Multi-star Multi-frequency Spiral Antenna

Multi-star Multi-frequency spiral antenna

Multi-star Multi-frequency spiral antenna is a cutting-edge technology that revolutionizes the field of wireless communication. This innovative antenna design offers numerous advantages over traditional antennas, making it a preferred choice for various applications. With its multi-star configuration, the antenna provides enhanced signal strength and coverage, ensuring reliable and efficient communication across multiple frequencies. The spiral shape of the antenna allows for compact size and easy integration into various devices, making it ideal for use in smartphones, tablets, and other portable devices. Furthermore, the multi-frequency capability of the antenna enables seamless connectivity in diverse environments, eliminating the need for multiple antennas. Overall, the multi-star multi-frequency spiral antenna is a game-changer in the world of wireless communication, paving the way for faster, more reliable, and versatile connectivity options.

Spiral antennas are capable of dual polarized operation if the currents can propagate along their arms by going either out or in through the radiation region of the spiral. The wrapping sense of the spiral determines the polarization of the radiated field resulting from this current flow. There are two ways to accomplish this phenomenon over very wide bandwidths. Specifically, either have a feed point for the spiral both outside and inside the radiation region, or use of the modulated arm width (MAW) spiral antenna. The MAW spiral antenna has not been widely accepted and is seldom reported in open literature. Its geometry is however sufficiently unique from the other planar frequency independent (FI) antennas to require a complete explanation of where it fits for different applications, specifically RF sensing. The design of the MAW spiral antenna is detailed herein including geometry described by modulation period, modulation magnitude, expansion rate, total number of arms, feed point structure, termination, cavity, feeding and dielectric effects. The emphasis is on detailed understanding of its performance characteristics such as impedance, pattern control and quality. The relevance of these characteristics to the antenna being used as a sensor is explained. The specific concerns being quantified are location by angle of arrival techniques and polarization detection.

Four arm spiral antenna, multi star, multi frequency, five star, eight frequency, centimeter level high-precision smart agriculture

Four-start Multipatch GNSS active antenna has been carefully designed to work well on multiple GPS, GLONASS, Galileo, BeiDou, SBAS, QZSS, IRNSS and L bands, leading to higher location accuracy and stability of tracking in urban environments. The Four-star MultiPatch antenna design has an even gain across the hemisphere giving almost perfect axial ratio which makes it resilient to multipath rejection. The internal LNA provides excellent out of band rejection performance providing excellent positioning stability and reliability of GNSS signals. For RTK applications when used on the base and/or the rover, can achieve genuine centimetre level accuracy. This antenna intended to be used with all-bands GNSS modules.