WALKIE-TALKIE

The Zhongxing 16 satellite, also known as the Shi 13 satellite, is a high-throughput communication satellite in China's high orbit and the first (currently only one) high-throughput satellite in the Ka frequency band

It is worth mentioning that the total high communication capacity of Zhongxing 16 satellite exceeds the total capacity of all communication satellites in China before, which can be said to have driven a great leap in China's satellite communication technology

At that time, the launch process of this satellite involved electric propulsion technology, which was also the first high-orbit satellite in China to adopt electric propulsion technology. It can be said to be a revolutionary technological breakthrough in the field of high-orbit satellites, which also means that China's satellite laser communication technology has reached the world's forefront level

In fact, satellite connections can be divided into L-band, Ku band, and Ka band based on different frequency bands. The so-called "Ka band", also known as 30/20 GHz band, is part of the microwave band of the electromagnetic spectrum, with a frequency range of 26.5-40GHz

The Ku band (K-under band) frequency is 10.7-12.75GHz for the downlink and 12.75-18.1GHz for the uplink. It can be seen that compared to the Ku frequency band, the Ka frequency band has a higher frequency. Therefore, when the aperture is equal, the Ka frequency band antenna has better directionality and receives less adjacent satellite interference, resulting in relatively high system performance

Based on this, the information transmission capability of Zhongxing 16 satellite, which is the first to apply the Ka frequency band multi beam broadband communication system, has significantly improved, with a total communication capacity exceeding 20G

Because of the above characteristics, this satellite is called&quo; Supersatellites

With the advent of commercial aerospace and the 5G era, the frequency resources of satellites are becoming increasingly scarce, and users have increasingly high requirements for data transmission bandwidth and speed. This forces satellite manufacturers and operators to seek

Developing higher wireless communication frequency bands to meet new demands, and the Ka band has begun to enter people's vision more frequently

This frequency band has three characteristics: wide available bandwidth, low interference, and small device size. Therefore, this frequency band can be suitable for high-speed satellite communication, gigabit level broadband digital transmission, high-definition television (HDTV), personal satellite communication, and other fields

Ka band characteristics:

Compared with traditional satellite communication frequency bands such as S, C, and X, the Ka band has the following characteristics:

Wide available bandwidth and high throughput

As shown in Figure 1, the Ka band has a wider range than other frequency bands and has the characteristic of high throughput, which can provide wider spectrum resources to achieve more data transmission

XLF05A Ka Portable Intelligent Terminal

XLF05A is a portable and highly integrated fully automated intelligent satellite communication terminal with an equivalent diameter of 0.5m and a Ka frequency band. It uses a Ka frequency band antenna and integrates satellite communication modems, RF transceiver components, wireless routers, etc. It automatically tracks and connects to the high-throughput satellite of Zhongxing 16. Users can get rid of ground network limitations and enjoy a fast network experience of up to 10Mbps (downlink)/6Mbps (uplink)

The device is equipped with inertial navigation, magnetic heading, GPS/BD reception, and signal receiver internally. It uses a torque powerful DC brushless motor, combined with intelligent search algorithms, to quickly and accurately track the target satellite. The equipment adopts a precision harmonic reducer and has self-locking function, ensuring high tracking accuracy in harsh environments

Easy to use, reliable in functionality, providing high-performance and uninterrupted communication capabilities when connected to the network, suitable for various applications such as high-definition video streaming, high-capacity data transmission, tactical or emergency communication

Compared to the low-frequency band, the Ka band was developed and launched later, so frequency resources are relatively less crowded. The general available bandwidth for the C-band is 500MHz to 800MHz; The available bandwidth of the Ku frequency band is 500MHz to 1000MHz; The available bandwidth in the Ka band can reach 3500MHz

From the perspective of applying for frequency permission, low-frequency spectra have been extensively developed, and new commercial satellite companies need to coordinate frequencies with corresponding entities to obtain access rights. Although the use of Ka band frequencies may also require coordination, it at least avoids the congestion and saturation of traditional frequency bands

Rain decay

In addition to significant advantages such as wide communication frequency band and small terminal size, the Ka band also has certain shortcomings. Due to its high frequency and short wavelength, it has poor ability to bypass obstacles and is significantly affected by weather conditions such as clouds, rainfall, and haze, which brings certain difficulties to the use of the Ka band in areas with high rainfall. In order to meet normal data capacity requirements even on rainy/cloudy days, it is often necessary to receive more capacity than is actually needed to compensate for weakened signals

Application of Ka Band in Communication Satellites

Based on the high throughput and larger data transmission capacity of the Ka high-frequency band, communication satellites can provide low latency and high-speed data connection services to end consumers. Since the beginning of this century, communication satellite operators have increased investment in the Ka band and built and launched a series of Ka band satellites

Like communication satellites in other operating frequency bands, Ka band communication satellites mainly target areas that are not covered by ground communication networks, as a supplement to ground communication network systems. The main application scenarios include voice messaging services in remote areas, internet connection services at sea/on board, community internet services, emergency communication, television broadcasting services, Internet of Things data transmission, corporate intranet, etc

Xinglian Tiantong has fully deployed in the Ka frequency band and looks forward to working with partners to provide communication support for mobile emergency response in various regions

Introduction to Xinglian Tiantong Ka Band Products

XLF05A Ka Portable Intelligent Terminal

XLF05A is a portable and highly integrated fully automated intelligent satellite communication terminal with an equivalent diameter of 0.5m and a Ka frequency band. It uses a Ka frequency band antenna and integrates satellite communication modems, RF transceiver components, wireless routers, etc. It automatically tracks and connects to the high-throughput satellite of Zhongxing 16. Users can get rid of ground network limitations and enjoy a fast network experience of up to 10Mbps (downlink)/6Mbps (uplink)

The device is equipped with inertial navigation, magnetic heading, GPS/BD reception, and signal receiver internally. It uses a torque powerful DC brushless motor, combined with intelligent search algorithms, to quickly and accurately track the target satellite. The equipment adopts a precision harmonic reducer and has self-locking function, ensuring high tracking accuracy in harsh environments

Easy to use, reliable in functionality, providing high-performance and uninterrupted communication capabilities when connected to the network, suitable for various applications such as high-definition video streaming, high-capacity data transmission, tactical or emergency communication