High-Performance Dual-Circularly Polarized Reflector Antenna Feed

Lim, Joo-Young; Jargalsaikhan, Nyambayar; Yun, Je-Young; Kim, Dong-Hyun; Kim, Tae-Hyung; Ahn, Bierng-Chearl; Bang, Jaehoon

doi:10.4218/etrij.14.0114.0118

Cited by 8 publications

(6 citation statements)

References 8 publications

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“…There are alternative structures (methods) for circular polarization in literature. Septum polarizers are used in hemispherical antennas (Lim et al., 2014; Sivareddy et al., 2011; Turkmen & Secmen, 2016a), whose production requires high precision, however. 90° hybrid phase shifters (Zagriatski & Bialkowski, 2004), or slots/strips on dielectric resonator antennas (DRA, Khalily et al., 2014; Li & Leung, 2013; Pan & Leung, 2012) are also used, all of which contain dielectric materials.…”

Section: Introductionmentioning

confidence: 99%

Single Waveguide Feed Omnidirectional and Circularly Polarized Transceiver Waveguide Slot Antenna for Satellite Communication Applications

2022

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In 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 TE10 mode to circular TM01 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.

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Section: Introductionmentioning

confidence: 99%

Single Waveguide Feed Omnidirectional and Circularly Polarized Transceiver Waveguide Slot Antenna for Satellite Communication Applications

2022

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“…This method is very practical and easy to produce, when compared the other methods used in practical satellite applications. Alternative structures (methods), which are used for axial ratio reduction, can be listed as; septum polarizers (Lee, ; Lim et al, ; Shivam et al, ; Sivareddy et al, ; Turkmen & Secmen, ), 90° hybrid phase shifter (Sierra‐Castaner et al, ; Zagriatski & Bialkowski, ), or slots/strips on dielectric resonator antennas (Khalily et al, ; Li & Leung, ; Pan & Leung, ). Septum polarizers are used for hemispherical antennas, which have wide coverage in both azimuth and elevation planes (Lee, ; Lim et al, ; Sivareddy et al, ; Turkmen & Secmen, ).…”

Section: Introductionmentioning

confidence: 99%

“…In order to obtain nondirectional radiation pattern, the combinations of the multiple antennas are used. Most commonly used antenna combinations can be listed by using two identical choke‐horn (hemispherical) antennas, which are located 180° opposite to each other (Lim et al, ; Turkmen & Secmen, ; Zhang et al, ), or using two identical omnidirectional antennas, which are placed as perpendicular to each other (Quan et al, ; Top & Dogan, ; Turkmen, ; Turkmen & Secmen, ). Perfect nondirectional radiation pattern cannot be obtained; however, it can be approximately formed by using these techniques.…”

Section: Introductionmentioning

confidence: 99%

Omnidirectional and Circularly Polarized Slotted Antenna Array With Increased Bandwidth Performance by Using Nonidentical Waveguide Slots

Turkmen

Seçmen

2018

Radio Science

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In this paper, the design, production, and results of an omnidirectional and circularly polarized antenna for satellite communication applications such as telemetry or telecommand are explained. The antenna is fed by a special transition structure between rectangular waveguide to circular waveguide in order to provide symmetrical circular waveguide mode of TM01 and eliminate dominant but asymmetric mode of TE11. The radiation part on the antenna has the geometry of inclined waveguide slots placed in a rotationally symmetric way on a circular waveguide and two radially outward parallel cylindrical plates in order to provide circular polarization. In the design of the antenna, nonidentical slots are used on the circular waveguide where half of the total number of slots is reduced to increase the bandwidth of the antenna. The realized antenna is found to give about 5–6% impedance bandwidth around 12 GHz where it is just approximately 2.5% when all slots in array are identical. The usage of nonidentical slots results in degradation of gain variation and axial ratio performances as compared to the antennas with identical slots; however, it still performs gain variation less than 3 dB over full azimuth plane, and axial ratio under 3 dB over full azimuth plane and elevation beamwidth of minimum 50° for the given bandwidth.

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“…Various methods of realizing a low gain (6-12 dB) antenna with dual linear or dual circular polarization have been established which include crossed dipoles [1,2], dual-fed patches [3], waveguide apertures [4], crossed slots [5], and dielectric resonators [6].…”

Section: Introductionmentioning

confidence: 99%

A New Dual Circularly Polarized Feed Employing a Dielectric Cylinder-Loaded Circular Waveguide Open End Fed by Crossed Dipoles

Bang¹,

Choi²,

Noh³

et al. 2016

International Journal of Antennas and Propagation

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This paper presents a new dual circularly polarized feed that provides good axial ratio over wide angles and low cross-polarized radiation in backward direction. A circular waveguide open end is fed with two orthogonally polarized waves in phase quadrature by a pair of printed crossed dipoles and a compact connectorized quadrature hybrid coupler. The waveguide aperture is loaded with a dielectric cylinder to reduce the cross-polarization beyond 90 degrees off the boresight. The fabricated feed has, at 5.5 GHz, 6.33-dBic copolarized gain, 3-dB beamwidth of 106°, 10-dB beamwidth of 195°, 3-dB axial ratio beamwidth of 215°, maximum cross-polarized gain of −21.4 dBic, and 27-dB port isolation. The reflection coefficient of the feed is less than −10 dB at 4.99–6.09 GHz.

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High-Performance Dual-Circularly Polarized Reflector Antenna Feed

Cited by 8 publications

References 8 publications

Single Waveguide Feed Omnidirectional and Circularly Polarized Transceiver Waveguide Slot Antenna for Satellite Communication Applications

Single Waveguide Feed Omnidirectional and Circularly Polarized Transceiver Waveguide Slot Antenna for Satellite Communication Applications

Omnidirectional and Circularly Polarized Slotted Antenna Array With Increased Bandwidth Performance by Using Nonidentical Waveguide Slots

A New Dual Circularly Polarized Feed Employing a Dielectric Cylinder-Loaded Circular Waveguide Open End Fed by Crossed Dipoles

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