12/24/2023 0 Comments Visual studio reflector![]() In this design, l = 2.3 λ 0 is finally determined. In addition, the symmetry of the H-plane pattern is not affected by the change in l. However, if l continues to increase, then the E-plane pattern will tilt in the opposite direction. As l increases, the maximum gain of the antenna slightly decreases, and the pattern tends to be flat. Since the edge area of the reflector is asymmetric along the y direction, the E-plane pattern of the antenna is also asymmetric. Figure 5 shows the influence of different l values on the pattern of the antenna. ![]() We use full wave analysis software CST Studio Suite to simulate the performance of the antenna. 4b, the center of the edge area o does not coincide with the center of the middle region o′, which can solve the problem of asymmetry of the radiation pattern in the y direction caused by irregular cutting of the edge area.Īs mentioned above, o and o′ do not coincide, and the offset l between them affects the performance of the reflector. When w 1 and w 2 are determined, the ratio of the two modes (0 and π) can be adjusted by adjusting the radius r 1 of the middle circular area. The antenna can be used for satellite constellation tracking and other systems that require high-gain flat-top beams. The antenna has an impedance bandwidth of 19.4% from 2.8 to 3.4 GHz (VSWR| ≤ 1.5), a flat top pattern is achieved in the range of ± 2° in two dimensions, and the gain fluctuation is less than 1 dB. Then, based on multimode reflector theory, two antiphase modes are generated in the maximum radiation direction of the biased reflector antenna so that a flat-topped or slightly concave pattern can be realized. To solve the above problems, a new concept of a multimode reflector is proposed in this paper. After many simulations, our team verified that it is difficult to achieve a high-gain and narrow-beamwidth flat-top pattern using traditional shaped reflector theory and that it is even more difficult to achieve a two-dimensional flat-top beam. However, the beam of high-gain antennas suitable for satellite systems is generally very narrow, and the gap between θ 1 and θ 2 in Fig. In this range, the radiation level fluctuation is less than 0.6 dB, and the gain is more than 20 dB. 6, this method is used to design a biased reflector antenna operating at 19–22 GHz, which realizes a one-dimensional flat-top beam within ± 8° of the azimuth plane. This method can feasibly achieve a wide-beam flat top pattern over a wide range of angles. 2 is taken as the objective function to design the mid-transversal of the reflector 4, 5, 6. ![]() To design a reflector antenna with a flat-topped rectangular radiation pattern, the preferred solution is based on the theory of a shaped reflector that is, the flat-topped pattern shown in Fig. 3, a low-Earth orbit satellite constellation scheme suitable for air traffic control is designed, which can realize global real-time air traffic monitoring. ![]() In reference to the atmospheric and oceanic data issued by the World Meteorological Organization, three remote sensing NanoSats satellite constellation schemes are designed in 2, which can meet the minimum data requirements of numerical weather forecasting and other meteorological applications. ![]() For example, the characteristics of mobile communication satellite constellations in the mid-orbit zone are studied in 1, and 10 constellation networking schemes are proposed, which can provide mobile communication services for more than 85% of people in the world. 1, to realize the function of a large satellite 1, 2, 3. Especially in Nanosats and CubeSats networking, multiple small satellites can be used to form a constellation, as shown in Fig. Therefore, it has become a new trend of satellite services to use a multi-satellites “accompanying flight” network for data transmission. In recent years, with the rapid increase in data traffic in navigation, remote sensing, communication and other satellite services, it has been difficult for a single satellite to meet the increasing application needs. ![]()
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