Wideband Horizontally Polarized Omnidirectional Antenna With a Conical Beam for Millimeter-Wave Applications

Fan, Kuikui; Hao, Zhang‐Cheng; Yuan, Quan; Hu, Jun; Luo, Guo Qing; Wang, Hong

doi:10.1109/tap.2018.2851363

Cited by 57 publications

(23 citation statements)

References 28 publications

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“…Measured |S11| and |S22| parameters are under -10 dB in Fig. 16(a) for the lower band (26)(27)(28)(29)(30) and in Fig. 16(b) for the higher band (37-40 GHz), respectively.…”

Section: Measurementsmentioning

confidence: 98%

“…Millimeter-wave conical-beam antenna designs based on microstrip [25]- [26] or Substrate Integrated Waveguide (SIW) technology [27]- [28] are attractive due to their low cost and low profile. Other millimeter-wave conical-beam antennas have been proposed as well, such as a circular loop of dipoles [29], circular aperture antennas fed by coaxial probes [30], a spiral shape antenna [31] or a radial line slotted array antenna [32]. Most of the published works related to high-gain conical-beam antennas only provide peak realized gains lower than 8 dBi due to its associated omnidirectional azimuthal radiation pattern.…”

Section: Introductionmentioning

confidence: 99%

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Dual-Polarization and Dual-Band Conical-Beam Array Antenna Based on Dual-Mode Cross-Slotted Cylindrical Waveguide

2021

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Two designs of conical-beam array antennas are presented for different fifth-generation applications. They are based on slotted cylindrical waveguides and a travelling-wave topology, where the waveguide is used to progressively excite a cross-slot array. A total of 384 cross-slots, formed by transversal and longitudinal slots, are grouped in rings of eight equally-spaced cross-slots. The propagation of TM01 and TE01 modes in the cylindrical waveguide can provide dual polarization by the independent excitation of transversal and longitudinal slots, respectively. Firstly, a dual linearly-polarized antenna design in the 37-40 GHz band is presented, conforming a high-gain conical-beam pattern. Secondly, a similar antenna design working in the 5G dual-band of 26-30 GHz and 37-40 GHz is also presented. In this last case, transversal and longitudinal slots are designed to radiate at the two different frequency bands of 26-30 GHz (vertical polarization) and 37-40 GHz (horizontal polarization), recently assigned for very high-speed 5G applications. In order to experimentally validate the proposed topologies, the dual-band design has been prototyped by combining 3D-printing and CNC milling techniques, providing high experimental performance. Directive tilted omnidirectional coverages with peak realized gains around 14 dBi have been obtained, as well as a total efficiency between 83% and 90% for both frequency bands.

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“…Measured |S11| and |S22| parameters are under -10 dB in Fig. 16(a) for the lower band (26)(27)(28)(29)(30) and in Fig. 16(b) for the higher band (37-40 GHz), respectively.…”

Section: Measurementsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Dual-Polarization and Dual-Band Conical-Beam Array Antenna Based on Dual-Mode Cross-Slotted Cylindrical Waveguide

2021

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“…However, this antenna is hard to match to a 50 Ω feed line owing to its unacceptable reactance and radiation resistance. To realize good radiation pattern and impedance matching, many modified loop antennas such as the Alfred loop antenna and its modifications, 7–8 segmented loop antenna, 9–10 and circular loop antenna 11 have been studied. However, their bandwidth is less than 35%.…”

Section: Introductionmentioning

confidence: 99%

Wideband horizontally polarized omnidirectional antenna with small gain variation

Liu

et al. 2022

Micro & Optical Tech Letters

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A wideband horizontally polarized omnidirectional antenna with slight gain variation is proposed. It includes four curved dipoles, two groups of parasitic strips, and a wideband feeding network. The curved dipoles are printed on a dielectric cylindrical shell in a compact size to achieve horizontally polarized omnidirectional radiation. Four parasitic strips are embedded between the dipoles to reduce the gain variation and enhance the impedance. A 35 Ω coaxial cable serving as a quarter‐wavelength impedance transformer is used to design the feeding network without increasing the overall dimension of the antenna. The bandwidth of the proposed antenna achieves 77% (2.3–5.2 GHz) for VSWR <2 and a small gain variation less than 1.6 dB over the operating band.

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“…Many more efforts have focused on the development of OHP radiating loop designs. Examples include the original Alford loop [9] and its modifications [10] - [12]; segmented loops [13] - [16]; cross dipoles [17] - [19]; and multiple curved dipoles excited by feed networks [20] - [25]. All of these OHP antenna designs realize a single magnetic dipole radiator with low directivity.…”

Section: Introductionmentioning

confidence: 99%

High-Directivity, Compact, Omnidirectional Horizontally Polarized Antenna Array

Lin

Ziolkowski

2020

IEEE Trans. Antennas Propagat.

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Omnidirectional horizontally polarized (OHP) X-band magnetic dipole antenna arrays are reported that simultaneously achieve high directivity and wide bandwidth while being compact in size. A major innovation is the seamless integration of several phase inverters into an electrically long TE 0.5,0 mode open waveguide. The resulting open structure radiates as a collinear series of magnetic dipole sections. The inverters facilitate the realization of in-phase electric fields along its entire length and, hence, phase coherence between all of these magnetic dipoles. Each phase inverter is realized as a combination of a meandering slot on one metallic surface of the waveguide and several shorting vias surrounding it. Two such multi-staged (sixand eight-element) collinear OHP magnetic dipole arrays were designed and optimized. Prototypes of both were fabricated with standard, low-cost PCB manufacturing technology. The volume of the six-element (eight-element) OHP array is only 0.07 × 0.22 × 3.3 𝝀𝝀 𝟎𝟎 𝟑𝟑 (0.07 × 0.22 × 4.3 𝝀𝝀 𝟎𝟎 𝟑𝟑 ); it achieves a measured 8.2 dBi (10.4 dBi) peak realized gain. The measured overlapping -10-dB impedance and 3-dB realized gain bandwidth was 8% in both cases. These designs are ideal for wireless applications requiring thin high directivity HP sources covering the entire azimuthal plane.

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Wideband Horizontally Polarized Omnidirectional Antenna With a Conical Beam for Millimeter-Wave Applications

Cited by 57 publications

References 28 publications

Dual-Polarization and Dual-Band Conical-Beam Array Antenna Based on Dual-Mode Cross-Slotted Cylindrical Waveguide

Dual-Polarization and Dual-Band Conical-Beam Array Antenna Based on Dual-Mode Cross-Slotted Cylindrical Waveguide

Wideband horizontally polarized omnidirectional antenna with small gain variation

High-Directivity, Compact, Omnidirectional Horizontally Polarized Antenna Array

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