Lora Antenna

LoRa Antenna is a 433MHz and 868–920MHz industrial IoT RF external rod antenna designed for long-range spread spectrum communication.

Developed by Qianmu Communication, this antenna adopts a split external rod structure that can be flexibly installed on device housings, poles, and boxes, reducing signal shielding loss caused by metal shells, walls, and mainboards.

It uses a one-piece molded pure copper oscillator and weather-resistant PVC housing, accurately covering the 433MHz low band and global 868–920MHz ISM band.

With stable batch performance, the LoRa Antenna is suitable for long-distance low-power IoT networking projects.

Working Principle

Qianmu Communication 433/868–920MHz LoRa Antenna uses a segmented resonant oscillator design combined with omnidirectional RF radiation to achieve long-distance signal transmission and reception.

The internal structure includes an RF connector, impedance matching oscillator, isolation shielding layer, and waterproof protective housing. All performance parameters are tested by the company's RF laboratory using a vector network analyzer.

1. Dual-Band Segmented Resonance Design

The antenna integrates two independently matched oscillators for the 433MHz low-frequency band and 868–920MHz ISM band. The measured full-band VSWR is ≤1.3, ensuring stable resonance across both frequency ranges.

One antenna supports two mainstream LoRa communication bands without requiring separate inventory.

2. 360° Omnidirectional Radiation Design

The symmetrical rod-shaped oscillator structure provides uniform horizontal radiation with fluctuation of ≤1dB and reduces signal blind spots.

Under the same transmission power, the measured transmission distance in an open area is 2.8 times longer than that of a device built-in antenna, supporting multi-directional device networking without signal imbalance.

3. Metal Shielding and Anti-Interference Structure

Copper shielding rings are integrated into the antenna base to reduce electromagnetic interference from gateway mainboards, industrial motors, and power supply cables.

In strong interference environments such as factories and substations, measured data packet loss is reduced by 65%, ensuring stable IoT data transmission.

4. Outdoor Weather-Resistant Structure

The antenna adopts a thickened PVC waterproof housing with sealed rubber gaskets. It has passed 72-hour cyclic aging tests and rainwater resistance tests from -40°C to +70°C.

The oscillator remains protected from oxidation, with frequency deviation within ≤±2MHz, maintaining stable outdoor performance.

5. 50Ω Standard Impedance Matching

The antenna uses precise factory impedance adjustment and supports standard RF interfaces for LoRa devices.

It reduces signal reflection caused by impedance mismatch, lowers device transmission power by 12%, and extends terminal battery life.

Compatible with supporting devices

This LoRa antenna has strong RF compatibility and can be directly connected to the vast majority of low-power iot communication terminals without adapter accessories

1. LoRa communication host: 433MHz LoRa gateway, 868/915MHz industrial LoRa concentrator, outdoor LoRa acquisition base station, wireless data transmission radio

2. Smart sensing terminals: Soil temperature and humidity sensor, water quality monitoring probe, gas/fire smoke alarm, liquid level pressure collector

3. Industrial Internet of Things (iot) devices: workshop data acquisition terminal, production line wireless kanban, warehouse goods location tag host

4. Smart city accessories: Street lamp single-lamp controller, parking magnetic detector, manhole cover status monitor, outdoor security alarm host

5. Rf accessory components: RF feeders, signal power dividers, RF relay amplification modules

Standardized technical specifications

All parameters are the results of in-house RF anechoic chamber tests. Each batch of LoRa antennas comes with a paper factory test sheet, which can be used for project acceptance, export customs declaration, Party A qualification verification:

Purchasing Guide

Many IoT purchasers and R&D engineers select models mainly based on price, which may result in insufficient transmission distance, outdoor damage, project rework, and increased costs later.

When purchasing Qianmu Communication LoRa Antenna, the model can be selected according to four key factors:

1. Select According to Frequency Band Requirements

For European exports and domestic municipal projects, the 868MHz band is preferred. The 433MHz band is suitable for domestic farmland applications and industrial 433MHz sensor devices.

For multi-band hybrid networking projects, choose 433/868–920MHz dual-band LoRa external antennas to support different devices with one antenna.

2. Select According to Operating Environment

For indoor dry rooms and offices, standard models can be selected according to application conditions.

For outdoor farmland, municipal street lamps, and coastal high-humidity or high-salt environments, choose IP65 waterproof and weather-resistant models to prevent water ingress and failure.

For regions with sub-zero temperatures in northern areas, confirm that the product supports low-temperature operation of ≥-40°C.

3. Select According to Transmission Distance Requirements

For short-distance indoor equipment, low-gain antennas can be selected.

For outdoor monitoring applications in farmland and parks covering several kilometers, high-gain dual-band antennas should be used to reduce gateway investment.

4. Select According to Project Requirements

For laboratory testing and short-term projects, small quantities of standard models can be purchased.

For long-term large-scale projects such as smart cities and smart agriculture, bulk customization with screen-printed logos and dedicated interfaces can be selected to maintain consistent equipment appearance and reduce long-term operation and maintenance costs.

FAQ

Q1: Does this LoRa external antenna support both 433MHz and 915MHz frequency bands simultaneously?

A1: Qianmu Communication's LoRa external antenna covers the full range of 430-440MHz, 860-930MHz, and is perfectly compatible with the mainstream ISM bands of 433MHz, 868MHz, and 915MHz. A single antenna can be adapted to LoRa devices in different regions.

Q2: Can the antenna interface, housing LOGO and export packaging be customized?

A2: Fully customizable. As the source Factory, we can replace various types of RF interfaces such as SMA/BNC/N/IPEX on demand, support silk-screen printing of customer brand LOGO on the shell, custom neutral English export color box, and the minimum order quantity for OEM/ODM custom orders can be flexibly negotiated.

Q3: How can we confirm the actual transmission distance of the LoRa external antenna? Can we provide the measured data?

A3: Yes. Each batch of LoRa external antennas comes with a radio frequency anechoic chamber test report.