Modified S-Band Satellite Antenna With Isoflux Pattern and Circularly Polarized Wide Beamwidth

Choi, Eun-Cheol; Lee, Jae Woo; Lee, Taek-Kyung

doi:10.1109/lawp.2013.2285231

Cited by 64 publications

(33 citation statements)

References 7 publications

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“…In [5], by using a feed network consisting of four broadband baluns and an impedance matching circuit, a broadband CP antenna is proposed, which achieves a 3-dB AR bandwidth about 41%. In recent years, owing to superior circular polarization performance, crossed dipole antennas [6][7][8][9][10][11] have received extensive attention. In [6], a CP antenna with wide AR beamwidth is presented, which has a 3-dB AR bandwidth of 33%.…”

Section: Introductionmentioning

confidence: 99%

“…In its CP passband, the 3-dB AR beamwidth is about 140 • . Moreover, a modified satellite antenna with isoflux pattern using a crossed dipole is reported in [9], which achieves a 3-dB AR beamwidth about 180 • . In [10], by introducing a wideband divider as a feed network, a crossed bent dipole realizes a 2-dB AR bandwidth of 76.3% and a 3-dB beamwidth of greater than 88 • .…”

Section: Introductionmentioning

confidence: 99%

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A Broadband Crossed Dipole Antenna With Wide Axial Ratio Beamwidth for Satellite Communications

Feng¹,

Zhang²,

Sun³

2018

PIER Letters

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Abstract-This letter presents a broadband circularly polarized (CP) crossed dipole antenna with wide axial ratio (AR) beamwidth. The antenna consists of a crossed dipole fed by two baluns, a wideband feed network and a cylindrical metallic cavity. To broaden the beamwidth, circular arms are introduced. Meanwhile, the metallic cavity is utilized to broaden the AR beamwidth. Measurements show that the antenna has an impedance bandwidth of 70.6% (1.87-3.91 GHz) for voltage standing wave ratio (VSWR) ≤ 2 and a 3-dB AR bandwidth of 62.4% (1.92-3.66 GHz). In addition, the 3-dB AR beamwidth of the antenna is larger than 100 • , and the gain varies from 4 dBic to 6 dBic over the whole CP operation bandwidth. Owing to the high-gain and wideband operation, the proposed CP antenna is potentially capable for satellite applications and high-gain applications.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Broadband Crossed Dipole Antenna With Wide Axial Ratio Beamwidth for Satellite Communications

Feng¹,

Zhang²,

Sun³

2018

PIER Letters

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“…However, gains in [9][10][11][12][13][14] at 5 • elevation angle are all less than −3 dBic. In order to improve the gain at low elevation angle, some techniques have been put forward in [1,[15][16][17]. Parasitic ring at the top of traditional microstrip CP antenna is used in [1], and its average gain for 5 • elevation angle is about −1.8 dBic.…”

Section: Introductionmentioning

confidence: 99%

“…Parasitic ring at the top of traditional microstrip CP antenna is used in [1], and its average gain for 5 • elevation angle is about −1.8 dBic. The antennas using vertically loaded elements [15] and a dual-ring cavity [16] are proposed. Their average gains at 5 • elevation angle are more than −1 dBic, and the 3 dB AR beamwidth is 180 • and 130 • , respectively.…”

Section: Introductionmentioning

confidence: 99%

Compact Wide-Beam Circularly Polarized Antenna With Stepped Arc-Shaped Arms for CNSS Application

Wang¹,

Zhang²,

Fan³

et al. 2017

PIER C

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Abstract-A single-feed circularly polarized wide-beam antenna is proposed for Compass Navigation Satellite System (CNSS) application. The antenna consists of four stepped arc-shaped arms, which are applied to generate circularly polarized radiation. To broaden the beamwidth, each arm is split up into two horizontal arc-shaped parts and one vertical part. The proposed antenna is simulated, fabricated and tested. The measured results show that the 10-dB return loss band of the proposed antenna is from 2.37 GHz to 2.65 GHz and the 3-dB axial ratio band from 2.42 GHz to 2.55 GHz, covering the receiving band (2.49175 GHz ± 4.08 MHz) of CNSS. Its 3-dB AR beamwidth is 181 • at 2.491 GHz. For the horizontal radiation pattern of the proposed antenna at 5 • elevation angle, the RHCP gain is greater than −1.1 dBic, and the out-of-roundness is 1 dB. Additionally, the proposed antenna has a size of 0.37λ 0 × 0.37λ 0 × 0.11λ 0 with respect to 2.491 GHz.

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“…Researchers have suggested several candidates for TT&C satellite antennas, including the microstrip patch [2], quadrifilar helix [3], conical spiral [4], and turnstile antenna [5][6][7][8]. The turnstile antenna, in particular, has several advantages, such as low complexity, easy fabrication, and robust characteristics with wide beamwidth.…”

Section: Introductionmentioning

confidence: 99%

Equivalent Model Analysis of Modified Satellite Antenna for Isoflux Pattern Generation

Choi¹,

Lee

Lee³

et al. 2014

Journal of electromagnetic engineering and science

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This paper presents a theoretical approach for a modified turnstile antenna suitable for satellite communication in order to investigate the current distributions of radiators and radiation characteristics with equivalent model analysis. The proposed equivalent model is composed of an ideally horizontal dipole antenna and vertically loaded top-hat radiating elements. The required isoflux pattern with wide beamwidth has been achieved by attaching top-hat elements to the main radiators. In addition to illustrating radiation patterns, electrical performances like current distributions have been analyzed by mathematically manipulating the equations derived from the equivalent horizontal and vertical dipole model. Key Words: Circular Polarization (CP), Dipole Antenna, Equivalent Model, Isoflux Pattern, Turnstile Antenna. Manuscript received May 6, 2014 ; Revised August 11, 2014 ; Accepted August 12, 2014. (ID No. 20140506-020J) School of Electronics, Telecommunication and Computer Engineering, Korea Aerospace University, Goyang, Korea. *Corresponding Author: Jae Wook Lee (e-mail: jwlee1@kau.ac.kr) 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. generate a radiation pattern in a direction close to the ground plane. As a candidate receiving antenna working for a TT&C satellite, it covers the frequency range from 2,025 to 2,125 MHz in the satellite communication system. The important aspects for the proposed antenna are the enhancement of the axial ratio beamwidth affected by the vertically installed top-hat elements and beamwidth expansion of the isoflux pattern. Equivalent Model of Top-Hat Loaded AntennaFor the mathematical evaluations of E-field distributions and to simplify the understanding of the radiation mechanism of the proposed antenna, the bowtie-shaped dipole elements is defined and modeled as simplified crossed dipole elements. Fig. 2 shows the equivalent model of the proposed and modified turnstile dipole radiating elements by assuming the infinite ground plane of σ = ∞ and finite height of h1. The entire structure of the radiators consists of the horizontal dipole and vertically loaded tophat elements. The parameters l1 and l2 mean the lengths of horizontal dipole and vertical top-hat elements, respectively. In addition, θ and  are the angles from z-axis and y-axis to the observation point r, respectively.The current distributions on the real source dipole elements can be approximated for the evaluation of the far-field radiation patterns as following equations [9].0 I and k mean the maximum current value and the wavenumber, respectively. Fig. 3 shows the surface current distributions on the bowtie-shaped dipole with top-hat elements and ideal dipole with vertical elements using the commercially available software CST MWS based on the fin...

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Modified S-Band Satellite Antenna With Isoflux Pattern and Circularly Polarized Wide Beamwidth

Cited by 64 publications

References 7 publications

A Broadband Crossed Dipole Antenna With Wide Axial Ratio Beamwidth for Satellite Communications

A Broadband Crossed Dipole Antenna With Wide Axial Ratio Beamwidth for Satellite Communications

Compact Wide-Beam Circularly Polarized Antenna With Stepped Arc-Shaped Arms for CNSS Application

Equivalent Model Analysis of Modified Satellite Antenna for Isoflux Pattern Generation

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