Omnidirectional MIMO 4x4 antenna

　　Omnidirectional MIMO 4x4 antenna: a powerful tool for all-round coverage of wireless communication

　　In today's rapidly developing wireless communication field, the demand for efficient, stable and widely covered networks is increasing day by day. Omnidirectional MIMO 4x4 antenna has become one of the key technologies to meet these needs with its unique design and excellent performance, and plays an indispensable role in many scenarios.

　　Technical principles and features

　　MIMO technology foundation

　　As the core technology of modern wireless communication, MIMO (Multiple Input Multiple Output) technology uses multiple antennas at the transmitting and receiving ends at the same time to improve communication performance by using spatial dimensions. The omnidirectional MIMO 4x4 antenna system is equipped with four transmitting antennas and four receiving antennas, and can transmit up to four independent data information streams simultaneously on the same frequency band. The transmitting end splits the original data into multiple sub-data streams and sends them out through four transmitting antennas respectively. The receiving end uses advanced signal processing algorithms to accurately separate these sub-data streams from the mixed signals received by the four receiving antennas, and then recombine and restore the original data, thereby significantly improving the data transmission rate and spectrum efficiency.

　　Omnidirectional radiation characteristics

　　The omnidirectional MIMO 4x4 antenna is distinguished from the directional antenna by its unique omnidirectional radiation characteristics. It radiates signals uniformly in all directions with the antenna as the center, and the coverage range is 360 degrees circular. This feature makes it very advantageous in scenarios where the signal propagation environment is relatively simple and there is a need for all-round coverage. Its horizontal radiation pattern is circular, which can provide signal connections for receiving devices in all directions around it, ensuring that all devices within a certain range can receive stable signals.

　　Diversity technology improves reliability

　　In wireless communications, signals are easily affected by multipath propagation, obstruction and other factors and fade. The omnidirectional MIMO 4x4 antenna uses diversity technology to effectively deal with this problem. By receiving signals through multiple antennas, the difference in fading characteristics of signals received by different antennas is used to reduce the probability of deep signal fading. In this system, the receiving end can obtain multiple signal copies from four receiving antennas, and select or merge the copies with the best signal quality through algorithms such as selection merging and maximum ratio merging to improve the reliability of the received signal. For example, in an urban environment, signals are reflected and refracted multiple times between buildings. The diversity technology of the omnidirectional MIMO 4x4 antenna can significantly improve signal quality and reduce communication interruptions.

　　Product Types and Features

　　Indoor Ceiling Omnidirectional MIMO 4x4 Antenna

　　Indoor Ceiling Omnidirectional MIMO 4x4 Antennas are commonly found in various indoor places, such as shopping malls, office buildings, hotels, smart home environments, etc. Take the AL-XD165 model of the Anlong brand as an example. It is a 5G Lte 4-port 4X4 broadband MIMO omnidirectional indoor ceiling antenna covering 698-4000MHz, and the gain is generally between 3dBi-5dBi. This type of antenna is usually installed on the ceiling. Its appearance design is simple, does not take up too much indoor space, and can radiate signals evenly in all directions below, providing stable network connections for wireless devices in every corner of the room. In a smart home environment, home gateways equipped with such antennas can ensure that all kinds of smart devices in the home, such as smart speakers, smart cameras, smart bulbs, etc., can connect to the network smoothly, and realize interoperability and remote control between devices.

　　External omnidirectional MIMO 4x4 antenna

　　Some wireless routers or communication devices are equipped with external omnidirectional MIMO 4x4 antennas, such as TP-LINK's TL-WDR7400 Gigabit wireless router, which provides 4X4 MIMO technology in the 5GHz band. The router has 4 external 5GHz non-detachable omnidirectional antennas. Through scientific antenna layout, the same-frequency antennas can be more isolated in a limited shell space, effectively reducing signal interference. These external antennas usually have a higher gain, generally around 5dBi, which can enhance signal strength and expand signal coverage. In an enterprise office environment or home network, when multiple devices are connected to the network at the same time for online entertainment, learning, office work and other activities, the external omnidirectional MIMO 4x4 antenna can ensure network stability, avoid video freezes, game disconnections, etc., and provide high-speed and stable wireless network connections for multiple devices.

　　Car-mounted omnidirectional MIMO 4x4 antenna

　　With the development of intelligent transportation and Internet of Vehicles technology, the application of car-mounted omnidirectional MIMO 4x4 antennas is becoming more and more extensive. Take Desit's BAT (X) M4 series as an example. This is a car-mounted antenna solution for 4G/5G, supporting optional GNSS, and optional 2×2 or 4×4 dual-band 2.4/5.0 - 7.2 GHz WiFi 6E. Its 4G/5G antenna elements cover 617 - 960/1427 - 6000MHz, providing strong communication stability and ensuring high data rate transmission even in challenging network coverage areas. The antenna has an IP55 protection rating and is designed to be installed on/under the vehicle dashboard or luggage rack. It can also be installed on any non-conductive surface. It is equipped with an integrated low-loss flame-retardant cable that meets the UN ECE R118 and EN45545-2 certification requirements, ensuring flexible installation while providing low signal loss. During the vehicle's driving, the on-board omnidirectional MIMO 4x4 antenna can provide a stable network connection for the vehicle's navigation system, entertainment equipment, intelligent driving assistance system, etc., support the vehicle to communicate with roadside infrastructure or other vehicles, and improve traffic safety and smoothness.

　　Application Areas

　　Smart Home and Office Networks

　　In smart home systems, omnidirectional MIMO 4x4 antennas are the key to achieving device interconnection. Many smart home devices such as smart door locks, smart appliances, environmental sensors, etc. communicate with the home gateway through 915MHz or other related frequency bands, and the omnidirectional MIMO 4x4 antenna equipped with the home gateway can ensure full coverage of the signal and achieve stable data interaction between devices. Users can use their mobile phones to remotely control their smart air conditioners to start cooling and their smart rice cookers to start cooking on their way home from get off work. This is inseparable from the stable data transmission of the omnidirectional MIMO 4x4 antenna. In the corporate office environment, employees have many devices such as laptops, smartphones, and tablets. Enterprise-level wireless routers or wireless access points that support omnidirectional MIMO 4x4 technology can provide efficient wireless network connections for these devices. Employees can smoothly conduct video conferencing, file sharing, cloud storage access, and other tasks to improve office efficiency. For example, HPE Aruba Networking's AP-755 (RW) tri-radio 4x4 Wi-Fi 7 internal antenna campus wireless access point, which supports 4x4 MIMO with an integrated downtilt omni-directional antenna, has a peak antenna gain of 5.3 dBi at 2.4 GHz, 6.0 dBi at 5 GHz (5.8 dBi in dual 5 GHz mode), and 6.0 dBi at 6 GHz (5.9 dBi in dual 6 GHz mode), providing strong and stable wireless network coverage for corporate office areas.

　　Public places and commercial areas

　　In public places such as shopping malls, supermarkets, hotels, airports, and stations, there are dense crowds and wireless devices are frequently used. Omni-directional MIMO 4x4 antennas can meet the network needs of a large number of users online at the same time. For example, in large shopping malls, customers use their mobile phones to pay for shopping, query product information, connect to the mall's free wireless network to browse the web or watch videos, etc. The omnidirectional MIMO 4x4 antenna deployed in the mall can ensure uniform signal coverage in each area, avoid signal dead spots, provide customers with a smooth network experience, and improve customer satisfaction. In the hotel, guests use various smart devices in the room. The omnidirectional MIMO 4x4 antenna can ensure that each room can receive a stable network signal to meet the guests' needs for Internet office, entertainment, etc.

　　Internet of Things (IoT)

　　In the IoT system, a large number of devices are widely distributed and require stable data communication with the network. Omnidirectional MIMO 4x4 antennas help improve the communication quality and reliability of IoT devices. In smart factories, various sensors, actuators, robots and other equipment communicate with the gateway through omnidirectional MIMO 4x4 antennas to achieve real-time monitoring and automatic control of the production process. For example, the sensor collects data such as temperature, humidity, and pressure on the production line in real time, quickly transmits the data to the gateway through the antenna, and then uploads it to the production management system by the gateway to ensure accurate and efficient production. In the field of smart agriculture, soil moisture sensors, meteorological monitoring stations, drones and other equipment distributed in farmland, with the help of omnidirectional MIMO 4x4 antennas, will collect soil information, meteorological data, crop growth conditions and other information to agricultural managers in real time, helping the development of precision agriculture and improving crop yields and quality.

　　Omnidirectional MIMO 4x4 antennas provide strong support for modern wireless communications with their unique technical advantages, diverse product types and wide range of applications. With the continuous development of wireless communication technology, the demand for high-speed, large-capacity and low-latency communications is increasing. Omnidirectional MIMO 4x4 antenna technology will continue to evolve and play an important role in more emerging fields, further expanding the application boundaries of wireless communications and bringing more convenience and innovation to people's lives and work.