Rubber Duck Antenna - Plastic Abs+pc, 13x241mm, Black | Compact, Flexible, Tilt & Swivel Design, Sma Connector, Optional Magnetic Mount, 2dbi Gain

We are manufacturing, distributing, exporting and supplying a broad range of Omnidirectional Portable Dual-Band 433 MHZ,868 MHZ Rubber Duck Antenna in Dongguan, Guangdong, China.

The C&T RF Antennas Inc "Rubber-Duck" Wireless LAN antennas provide broad coverage with an omni-directional pattern. All antennas feature tilt-and-swivel connectors and are available in models ranging from 1 dBi to 9 dBi.

Features:
Compact size
Flexible "Rubber Duck" antenna
Tilt and swivel design
SMA Connector
Optional Magnetic Mount Available

The C&T RF Antennas Inca s Rubber duck antennas can be connected directly to the wireless device or alternately attached to a magnetic base, which can be mounted vertically or horizontally on any metal surface. The base is then connected to the device with an extension cable.

433MHz | 868MHz Antenna
This range has been designed as a cost-effective antenna to provide longer range coverage for 433 | 868MHz ISM band applications. The omnidirectional radiation pattern allows the antenna to be quickly installed. This antennas provides an ideal solution for infill coverage, or to improve gain for a subscriber installation. Optional wall or bracket mount.
Antenna comes with 5m cable and SMA connector and provides 2dBi gain.

Key Features
Ground-plane independent
Wall or bracket mount
Improve range
Easy installation
2dBi gain

RF Antenna Electrical specifications:
Antenna Type: Omni portable 433&868Mhz Lora Antenna
Frequency center: 433 & 868Mhz
Gain: 2dBi
Beam width:
H: 360A
V: 5A
VSWR: a 1.8
Input impedance: 50IC
Polarization: Vertical
Maximum power: 50W
Lightning protection: DC ground
Connector : SMA Male
Material: Plastic ABS+PC
Color: Black
Rubber Duck antenna Size: 13x241mm

Mechanical specifications:
Working temperatures: -40 to 60A C
Storage temperatures: -40 to 65A C

The use of 433 and 868 MHz
433 and 868 MHz enable C&T to communicate with numerous wireless devices from a broad range of different brands. Since the communication standards are relatively old there are many devices which use it, especially the more affordable devices. 868 MHz features several security devices. Note that these are just a few the relatively well-known brands. There are TONS of wireless devices out there which use these technologies a from robot lawn mowers to fireplaces and TV mounts and much, much more!

433MHz essentially is a frequency band that is used for communication in home appliances among other things. It has become quite popular as most countries in the world have freely allowed communication. This means devices may use the band without any restrictions or license fees. The only limitation is transmitting power, but the power limit is plenty for wireless transmission around the house. 868MHz is also free to use but requires your device to keep communication to a minimum (it is only allowed to transmit a signal more than 1% of the time). This makes 868MHz more suited for alarm/security signals since signals have a higher probability of getting through without being disrupted by other devices. This is a key difference compared to the unrestricted 433 bands, where everyone can just a shouta (i.e. transmit data) and thereby disturb other signals.

How 433Mhz and 868Mhz communication works
Communication on 433/868 works with radio frequency waves on those frequencies. These waves are transmitted and received by a radio transceiver with an antenna. On these bands, a couple of communication methods can be used, called radio modulations.

The most commonly used radio modulations on 433 and 868MHz are ASK (Amplitude-Shift Key) and variations of FSK (Frequency-Shift Key) like BFSK or GFSK. Basically, they define how data is transmitted: ASK uses differences in Amplitude (transmitting power) to create waves/data transmission. FSK uses slight differences in frequency instead. Nearly all 433/868 devices support just a single radio modulation. Often for controllers, this is ASK modulation for 433 and FSK modulation for 868 MHz.