Extremely Low-Profile, Single-Arm, Wideband Spiral Antenna Radiating a Circularly Polarized Wave

Nakano, Hisamatsu; Satake, R.; Yamauchi, Junji

doi:10.1109/tap.2010.2044345

Cited by 52 publications

(45 citation statements)

References 15 publications

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“…(2) Calculate the first-order radiation pattern F (1) (θ) in the digital domain by using the sum and difference value. (3) Compute the second-order radiation pattern F (2) (θ) by differentiating F (2) (θ) from the elevation angle θ.…”

Section: Hybrid Beamforming Algorithmsmentioning

confidence: 99%

“…However, it is difficult for conventional planar antennas to meet these requirements, such as a center-fed spiral antenna [2], planar inverted-F antenna PIFA [3] and a single-fed microstrip antenna [4,5], etc. On the other hand, multiple antennas [6,7] and their based beamforming [8][9][10][11] also can not be used in this systems because of their un-acceptable large array size reasons.…”

Section: Introductionmentioning

confidence: 99%

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A Compact Dual-Polarized Broadband Antenna With Hybrid Beam-Forming Capabilities

Peng

Wang²,

Mao³

et al. 2011

PIER

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Abstract-A broadband dual-polarized four-port (DPFP) antenna is presented in this paper, which consists of a radiation element and a feed network. It is very compact in size, with the diameter of 150.0 mm and the height of 47.0 mm, with the following unique properties: (1) it has hybrid beam-forming capability and operates at two modes, which depends on its excitation; (2) its operating frequency range is from 0.96 to1.78 GHz, and the return loss is about 10 dB; (3) its insertion loss is (3 ± 0.5) dB, with its balanced power splitting over the relative bandwidths of 37% at Mode 1 (180 • ± 5 • phase shifting) and 55% at Mode 2 (±5 • phase shifting), respectively; (4) an isolation of 30 dB at Mode 1 is obtained between the dual polarized ports, with the gain of 7.6 dBi and 42 • of the 3 dB-bandwidth at 1.25 GHz; and (5) the gain difference between Modes 1 and 2 is about 7 dB, within the angle of −15 • ≤ θ ≤ 15 • for the same polarization at 1.25 GHz. For the application of DPFP, a hybrid beam forming algorithm is proposed with an angular precision of 7 • and is validated by measurement.

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Section: Hybrid Beamforming Algorithmsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Compact Dual-Polarized Broadband Antenna With Hybrid Beam-Forming Capabilities

Peng

Wang²,

Mao³

et al. 2011

PIER

View full text Add to dashboard Cite

show abstract

“…The primary radiating elements of these antennas can be single-arm [1], two-arm [2][3][4], or four-arm [5] configurations with a large number of turns. Four-arm spiral antennas are considerably superior in performance to their single-and twoarm counterparts [6].…”

Section: Introductionmentioning

confidence: 99%

Single-Feed Composite Cavity-Backed Four-Arm Curl Antenna

Ta¹

2014

Journal of electromagnetic engineering and science

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A single-feed composite cavity-backed four-arm curl antenna is presented for use in global positioning systems (GPS). Its primary radiating element is fed by a vacant-quarter printed ring, which helps the antenna directly match to a 50-Ω coaxial line and produce a good circular polarization (CP). The cavity-backed reflector is employed to improve the CP radiation characteristics in terms of 3-dB axial ratio (AR) beamwidth and minimum AR value. The optimized design with an overall size of 90 × 90 × 25 mm 3 (0.4725 λo × 0.4725λo × 0.13 λo at 1,575 MHz) results in a |S11| < -10 dB bandwidth of 8.66% (1,514-1,651 MHz) and a 3-dB AR bandwidth of 2.23% (1,555-1,590 MHz). The antenna radiates a widebeam right-hand circular polarization and operates with a measured radiation efficiency greater than 90% within its impedance matching bandwidth. This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/ by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. ⓒ

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“…For the printed spiral with non-negligible arm width, the thin-wire assumption is less valid due to the fact that the currents will reside on the edges of metal strip. The analysis of them has been performed using various computational techniques, e.g., the finite-volume time-domain (FVTD) method [14], the finite-difference time-domain (FDTD) method [15][16][17][18][19][20], the finite element method (FEM) [21], and commercial full-wave solvers [22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Travelling Wave Mechanism and Novel Analysis of the Planar Archimedean Spiral Antenna in Free Space

Chen¹,

Huff²

2014

PIER

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Abstract-While Archimedean spiral antennas were invented a half-century ago, only selfcomplementary impedance can be evaluated directly from the Babinet's principle. This paper examines the effects of metal width and arm spacing on printed spiral's input impedance. A model is proposed based on examination by decomposition of planar spiral. A closed-form expression for the input impedance of Archimedean spiral antenna is obtained by evaluating the proposed model with conformal mapping techniques. Full-wave numerical simulations, Babinet's principle, and a fabricated antenna demonstrate the accuracy of the proposed model. The expression in this work can be used to find the impedance of a variety of spiral complementary structures analytically. The examination and discussion on the effects of other parameters and features in addition to the spiral itself are also provided through numerical simulation.

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Extremely Low-Profile, Single-Arm, Wideband Spiral Antenna Radiating a Circularly Polarized Wave

Cited by 52 publications

References 15 publications

A Compact Dual-Polarized Broadband Antenna With Hybrid Beam-Forming Capabilities

A Compact Dual-Polarized Broadband Antenna With Hybrid Beam-Forming Capabilities

Single-Feed Composite Cavity-Backed Four-Arm Curl Antenna

Travelling Wave Mechanism and Novel Analysis of the Planar Archimedean Spiral Antenna in Free Space

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