IMS - International Microwave Symposium is the preeminent annual gathering, exhibition and symposium for researchers and technologists in radio frequency (RF) technology, microwave and millimeter wave, and academic and industry practitioners worldwide, held annually since 2003, rotating throughout the United States. The conference and exhibition lasts for one week, so it is called American Microwave Week, Microwave Communications Show, Microwave Technology Show. Microwave Technology Expo is known as the world's largest gathering place for RF and microwave professionals, as well as the birthplace of the latest academic research and technology products in the microwave field.  

A base station antenna is a fundamental component in a wireless communication network. These antennas are base station mounted on towers to provide cellular connectivity to users. These antennas are used to cover a single frequency band or multiple frequency bands.

Dipole antennas are the earliest, simplest and most widely used antennas in radio communication. It consists of a pair of symmetrically placed conductors, and the two ends of the conductors that are close to each other are respectively connected to the feeder. When used as a transmitting antenna, the electrical signal is fed into the conductor from the center of the antenna; when used as a receiving antenna, the received signal is also obtained from the conductor at the center of the antenna.Dipole antennas are the most common type of antenna used and are omni-directional, propagating radio frequency (RF) energy 360 degrees in the horizontal plane. These devices are constructed to be resonant at a half or quarter wavelength of the frequency being applied.

Fiber-glass antenna normally ranges in length from 2' to 7', most of them are IP67 waterproof, windproof, high temperature resistance, and corrosion resistance. So, they are also highly durable and long-lasting due to their sturdy construction. They are usually easy to install, and also has good compatibility. In summary, fiberglass antennas have many advantages, including excellent dielectric and mechanical properties, and design flexibility. Compared to traditional metal materials, the use of FRP materials can greatly improve the reliability, stability, and communication quality of antennas.

An antenna is mainly used as a metallic device for radiating or receiving radio waves which is basically used for transmitting signals, transmitting antenna is used to transmit  information and for receiving signal, receiving antenna is used at receiver end to receive signals. Our company has a wide variety of antennas for you to choose .

Radiates and receives energy equally in all horizontal directions, called an omnidirectional antenna. This antenna is best suited for applications requiring full coverage. In addition, the outstanding feature of the omnidirectional antenna is its rod radome, like a monopole antenna. The terms "rubber duck" and "whip antenna" are commonly used. Additionally, high gain omni antennas work by pushing energy lobes in from the top and bottom, and out in a doughnut-like pattern . If you keep pushing towards the ends of the pink balloon, it creates a pancake effect with a narrow vertical beamwidth but a large horizontal coverage. This high gain antenna design provides long communication distances, but has one drawback.

In our fast-paced and technologically advanced world, GPS (Global Positioning System) has become an integral part of our lives. Whether it’s navigating through unfamiliar places or tracking fitness activities, GPS provides us with accurate positioning information. But have you ever wondered how GPS works? Behind this remarkable technology lies a crucial component called the GPS antenna. In this blog post, we will explore the significance of GPS antennas and their role in ensuring precise navigation. A GPS antenna is a specialized device that receives signals from satellites and enables devices to determine their precise location on Earth’s surface. These antennas are designed to capture GPS signals effectively and transmit them to the GPS receiver for further processing. The antenna’s primary function is to receive weak signals from multiple satellites and provide the receiver with the necessary data for accurate positioning. GPS antennas are indispensable components that ensure accurate and reliable positioning information. These antennas receive signals from satellites, overcoming obstacles and environmental challenges to provide precise location data. With ongoing developments in GPS antenna technology, we can expect even better performance and improved navigation capabilities in the future. 

Standing Wave Ratio is called Voltage Standing Wave Ratio, also known as VSWR and SWR, which is the abbreviation of English Voltage Standing Wave Ratio.In the incident wave and the reflected wave phase of the same place, the voltage amplitude is added to the maximum voltage amplitude Vmax, the formation of the wave belly; in the incident wave and the reflected wave phase of the opposite place the voltage amplitude is reduced to the minimum voltage amplitude Vmin, the formation of the wave section. Other points of the amplitude value is between the belly and the wave section. This synthetic wave is called a standing wave. Standing wave ratio is the standing wave wave at the sound pressure amplitude Vmax and the amplitude of the sound pressure at the wave section Vmin ratio. In the standing wave tube method, the standing wave ratio can be measured to find the sound reflection coefficient and sound absorption coefficient of the sound-absorbing material.In radio communication, the impedance mismatch between antenna and feed line or the impedance mismatch between antenna and transmitter, high-frequency energy will be reflected and folded back, and with the forward part of the interference convergence occurs standing wave. In order to characterise and measure the standing wave characteristics of antenna system, that is, the antenna forward wave and reflected wave situation, people established the concept of "standing wave ratio".SWR=R/r=(1+K)/(1-K)Reflection coefficient K=(R-r)/(R+r)R and r in the formula are the output impedance and input impedance, respectively. When the two impedance values are the same, that is, to achieve a perfect match, the reflection coefficient K is equal to 0, the VSWR is 1. This is an ideal situation, in fact, there is always reflection, so the VSWR is always greater than 1.RF system impedance matching. Special attention should be paid to the voltage VSWR to meet certain requirements, because in the broadband application of a wide range of frequencies, the VSWR will change with the frequency, the impedance should be matched as far as possible in a wide range.Meaning of VSWR:VSWR is a numerical value that indicates whether the antenna and the radio transmitter are matched. If the value of SWR is equal to 1, it means that the waves transmitted to the antenna are not reflected and are all emitted, which is the ideal situation. If the value of SWR is greater than 1, it means that some of the waves are reflected back and eventually turn into heat, causing the feed line to warm up. The reflected waves can also generate quite high voltages at the output of the transmitter, potentially damaging the transmitter.

Omni ceiling antenna is also called Ceiling mount omni directional antenna.It is for in-building applications such as DAS. The low pim antenna is vertically polarized and operates at 380-6000 MHz supporting also public safety frequencies (TETRA). How to choose a correct antenna to achieve the purpose of amplifying the signal and transmitting it? Usually we can see ceiling antennas like small mushrooms on the top of subways, railway stations, airports and large shopping malls. It's connected by jumper cable with RF passive components.

The difference between GPS antenna and GSM antenna: 1. Different antenna types: GPS antenna is a circularly polarized antenna and GSM antenna is a linearly polarized antenna for satellite communication; 2. Different uses: GPS antenna is used for satellite communication and GSM antenna is used for mobile communication; 3. Different frequencies: the frequency of GPS antenna is 1575MHz , 42 plus or minus 10 MHz; GSM antenna uplink 890 to 909 MHz; Downlink 935 to 954 MHz. They both can be made as high gain antenna. 

Antenna downtilt mode can be divided into mechanical downtilt and electric downtilt. Mechanical downtilt antenna tilts the antenna only when it is erected, which is cheaper and is mostly used in the environment with downtilt angle less than 10 °. electronic downtilt antenna is expensive, and its downtilt angle range is large (more than 10°). When the downtilt angle is large, the antenna pattern has no obvious distortion, and the antenna back lobe will also be downtilt. For the case that the downtilt angle is large, the fixed electric downtilt antenna with small angle plus mechanical downtilt scheme is often adopted. The dip angle is measured by a slope meter.

In RF engineering, when discussing antennas, SISO and MIMO now apply to the number of antenna "inputs" and antenna "outputs" that a communication channel between two or more devices may have. In this case, the SISO RF system will have only a single antenna from one device and a single antenna from another device. Unlike control engineering, the number of "inputs" and "outputs" does not refer to the inputs and outputs of the communication system, but rather to the antennas in the spatial multiplex scheme. Using the MIMO RF antenna, the number of antennas sent from one device and the number of antennas received from another device determine the order of the MIMO channels (TX antenna x RX antenna） Using the SISO antenna system, signals sent from a device will interact with the environment and will be absorbed or reflected according to these environmental variables. Eventually, the signal energy from the SISO antenna system can reach the receiving antenna from one or more spatial paths. In this case, the path with the highest signal energy is ideal because it is usually the least attenuated or distorted. Signals from other paths can actually be interfering because they can degrade or delay due to interaction with the environment.   For MIMO systems, these multi-space paths from one device to another are used to enhance communication between two devices, either by increasing the number of active streams used or by increasing the reliability of communication channels. Both methods can improve throughput by increasing channels or improving channel quality, reducing errors, and using channel capacity more efficiently.