies in:

　　Signal fidelity: Utilizing D-type special glass fiber (dielectric constant ≤4.1, loss tangent ≤0.001), the transmittance reaches over 98%, reducing signal loss by 60% compared to ABS + glass fiber shell antennas.

　　Environmental resistance: Wide operating temperature range of -45℃ to 110℃ (exceeding the industrial grade's 50℃ upper limit), withstanding 20,000 hours of UV aging (10 times that of ordinary antennas).

　　Structural reliability: The strength-to-weight ratio of the glass fiber composite material reaches 2.5GPa/kg, with wind resistance up to level 18 (suitable for coastal base stations).

　　II. Technical Parameters and Performance Comparison (Classified by Application Intensity)

　　From a technical parameter perspective, VLG glass fiber antennas are divided into two categories: general industrial grade and extreme environment grade. The performance differences between these and traditional ABS antennas are as follows:

　　Core material: General industrial grade glass fiber antennas use E-type glass fiber reinforced resin, while extreme environment grade glass fiber antennas are upgraded to D-type special glass fiber. + Quartz fiber, while traditional ABS antennas are made of a hybrid material of ABS and glass fiber;

　　Dielectric constant ε: General-purpose industrial-grade glass fiber antennas have a dielectric constant of 3.8~4.1 F/m, while extreme environment-grade glass fiber antennas have a dielectric constant as low as 3.2~3.5 F/m, compared to 4.5~5.2 F/m for traditional ABS antennas. A lower dielectric constant results in lower signal transmission loss;

　　Transmission loss: General-purpose industrial-grade glass fiber antennas have a transmission loss of ≤0.3 dB, while extreme environment-grade glass fiber antennas further reduce it to ≤0.2 dB, compared to ≤0.8 dB for traditional ABS antennas. Glass fiber antennas exhibit significantly superior transmission performance;

　　Salt spray resistance: General-purpose industrial-grade glass fiber antennas can withstand 2000 hours (compliant with ISO 9227 standard), while extreme environment-grade glass fiber antennas withstand 5000 hours (compliant with ASTM B117 standard), compared to only 1000 hours for traditional ABS antennas. Hours of operation, fiberglass antennas offer superior corrosion resistance;

　　Vibration resistance: General-purpose industrial-grade fiberglass antennas support a frequency range of 10-2000Hz and 20G acceleration, while extreme-environment-grade fiberglass antennas extend to a frequency range of 5-3000Hz and 30G acceleration. Traditional ABS antennas only support a frequency range of 10-2000Hz and 15G acceleration, demonstrating higher stability under vibration conditions;

　　Protection level: General-purpose industrial-grade fiberglass antennas are IP66, while extreme-environment-grade fiberglass antennas reach IP68 (capable of immersion in 10 meters of water for 24 hours without failure), compared to only IP65 for traditional ABS antennas. Fiberglass antennas offer superior waterproof and dustproof capabilities;

　　Phase center offset: General-purpose industrial-grade fiberglass antennas have a phase offset of ≤2mm, extreme-environment-grade fiberglass antennas ≤1mm, and traditional ABS antennas ≤3mm, resulting in more precise positioning accuracy.

　　III. Typical Models and Scenario Adaptation (Related to the VLG Positioning Ecosystem)

　　1. Rail Transit Dedicated Type (VLG-FG-Rail-01)

　　Form Features: Streamlined cylindrical shape (80mm diameter, 350mm length), with a railside mounting flange at the bottom, 5mm thick fiberglass shell

　　Core Adaptation:

　　Frequency Bands: Beidou B1I/B2a, GPS L1/L5, Galileo E1/E5a (compatible with train control systems)

　　Collaborating Equipment: VLG industrial-grade receiver D1+5G module M50, supporting sub-second transmission of train positioning data

　　Scenario Value:

　　During switching at high-speed rail tunnel entrances and exits, transmission loss ≤0.2dB, ensuring positioning continuity (traditional antenna switching satellite loss rate 15% → reduced to 2%)

　　Case Study: A section of the Beijing-Shanghai High-Speed Railway, achieving train positioning accuracy of ±0.5 meters in conjunction with track circuitry.

　　2. Marine Engineering Type (VLG-FG-Marine-02)

　　**Shape Features:** Hemispherical (200mm diameter), fiberglass + fluorocarbon coating, anti-marine biofouling.

　　**Core Compatibility:**

　　5000 hours of salt spray resistance (equivalent to 5 years of sea service), corrosion resistance grade C5-M (ISO 12944)

　　**Synergistic Equipment:** VLG shipborne receiver D2+AIS module, supporting dynamic monitoring of ocean-going vessels.

　　**Scenario Value:**

　　In South China Sea oil and gas platform applications, it reduces weight by 40% compared to traditional stainless steel casing antennas, and increases the number of signals acquired by 20% (≥12 satellites in harsh sea conditions).

　　3. High-Altitude Mapping Type (VLG-FG-Survey-03)

　　**Shape Features:** Integrated choke design (weight ≤400g), fiberglass choke groove depth 15mm.

　　**Core Compatibility:**

　　Gain 12dBi, multipath suppression ratio ≥45dB (reduces interference from snow and ice reflections)

　　Collaborative Equipment: VLG Survey Receiver C1 + Differential Station S200, static accuracy ±3mm

　　Scenario Value:

　　During power transmission line surveying on the Qinghai-Tibet Plateau, it operated continuously for 720 hours at -40℃ without performance degradation, extending its battery life by 50% compared to ceramic antennas.

　　IV. Technical Advantages and Selection Guide

　　1. Breakthrough in Core Technology of Fiberglass Material

　　Optimized Transmission: Utilizing quartz fiberglass reinforcement (dielectric constant 3.2), the transmittance remains stable above 98.5% in the 1.1-1.6GHz frequency band.

　　Anti-aging Process: The outer shell uses a three-layer composite of "fiberglass + vinyl ester resin + UV absorber," and after 20,000 hours of xenon lamp aging testing, performance degradation is ≤5%.

　　Lightweight Design: 35% lighter than aluminum alloy antennas of the same size, reducing the weight of drones/ Onboard Equipment Load

　　2. Selection Decision Tree

　　V. Compliance and Maintenance Recommendations

　　Certification System: Certified by IEC 62236-3 (Railway), IMO A.1081 (Marine), and GB/T 2423.10 (Vibration Testing)

　　Maintenance Points:

　　Clean the fiberglass surface every 6 months (using a neutral detergent to avoid scratching the wave-transmitting layer).

　　In extreme environments, it is recommended to use the VLG signal amplifier Amp-05 (gain 20dB, noise figure ≤1.5dB).

　　Lifespan Guarantee: Designed lifespan of 10 years under normal operating conditions (traditional antennas 3-5 years).