Ceyhan TürkmenEsra AlkınMustafa SeçmenSecmen, M.Turkmen, C.Alkin, E.2025-10-0620221944799X, 004866040048-66041944-799X10.1029/2021RS0073052-s2.0-85125146017https://www.scopus.com/inward/record.uri?eid=2-s2.0-85125146017&doi=10.1029%2F2021RS007305&partnerID=40&md5=3f6326aee676f011e3f436dfe7a097f5https://gcris.yasar.edu.tr/handle/123456789/8746https://doi.org/10.1029/2021RS007305In this study an omnidirectional and circularly polarized transceiver antenna which can be used in simultaneous operations over transmit (TX) and receive (RX) channels for telemetry tracking and command (TTC) applications on the space segment of satellite communication is proposed. The radiation and feed parts of the antenna consist of waveguide structures for high power necessity in transmit (telemetry) section. The radiation part includes two different sections of rotationally symmetric slotted arrays on circular waveguide and radially outward metallic disks to improve omnidirectionality and circular polarization. The feed part contains a dual-band mod converter from rectangular TE<inf>10</inf> mode to circular TM<inf>01</inf> mode for symmetric field excitation over slots where the input of the converter is the standard rectangular waveguide. The design simulation and measurement results of the antenna are shown over a 3D printed prototype at Ku-band with center frequencies of 12 GHz and 14.25 GHz for TX and RX respectively. With thin slots in telemetry section and thick slots in telecommand section measured bandwidths for TX and RX frequencies are obtained approximately as 200 and 450 MHz respectively. While TX band with maximum 3 dB gain variation over azimuth maximum 3 dB axial ratio and minimum −3 dBi gain over 70° elevation beamwidth has relatively better performances at the expense of narrow bandwidth RX band has maximum 3.5 dB gain variation over azimuth maximum 4 dB axial ratio and minimum −6 dBi gain over 55° elevation beamwidth at the expense of wide bandwidth. © 2022 Elsevier B.V. All rights reserved.Englishinfo:eu-repo/semantics/closedAccessCircular Polarization, Omnidirectional Antenna, Satellite Communication, Slotted Waveguide Array, Telemetry, Tracking And Command (ttc), 3d Printers, Antenna Arrays, Antenna Feeders, Bandwidth, Circular Polarization, Microstrip Antennas, Microwave Antennas, Omnidirectional Antennas, Radio Transceivers, Rectangular Waveguides, Satellite Antennas, Satellite Links, Satellites, Slot Antennas, Waveguide Components, Axial Ratio, Beam Widths, Circularly-polarized, Communication Application, Gain Variations, Satellite Communications, Slotted-waveguide Arrays, Tracking And Command (telemetry Tracking And Command), Transceiver Antennas, Waveguide Slot Antennas, Satellite Communication Systems3D printers, Antenna arrays, Antenna feeders, Bandwidth, Circular polarization, Microstrip antennas, Microwave antennas, Omnidirectional antennas, Radio transceivers, Rectangular waveguides, Satellite antennas, Satellite links, Satellites, Slot antennas, Waveguide components, Axial ratio, Beam widths, Circularly-polarized, Communication application, Gain variations, Satellite communications, Slotted-waveguide arrays, Tracking and command (telemetry tracking and command), Transceiver antennas, Waveguide slot antennas, Satellite communication systemsTelemetrySatellite CommunicationOmnidirectional AntennaTracking and Command (TTC)Circular PolarizationSlotted Waveguide ArrayArticle