External 433MHz SMA Antenna for RF Communication Modules
This is an external omni directional 433MHz SMA Antenna with 3dBi high gain for RF modules and general wireless applications
- Terminal Mount Antenna
- Center Frequency: 433MHz
- High Efficiency up to 80%
- Swivel and Hinged SMA Male Connector
- Height: 198 mm
- Diameter: 13 mm
- RoHS Compliant
- Technical Specifications
- Introduction
- Datasheet
| Antenna Type | 433MHz SMA Antenna |
| Frequency Range | 433 + / – 3 MHz |
| Peak Gain | 3dBi |
| Impedance | 50 Ohm |
| VSWR | <2.0 |
| Polarization | Vertical |
| Radiation Pattern | Omni Directional |
| Connector Type | SMA Male |
| Radome Color | Black |
| Package | PE Bag |
This is a high performance, high efficient terminal mount 433MHz SMA Antenna, it is 210mm tall and 13mm in diameter, also, it can be mounted straight or right angle (0 degree, 45 degree and 90 degree) due to its swivel and hinged SMA connector which is dealt by standard.
This 433MHz whip antenna performs quite well through metal enclosures, so it is usually used to various applications, like, Smart Meters, Remote Monitoring Devices.
We engineer each 433MHz SMA antenna to deliver low return loss, precise 50 Ohm impedance matching, and rock-solid mechanical reliability across the entire 430 MHz to 435 MHz operational band. Every production batch undergoes strict vector network analyzer testing to guarantee consistent RF performance in demanding industrial and commercial environments.
Key Performance Highlights
- Precision ISM Band Tuning: Tuned across the 430 MHz to 435 MHz frequency range (centered at 433 MHz) to ensure low reflection loss and superior return loss characteristics.
- Flexible Enclosure Integration: Features an integrated 0° to 90° hinged swivel mechanism, allowing straightforward vertical or right-angle orientation to optimize polarization inside compact or complex installation spaces.
- Industrial-Grade Ruggedization: Molded with high-durability thermoplastic polyurethane (TPE), the housing withstands harsh mechanical vibration, physical impact, and severe operating temperature swings ranging from -40°C to +90°C.
- Direct Panel Terminal Mount: Direct connection via standard SMA Male threading ensures minimal RF attenuation, high mechanical stability, and streamlined enclosure manufacturing.
Key Hardware & Environmental Highlights
- Precision RF Matching: Our factory tunes the quarter-wave radiator to achieve a VSWR under 1.8:1 at 433 MHz, preventing reflected power from heating or damaging sensitive RF transceivers.
- Rugged Housing: The flexible TPE radome resists mechanical shock, repeated bending, and continuous industrial vibration without cracking or detuning.
- Low-Loss Connector: We use machined brass SMA male connectors with heavy-duty plating to ensure minimal contact resistance and long cycle life across repeated matings, providing a dependable alternative to standard terminal dipole antenna solutions where compact direct mounting is required.
- Industrial Thermal Tolerance: Fully qualified to operate continuously from -40°C to +85°C, ensuring frequency stability during severe outdoor temperature swings.
433MHz SMA Antenna Applications
Industrial Telemetry & SCADA Systems
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- Remote Terminal Units (RTUs): Reliable RF link for field RTUs, remote pump controllers, and flow monitoring stations.
- Industrial Sensing & M2M: Long-range data transmission in factories, agriculture, and processing plants subject to physical vibration and structural obstacles.
- SCADA Automation: Consistent line-of-sight and non-line-of-sight signal penetration for mission-critical remote control operations.
Smart Utility Metering (AMR / AMI)
Sub-1GHz frequencies excel at penetrating walls, basements, and utility enclosures. We supply rugged terminal antennas designed specifically for antennas for smart metering systems, delivering dependable automated data collection across: Automated gas meters and line pressure monitors Smart electric meters and grid telemetry nodes Pulse-output water meters and municipal distribution nodes
Wireless Security & Access Control
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- Alarm Systems: Stable transmission for commercial and residential wireless alarms, motion detectors, and perimeter sensors.
- Access Control: Low-latency RF communication for automatic gate triggers, barrier arms, and industrial garage doors.
- Remote Controls: High link reliability for 433 MHz rolling-code key fobs, crane controllers, and industrial hoists.
RF Transceiver and Module Interoperability
Our 433MHz whip antenna solutions feature native 50-ohm impedance matching, making them fully compatible with standard Sub-1GHz and LoRa transceivers without extra RF tuning stages: Semtech: SX1278, SX1276 (LoRa / FSK modules)
Texas Instruments: CC1101, CC1310 wireless MCUs
Silicon Labs: Si4463, Si4432 transceiver ICs
Generic 433 MHz ISM: Standard ASK/OOK transmitter and receiver boards
Precision Factory RF Testing and Quality Control
Every production batch undergoes strict quality control. We perform 100% factory RF testing using calibrated Vector Network Analyzers (VNAs) to verify:
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- Resonant Frequency & Bandwidth: Verified center frequency resonance at 433 MHz across production lots.
- VSWR & Return Loss (S11): Strict adherence to VSWR $\le$ 1.8:1 tolerances at the operating band.
- Mechanical Reliability: Torque testing on SMA connector threads and cycle testing on hinged swivel mechanisms.
Related 433MHz Antennas
A 433MHz SMA antenna is an external RF antenna designed for devices operating in the 433 MHz ISM band and equipped with an standard RF SMA connector.
Yes. Our 433 MHz antenna is fully designed from 430 MHz to 435 MHz operating band. It delivers consistent 50 Ohm impedance matching for:
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- LoRa / Chirp Spread Spectrum: Semtech SX1278 and LLCC68 chipsets.
- FSK / GFSK / OOK Systems: TI CC1101, Silicon Labs Si4463, and standard telemetry transceivers.
- Long-Range Links: When deployed alongside a dedicated 433MHz high gain antenna for long range base station setup.
Although they look similar, SMA and RP-SMA connectors have different center-pin configurations.
| Connector Type | Center Contact | Outer Shell Thread |
| Standard SMA Male | Center Pin (Male Pin) | Inside Threads (Hex Nut) |
| RP-SMA Male (Reverse Polarity) | Center Socket | Inside Threads (Hex Nut) |
We manufacture our standard 433MHz SMA antenna with standard SMA Male plugs to interface directly with industrial transceiver terminals and standard panel-mount bulkhead jacks.
Because this antenna exhibits an omnidirectional doughnut radiation pattern with linear vertical polarization, orient the antenna vertically (pointing straight up or down) on both the transmitter and receiver nodes. Keeping both communicating antennas in the same polarization plane avoids cross-polarization attenuation, maximizing link budget and line-of-sight range.