Design of polyrod antenna having isoflux radiation characteristic for satellite communication systems

Abstract

In satellite communication, link margin and therefore antenna radiation characteristics are key factors to ensure providing a robust communication link between space and ground segment. For telemetry/telecommand and payload data transfer, isoflux antennas are employed widely in satellite communication systems to direct electromagnetic wave efficiently. To decrease complexity and manufacturing cost, simple antenna structures are preferred. In this study, after a detailed literature survey, a polyrod antenna has been designed to use in the space segment of Low Earth Orbit satellite communication subsystem. The proposed polyrod antenna has maximum gain at about 60 0 elevation angle of the antenna. Moreover, its impedance bandwidth is 750MHz (11%) that is fairly adequate to use in high data rate transmitters. By using CST Microwave Studio TM which is a commercially available 3-D electromagnetic time-domain solver, directivity, gain, axial ratio for elevation plane at X-Band, and return loss characteristic have been presented. Based on the obtained results, the designed polyrod antenna can be used where a conical shaped beam radiation pattern is needed.

An Innovative Design of Isoflux Scanning Digital Phased Array Based on Completely Shared Subarray Architecture for Geostationary Satellites

“…According to Equation ( 6), using H=36,000 kilometersfor geostationary satellites, Figure 3 shows the normalized space loss variation within 8 8  −   .…”

“…There are many studies for antennas that have isoflux radiation characteristics in the literature [8][9][10][11][12][13][14][15]. Volkan Akan presented a polyrod antenna that has an isoflux radiation characteristic for satellite communication systems in [8].…”

Choke ring horn antenna design for satellite payload data transmitters

“…These are generally earth observation, non-optical remote sensing, meteorological missions for weather forecast, scientific and research missions, data broadcasting and, also Internet of Things (IoT). [1][2][3][4][5][6][7][8][9][10][11][12][13] Furthermore, to perform different duties on the satellite there are different types of communication systems. Those are telemetry/telecommand (TM/TC), payload data transmitter (PDT), inter satellite link (ISL) communication subsystems, etc.…”

S-Band Stepped Septum Polarizer Design and Analysis

“…Bu görevler optik ya da mikrodalga enstrümanlarla yer gözlem, bilimsel araştırma, veri haberleşmesi, IoT için internet yayını sağlama vb. olarak sayılabilir (Akan ve Yazgan, 2010;Imbriale, 2012;Akan ve Dudak, 2014;Akan, 2015;Akan ve ark., 2017;Akan, 2020;Akan ve Yazgan, 2020). Bunun yanında yer sabit uydularda da haberleşme alt sistem ve donanımları oldukça önemli bir yere sahiptir.…”