SMA SIM800, SIM900 GSM & GPRS Module Antenna

Technical Specifications

• Antenna Type: GSM / GPRS Quad-Band External Antenna

• Frequency Range: 850 MHz / 900 MHz / 1800 MHz / 1900 MHz (Quad-Band support)

• Supported Networks: 2G GSM and GPRS communication

• Gain: Typically 2 dBi to 3 dBi

• Impedance: 50 Ω nominal

• VSWR: ≤ 2.0 for efficient signal matching

• Polarization: Vertical

• Radiation Pattern: Omni-directional (uniform coverage around the antenna)

• Maximum Power Handling: Up to 50 Watts

• Connector Type: RP-SMA Male with nut and washer (bulkhead mount)

• Cable Type: RG174 low-loss coaxial cable

• Cable Length: Approximately 10 – 15 cm

• Mounting Type: Screw-mount via RP-SMA bulkhead, suitable for enclosure or panel installation

• Antenna Length: 5 cm

• Housing Material: ABS plastic with a flexible rubberized coating for durability

• Color: Black

• Operating Temperature Range: –40 °C to +85 °C

• Storage Temperature Range: –45 °C to +90 °C

• Relative Humidity: Up to 95 % non-condensing

• Power Supply: Passive (no external power required)

• Input Voltage: Not applicable (receives signal passively)

• Waterproof Rating: IP65 equivalent (depends on model version; resistant to humidity and dust)

Electrical Performance

• Return Loss: Better than –10 dB across GSM frequency bands

• Efficiency: Typically above 70 % in open-air conditions

• Cable Attenuation (RG174): Approx. 0.5 dB per meter at 1.8 GHz (minimal due to short length)

• Bandwidth: Covers entire GSM/GPRS quad-band range without tuning

• Resonance: Centered near 900 MHz and 1800 MHz

Mechanical Characteristics

• Connector Mounting Type: Bulkhead mount with washer and nut for secure fixing

• Connector Material: Brass with nickel plating for corrosion resistance

• Cable Jacket Material: PVC or Teflon, flexible and weather-resistant

• Antenna Body Type: Straight monopole type

• Weight: Approx. 25 – 35 grams

Installation and Mounting Notes

• Mount the antenna vertically for the best signal strength.

• Ensure the antenna is placed at least 10 mm away from metallic surfaces to avoid detuning.

• If installed inside an enclosure, position it near an RF-transparent surface (plastic window or top cover).

• Avoid sharp bends in the cable to minimize signal loss.

• For maximum performance, route the RG174 cable away from high-frequency or high-current traces.

Applications

• GSM and GPRS modems

• IoT communication devices

• Vehicle tracking systems (GPS/GSM combinations)

• Remote monitoring and telemetry equipment

• SMS/voice-based control systems

• Home automation modules

• Data logging and cloud-connected devices