433MHz Antenna | Quarter Wave Helical for RF Modules
433MHz Antenna – Quarter-Wave Helical for Wireless RF
This 433MHz antenna is designed for short-range wireless communication using RF modules. It provides reliable signal transmission and reception for remote controls, IoT sensors, and hobbyist radio projects. The helical design offers a compact yet effective solution with a nominal 2dBi gain, making it ideal for projects where size matters without sacrificing performance. With its 50-ohm impedance, it matches standard RF circuits, minimizing signal loss.
Key Specifications
| Specification | Value |
|---|---|
| Frequency Range | 433 MHz |
| Impedance | 50 ohms |
| VSWR | ≤2.0 |
| Gain | 2 dBi typical |
| Polarization | Linear (vertical) |
| Connector | SMA Male (solderable pin also available) |
| Length | Approximately 170 mm (quarter-wave) |
What You Can Build With This
- 433MHz wireless remote control for lights or fans
- IoT sensor node transmitting temperature/humidity data
- Garage door opener or car remote replacement
- Simple walkie-talkie for learning radio basics
Compatibility
This antenna works with any 433MHz transmitter or receiver module, including popular pairs like FS1000A and XY-MK-5V. It connects via standard SMA jack or can be soldered directly to pads on circuits operating at 3.3V to 12V. Commonly used with Arduino, ESP8266, and Raspberry Pi for wireless data links. The quarter-wave design ensures a balanced radiation pattern in free space.
Wiring Notes
If using the SMA connector, screw it onto a mating SMA jack on your module. For direct solder, the center pin is the signal and the outer ground plane must be connected to circuit ground. Keep the antenna vertical and away from large metal objects for best range. No external matching network is required when used with typical 50Ω modules. For battery-powered projects, consider placing the antenna away from the battery to avoid detuning.
Why Buy from Compoden
Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.
Is this compatible with 433MHz RF modules like FS1000A?
Yes, it's tuned for 433MHz and directly fits modules with SMA jacks or solder pads. Works with FS1000A, XY-MK-5V, and similar.
What's the connector type?
The antenna has an SMA male connector, but it also comes with a solderable pin at the base for direct PCB attachment.
Can I use this antenna outdoors?
It is suitable for indoor and light outdoor use; however, for permanent outdoor installation, consider an antenna with weatherproofing like an IP-rated enclosure.
📦 Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.
Ask Soldr above what you can build with this — it knows every Compoden kit this part appears in.
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items