Study of dual-polarized omni-directional antennas for 5.2 GHz-band 2/spl times/2 MIMO-OFDM systems

Ando, A.; Kita, Naoki; Yamada, Wataru; Itokawa, Kiyohiko; Satô, Akio

doi:10.1109/aps.2004.1330533

Cited by 7 publications

(6 citation statements)

References 2 publications

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“…Yet these antennas are developed for 5.2GHz-band 2x2MIMO-OFDM systems. Main polarization component mainly decides the changes in radiation pattern 6 . Dual-band planar microstrip antennas are already designed and used for Global Navigation Satellite System (GNSS) based remote sensing applications 7 .…”

Section: Introductionmentioning

confidence: 99%

Dual band double square microstrip antenna for wireless applications

Sharma

Kumar

2013

SPIE Proceedings

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A dual band double square patch with 2-bridges printed microstrip patch antenna is presented in this paper. The antenna operates at centre frequencies of 2.4GHz and 9.7GHz which can be used for wireless local area networks and radio navigation or radio location applications in S-band and X-band respectively at low powers. The dual band antenna has good simulated return loss and bidirectional radiation characteristics. The electromagnetic (EM) simulation software is used for the simulation. The antenna is designed on FR-4 substrate with dielectric constant of 4.4 and thickness of 1.6 millimeter(mm). It is fed with 50Ω coaxial feed line and the total size of antenna is 40×40 mm 2 . The antenna has return loss lower than -10dB, compact structure, ease of designing, and low manufacturing cost. Two square patches are designed to obtain dual band operation. The larger patch resonates at 2.4GHz and the smaller patch resonates at 9.7GHz respectively. This antenna can be used for wireless local area network (WLAN) and radio navigation applications.

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Section: Introductionmentioning

confidence: 99%

Dual band double square microstrip antenna for wireless applications

Sharma

Kumar

2013

SPIE Proceedings

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“…Dual‐polarized omnidirectional antennas are widely used for various applications such as mobile communications, ground based communication systems, electronic warfare, and target detection systems . In some modern communication systems, it is required for antennas in base stations to have a broad bandwidth.…”

Section: Introductionmentioning

confidence: 99%

Design of a dual-polarized omnidirectional antenna for broadband applications

Dastranj

Arand

2015

Int J RF and Microwave Comp Aid Eng

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A broadband dual-polarized omnidirectional antenna is presented. The proposed antenna consists of two parts, an asymmetric biconical antenna and a cylindrical multilayer polarizer. To have an almost perfect omnidirectional radiation pattern in the horizontal plane and the main radiating beam position at around h575 8 , in the elevation plane, the asymmetric biconical antenna is used. Moreover, to provide dual polarization performance over the 2-18 GHz operational bandwidth, a multilayer polarizer is designed and optimized. Numerous simulations via Ansoft HFSS and CST microwave Studio CAD tools have been made to optimize the radiation pattern, gain, polarization, and the reflection coefficient of the antenna. Simulation results show that the radiation characteristics of the proposed antenna are extremely sensitive to the configuration and dimensional parameters of the multilayer polarizer. The designed antenna was fabricated with high mechanical accuracy and measured. Satisfactory agreement of computer simulations and experimental results was obtained. The main feature that distinguishes this antenna from the previous designs is the ability to provide the omnidirectional radiation pattern with small ripples, dual polarizations performance, and the wide bandwidth simultaneously. Based on these characteristics, the proposed antenna can be useful for broadband communication applications. V C 2015 Wiley Periodicals, Inc. Int J RF and Microwave CAE 25:591-600, 2015.

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“…The reported SFBHAs, to the best knowledge of authors, are the lowest profile CP antennas without ground plane with their heights range from 0.03λ to 0.1λ. The previously reported CP antennas include frequency independent antennas of height ≥ 2λ [27], orthogonally oriented vee dipoles of height ≥ 0.5λ [9] and dual polarized omnidirectional antenna of height 0.87λ [33]. The proposed antennas can be scaled for any frequency as along as its size remains reasonable.…”

Section: Introductionmentioning

confidence: 99%

Design of Circularly Polarized Omnidirectional Bifilar Helix Antennas With Optimum Wide Axial Ratio Beamwidth

Yousaf¹,

Amin²,

Iqbal³

2013

PIER C

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Abstract-In this paper, design and analysis of omnidirectional single feed circularly polarized, wide axial ratio beamwidth resonant side-fed bifilar helix antennas that do not require a ground plane is presented. The simulation and measurement results show that side-fed helix antennas of various radii gives near perfect circular polarization (CP) almost over the whole sphere except at and around nulls, at a certain turn angle by properly proportioning the area of loop (A) with the product of pitch (ρ) and radianlength (l ) of helix. Helix antennas with smaller radii give axial ratio (AR) close to one at higher values of turn angle with lower value of resonant input impedances but CP is less sensitive to inaccuracy in turn angle. However helix antennas with larger radii results in AR close to one at lower values of turn angle and provides better values of input resistance but its AR is more sensitive to variations in turn angle. The simulated results show that the polarization solid angle beamwidth (for AR ≤ 3 dB) varies from 3.96π to 4π steradian. The gain and 3 dB beamwidth of the antennas are 2 dBi and 90 • respectively. The polarization bandwidth varies from 34% to 65%. The simulated results are verified by experimental measurements.

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Study of dual-polarized omni-directional antennas for 5.2 GHz-band 2/spl times/2 MIMO-OFDM systems

Cited by 7 publications

References 2 publications

Dual band double square microstrip antenna for wireless applications

Dual band double square microstrip antenna for wireless applications

Design of a dual-polarized omnidirectional antenna for broadband applications

Design of Circularly Polarized Omnidirectional Bifilar Helix Antennas With Optimum Wide Axial Ratio Beamwidth

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