Omnidirectional circularly polarized slot antenna fed by a cylindrical waveguide in millimeter band

Masa‐Campos, José Luis; Fernández, José M.; Sierra‐Pérez, M.; Fernández-Jambrina, J.L.

doi:10.1002/mop.22207

Cited by 19 publications

(12 citation statements)

References 5 publications

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“…Adjacent resonant frequencies are selected to be close to each other, which makes the antenna wideband. This technique provides lower gain variation in much wider bandwidth as compared to other similar studies in literature (Masa‐Campos et al, , ; Top & Dogan, ; Turkmen & Secmen, b), which can be considered as the main novelty of this study. Besides, the proposed structure has mentioned superiorities over the other relevant antennas in terms of complexity, compactness, easy integration with other waveguide components, high power capability, high radiation efficiency, bandwidth, and omnidirectional circular polarization performance.…”

Section: Introductionmentioning

confidence: 78%

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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Section: Introductionmentioning

confidence: 78%

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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“…Böylece dairesel dalga kılavuzunda ilerleyen dalga, yürüyen dalga (traveling wave) olup yapıdaki anten dizisi rezonans olmayan bir anten dizisi olarak düşünülebilir. Diğer çalışmalarda [2][3][4] benzer dairesel dalga kılavuzlarının en üst kısımları genellikle kısa devre ile sonlandırılmış ve en iyi performansı sağlamak amacıyla kısa devreye en yakın yarık dizisinin kısa devreye uzaklığı λ g,01 /4 olarak ayarlanmıştır. Fakat bu durum antenin geniş frekans bandında çalışmasını kısıtlayan bir etken olup antenin özellikle geri dönüş kaybı performansı açısından dar bantta çalışmasına sebep olmaktadır.…”

Section: Anten Yapisi Ve Tasarimiunclassified

“…Literatürde bu amaçla kullanılmak üzere tasarlanmış birtakım antenler ve ilgili çalışmalar [1][2][3][4] bulunmakla beraber bu çalışmalardaki antenlerin genellikle 10 dB geri dönüş kaybına ait frekans bantlarının yüzde 1 gibi dar değerlere sahip olduğu gözlemlenmiştir. Fakat bu bant genişlikleri özellikle geniş bantlı uydu haberleşmeye cevap veremeyebilir.…”

Section: Introductionunclassified

The design of an omnidirectional and circularly polarized Ku-band antenna for satellite communication

Turkmen

Seçmen

2015

2015 23nd Signal Processing and Communications Applications Conference (SIU)

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Özetçe-Bu çalışmada yanca ekseninde yönsüz ve dairesel kutuplanmaya sahip bir Ku-bant antenden bahsedilmektedir. Anten yapısı dairesel dalga kılavuzu üzerine açılmış iki eğimli yarık dizisinden oluşmaktadır ve dairesel dalga kılavuzu uyumlu devre ile sonlandırılmıştır. Anten yapısı dikdörtgen bir dalga kılavuzuyla beslenmektedir ve dikdörtgenden dairesel dalga kılavuzuna bir geçiş vardır. Tasarlanan antenin 10 dB geri dönüş kaybı bandı yaklaşık yüzde 3 civarı olup bu bant genişliği Ku-bant uydu haberleşmesi için uygun bir bant genişliğidir. Bandın büyük bir bölümünde eksensel oran dairesel kutuplanmayı sağlayacak şekilde düşüktür. Antenin yanca eksenindeki ışıma örüntüsü oldukça düzgün olup bu eksende tasarlanan antenin yönsüz karakteristiğe sahip olduğu söylenebilir. Anahtar Kelimeler -dairesel dalga kılavuzu; dairesel kutuplanma; uydu haberleşmesi; yarık anten.Abstract-This study describes about a Ku-band antenna with almost circular polarization in omnidirectional azimuth direction. The antenna structure contains two sections of inclined slotted array on a circular waveguide, and the waveguide is terminated with a matched load. The structure is fed a rectangular waveguide and a rectangular-to-circular waveguide transition. The designed antenna has 10 dB return loss bandwidth is about 3 percent, which is usually sufficient for the most of the satellite communication applications in Ku-band. Besides, the axial ratio of the antenna is also sufficiently low within the most of the frequency band as providing circular polarization. Besides, the radiation pattern of the antenna at azimuth plane is uniform such that the designed antenna is said to have the omnidirectional characteristics at this plane.

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“…Sleeve dipole with parasitic elements [1], conformal slotpair arrays fed with TM 01 mode [2], or cross slots fed with two TE 11 modes [3] on circular waveguide have been used to obtain circularly polarized omni-directional antennas. In the presented work, circular polarization is achieved with a conformal single slot element on a circular waveguide, radiating into a parallel plate region.…”

Section: Introductionmentioning

confidence: 99%

A circularly polarized omni-directional low loss Ka-band slot antenna

Top

Dogan

2012

Proceedings of the 2012 IEEE International Symposium on Antennas and Propagation

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Design of a Ka-band low loss circularly polarized omni-directional slot array antenna is presented. The slot array is conformal on a circular waveguide and the slots are radiating into a parallel plate region for circular polarization. Elevation beam is directed to +10 degrees for the required elevation coverage of -10°/+30°. Simulation results show that the return loss is better than 20 dB in 1% bandwidth. Gain of the antenna greater than 1 dBi and the axial ratio better than 4.2 dB in the full sector of coverage.I.

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Omnidirectional circularly polarized slot antenna fed by a cylindrical waveguide in millimeter band

Cited by 19 publications

References 5 publications

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

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

The design of an omnidirectional and circularly polarized Ku-band antenna for satellite communication

A circularly polarized omni-directional low loss Ka-band slot antenna

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