433MHz Spring Antenna 2dbi 0.6x5x28mm

Description

433MHz Spring Antenna 2dbi 0.6x5x28mm Spring Antenna 433MHz 2dBi – Key Specifications Dimensions: 0.6mm (wire dia) × 5mm (coil dia) × 28mm (length) 1. RF Characteristics Frequency: 433MHz (ISM band) Gain: 2dBi (typical) Bandwidth: ±10MHz (VSWR <2.0) Impedance: 50Ω (nominal) VSWR: <1.5:1 at 433MHz Polarization: Linear 2. Physical Construction Material: Copper spring with nickel plating Mounting: Through-hole (THT) or solder pad Connector: None (direct solder to PCB) Weight: ~0.2g 3. Environmental Ratings Operating Temperature: -40°C to +85°C Storage Temperature: -55°C to +105°C Humidity Resistance: 95% RH (non-condensing) 4. Radiation Pattern Omnidirectional in horizontal plane Vertical polarization 5. Applications 433MHz RF modules (e.g., HC-12, LoRa) Remote controls Wireless sensors IoT devices PCB Layout Recommendations Ground Plane: Keep clearance ≥5mm around antenna (no copper pour). Matching Network: Use π-network (L/C) to fine-tune impedance. Orientation: Mount vertically for best performance. Tuning Tips Trim Length: Cut to λ/4 (16.3cm) for 433MHz if needed (this spring is helical-loaded). VNA Testing: Use a vector network analyzer to check S11 parameter.