Sidelobe reduction of a parabolic reflector with auxiliary reflectors

Lam, P.; Lee, Shung-Wu; Lang, K.; Chang, Dau‐Chyrh

doi:10.1109/tap.1987.1144056

Cited by 9 publications

(7 citation statements)

References 3 publications

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“…For satellite communication, anti‐interference of satellite earth station is discussed as early as 1975 10 . In the early time, auxiliary reflectors are added on the reflector antenna to reduce the sidelobe 11 . And later most of the research are mainly focused on the improvement of anti‐interference algorithm 12 and hardware design, 13 as well as communication mode 14,15 .…”

Section: Introductionmentioning

confidence: 99%

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Auxiliary antenna design for anti‐interference of satellite communication earth station

Meng

Luo

et al. 2022

Micro & Optical Tech Letters

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In this study, a novel elliptical widebeam auxiliary antenna is proposed for anti‐interference of satellite communication earth station. The wide beam width of about 180° in horizontal plane (H‐plane) is achieved by increasing the width of the substrate, reducing the size of the ground plane and adding a V‐shaped aluminum frame. And the narrow beam width of about 30° in elevational plane (E‐plane) is achieved by designing a binary element array. Only two auxiliary antennas are needed for sampling to cover interference from any azimuth direction in H‐plane. The antenna is fabricated and measured, and the results are in good agreement with simulation. The corresponding −10 dB impedance bandwidth is about 17% with maximum gain of 6.5 dBi. The 3 dB beam widths are respectively 33° and 178° in E‐plane and H‐plane. Furthermore, simulation and experiment of the proposed auxiliary antenna in interference cancelation system verify its anti‐interference performance. According to sidelobe canceler, an average interference cancelation ratio of about 27 dB is achieved.

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Section: Introductionmentioning

confidence: 99%

“…10 In the early time, auxiliary reflectors are added on the reflector antenna to reduce the sidelobe. 11 And later most of the research are mainly focused on the improvement of anti-interference algorithm 12 and hardware design, 13 as well as communication mode. 14,15 There are few studies about auxiliary antennas in interference cancelation.…”

mentioning

confidence: 99%

Auxiliary antenna design for anti‐interference of satellite communication earth station

Meng

Luo

et al. 2022

Micro & Optical Tech Letters

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“…In these environments, for example, streets, highways, tunnels, and corridors, a unidirectional or bidirectional antenna performs better than an omnidirectional antenna [5][6][7][8][9][10][11]. To generate a unidirectional beam, a planar reflector [12,13], corner reflector [14,15], parabolic reflector [16], or conical reflector [17] was used with an omnidirectional monopole antenna. The unidirectional bandwidth is narrow and could be enhanced by replacing the linear monopole with a surface monopole, for example, circular, triangular, square, or rectangular monopole [18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Rectangular Ring Antenna Excited by Circular Disc Monopole for WiMAX System

Vongsack

Phongcharoenpanich

Kosulvit

et al. 2014

International Journal of Antennas and Propagation

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This research presents a rectangular ring antenna excited by a circular disc monopole (CDM) mounted in front of a square reflector. The proposed antenna is designed to cover a frequency range of 2.300–5.825 GHz and thereby is suitable for WiMAX applications. Multiple parametric studies were carried out using the CST Microwave Studio simulation program. A prototype antenna was fabricated and experimented. The measurements were taken and compared with the simulation results, which indicates good agreement between both results. The prototype antenna produces an impedance bandwidth (|S11|< −10 dB) that covers the WiMAX frequency range and a constant unidirectional radiation pattern (θ=0°and∅=90°). The minimum and maximum gains are 3.7 and 8.7 dBi, respectively. The proposed antenna is of compact size and has good unidirectional radiation performance. Thus, it is very suitable for a multitude of WiMAX applications.

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“…However, for some specific application that requires the long-range service area such as point-to-point communication between the buildings, when the mobiles move along the confined paths such as street, highways, tunnels, and corridors, for these environments, a unidirectional or bidirectional antennas are more suitable than the omnidirectional one to serve these demands [3][4][5][6]. The omnidirectional monopole antenna is modified by adding different shapes of reflectors such as planar reflector [7], corner reflectors [8,9], curved reflectors [10], ring reflectors [11], and others to obtain the unidirectional or bidirectional beams. To enhance the bandwidth, the linear monopole is extended to surface monopole [12] or three-dimensional (3D) monopole [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

A UWB Bidirectional Rectangular Ring Antenna Fed by CDM with a Rod and Ridges for Constant Beam Direction

Vongsack

Lamultree

Osklang

et al. 2012

International Journal of Microwave Science and Technology

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This paper presents an ultra-wideband (UWB) rectangular ring antenna excited by a circular disc monopole (CDM) with a conducting rod and two double ridges to radiate bidirectional pattern with constant beam direction along the entire UWB frequency range of 3.1-10.6 GHz. The conducting rod and double ridges at the upper wall of the ring are added to solve the tilted beam problem at the higher edge frequency whereas the double ridges at the lower wall are used to enhance the impedance bandwidth. The dimensions of the rectangular ring and the CDM are initially considered to achieve the bidirectional pattern with the suitable resonant frequencies and bandwidth. Then, the parameters of copper rod and two double ridges are determined by parametric study using CST Microwave Studio simulation software. The prototype antenna was fabricated, and the measured results show good agreement with the simulated ones. The obtained bandwidth of |S 11 | < −10 dB can cover the UWB frequency range as well as the bidirectional beam radiation with constant beam direction (θ = 0 • , 180 • and φ = 90 • ). The minimum and maximum measured gains are 3.1 dBi to 5.3 dBi, respectively. The proposed antenna possesses compact size with good radiation performance that can be a promising candidate for UWB applications.

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Sidelobe reduction of a parabolic reflector with auxiliary reflectors

Cited by 9 publications

References 3 publications

Auxiliary antenna design for anti‐interference of satellite communication earth station

Auxiliary antenna design for anti‐interference of satellite communication earth station

Rectangular Ring Antenna Excited by Circular Disc Monopole for WiMAX System

A UWB Bidirectional Rectangular Ring Antenna Fed by CDM with a Rod and Ridges for Constant Beam Direction

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