Research on circularly polarized conical-beam antennas

Kawakami, Haruo; Sato, G.; Wakabayashi, Ryoji

doi:10.1109/74.598558

Cited by 53 publications

(27 citation statements)

References 20 publications

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“…It can achieve higher antenna gain using a impedance matching than a PMA due to the enlarged effective aperture, whereas it also has a null in the zenith direction [45]. However, the PMAA with equal-amplitude power and quadruple phase delay in the operating frequency range can remove the null of a radiation pattern at θ = 0 • , and it has the circular polarization in step III [43,46].…”

Section: Antenna Design Proceduresmentioning

confidence: 99%

A Wideband Planar Monopole Antenna Array With Circular Polarized and Band-Notched Characteristics

Lee¹,

Oh²,

Yu³

2012

PIER

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Abstract-A wideband circular polarized planar monopole antenna array (PMAA) that employs dual band-notched characteristics is presented in this paper. The proposed antenna array is formed by four pinwheel-shaped folded planar monopole antennas (PMAs) in order to improve the performance of circular polarization and high directivity. Also, it achieves low-profile, small-sized structure. The attractive characteristics of the proposed PMAA are a wide impedance bandwidth of 87.3% (1 GHz to 2.55 GHz), the 3 dB axial-ratio (AR) bandwidth of 92.3% (1.05 GHz to 2.85 GHz) excluding dual notch bands, the total bandwidth of 35% (1.8 GHz to 2.55 GHz), and the maximum gain of 8.24 dBic within the total bandwidh. Moreover, in order to generate dual band-notched characteristics in a circular polarized antenna, a folded PMAA with multiple U radiators and inverted W slots is proposed.

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Section: Antenna Design Proceduresmentioning

confidence: 99%

A Wideband Planar Monopole Antenna Array With Circular Polarized and Band-Notched Characteristics

Lee¹,

Oh²,

Yu³

2012

PIER

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“…Most omnidirectional antennas are linearly polarized or dual linearly polarized [3,[15][16][17][18], of which many configurations require ground plane [9][10][11][12][13][14][15][16][17][18][19][20][21]. Similarly CP omnidirectional antennas are of two categories, one which require ground plane (slot type or monopole type) [2,5,[22][23][24][25] and other which do not require ground plane (frequency independent antennas, Quadrifilar Helix Antenna (QHA) and orthogonally oriented vee dipoles) [26][27][28][29]. CP antennas which do not require ground plane are attractive for application where proper ground plane is not available, or ground plane is not suitable for use, such as high speed aerodynamic surfaces, Unmanned Aerial Vehicles (UAVs), mini UAVs made of composite material, and small handheld devices which cannot provide ground plane for monopole operation or devices made of non-metallic material [6].…”

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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“…For communication between a mobile station and stationary satellite a small circularly polarized conical beam antenna was designed. By changing the space between antenna elements and the inclination angle of the linear-antenna elements generates a CP conical beam in desired direction [4]. This antenna radiates in the desired direction by changing inclination angle.…”

Section: Introductionmentioning

confidence: 99%

Low Profile Omni directional Circularly Polarized Patch Antenna for WLAN Applications

Reddy¹

2015

IJIRCCE

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ABSTRACT-Circularly polarized (CP) antennas are widely used in modern wireless communication systems because of their immunity to multipath distortion and polarization mismatch losses. On the other hand, unidirectional radiation patterns are generally desirable since they can provide larger signal coverage and stabilize the signal transmission. As a result various Omni directional CP antennas have been proposed and investigated over the past few years. The design utilizes two monopole modes of a circular patch which connects to a modified ground plane by a set of conductive pins, to achieve wide-band impedance matching. The curved branches introduced at the edge of circular ground plane excite a degenerate mode and create CP fields. To verify the design, a prototype should be fabricated operating at 2.4GHz-WLAN band and measured reflection coefficient, radiation pattern, and antenna gain should agree well with simulation results. In this paper simulation carried out using arlonAD320A instead of RogersRT/duroid 5880 because cost of Rogers material is very expensive. But losses in arlon material are more. The losses are reduced by decreasing number of shorting pins and increase the radius of shorting pins. The prototype as a low profile 0.024 0 , a return loss value30dB and a antenna gain of 4.68dB. To further characterize the design concept, a parametric study of the antenna is carried out using HFSS.

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Research on circularly polarized conical-beam antennas

Cited by 53 publications

References 20 publications

A Wideband Planar Monopole Antenna Array With Circular Polarized and Band-Notched Characteristics

A Wideband Planar Monopole Antenna Array With Circular Polarized and Band-Notched Characteristics

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

Low Profile Omni directional Circularly Polarized Patch Antenna for WLAN Applications

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