Wideband Dual-Polarized and Dual-Monopulse Compact Array for SAR System Integration Applications

Huang, Guan‐Long; Zhou, Song; Chio, Tan‐Huat; Sim, Chow‐Yen‐Desmond; Yeo, Tat‐Soon

doi:10.1109/lgrs.2016.2576474

Cited by 31 publications

(3 citation statements)

References 12 publications

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“…Through a digital beam-forming technique, the radar could receive the return of the target in any polarisation form. Compared with the dual-polarisation form [21,22], variable polarisation only utilises half the number of channels and reduces the complexity of the system.…”

Section: Introductionmentioning

confidence: 99%

Digital beam forming methods for variable polarimetric monopulse radar

Zhang

Pei

et al. 2021

IET Radar Sonar & Navi

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In variable polarimetric monopulse radars, due to the number and types of data channels, the polarisation and angle information of the target in the receiving signals are nonlinearly coupled, which results in incorrect polarisation measurement and erroneous angle estimation through a linear digital beam forming (DBF) method. Based on a variable polarimetric monopulse radar with four channels, two non-linear DBF methods are proposed to improve radar ability. Through the angle monopulse estimation principle and the reciprocity theorem, new pairs of summation and difference signals in all polarisation channels are formed to generate the correct polarimetric scattering and angle estimation results. The simulation and experiment results show that the proposed methods achieve a higher precision of polarisation measurement and more consistent angle estimation results compared to the linear DBF method.This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Section: Introductionmentioning

confidence: 99%

Digital beam forming methods for variable polarimetric monopulse radar

Zhang

Pei

et al. 2021

IET Radar Sonar & Navi

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“…This means that the elements will experience spatial distribution and to ensure optimal performance, the phases and magnitudes at every element must be tuned accordingly [17]. While the rectangular waveguide is of corporate feed for wideband purposes [18][19][20]. Moreover, in order to reduce the long line effect from the series feed and extricate it from space limitation due to the radiating element with a T-junction waveguide power divider to form a complete feed network [21].…”

Section: Introductionmentioning

confidence: 99%

Microstrip Array Antenna using Series-Corporate Feed for Navigation System

Khalifa

Ramli

Sahar

2020

IJEEI

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In this paper, the proposed antenna consists of a single transmission line for 6-elements microstrip array antenna using Rogers RT5880 substrate material with a dielectric constant (ε r ) of 2.2 and thickness of 0.787 mm for navigation applications. The array structures of unequal patches placement are proposed with corporate feed line and H-shaped configurations are employed on the substrate and used the microstrip feed line with a corporate feed network excited via 50 Ω with T-junction method to control the feed for each group. 6elements microstrip array antenna has operated at the resonant frequency of 1.27 GHz was obtained between the frequency from 1.2663 GHz to 1.2734 GHz where the S11-parameters of the structure designed and simulation below than <-10 dB. The analysis shows the antenna gain has increased 72.6% with high directivity as compared to single elements microstrip antenna. The radiation characteristics and other array parameters are evaluated with respect to the application requirements. However, circular polarization has obtained in 6-elements array antenna as the axial ratio is successfully achieved below than -3dB. The antenna efficiency, the current distribution, VSWR, and S11-parameters of the proposed 6-elements CP microstrip array antenna have been presented and discussed in detail. The design methodology and the measurement results have been presented and discussed in this paper.

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“…The low cost and small size of the antenna render it for easy integration into various equipment. UWB antennas are used for short range high bandwidth communications like indoor wireless networks, sensor networks, automatic target recognition, RF industrial, SAR system integration and near-field biomedical applications such as microwave imaging for breast cancer detection, to name a few [2][3][4]. The UWB antenna has to provide wide impedance bandwidth and omnidirectional radiation pattern over the entire band.…”

Section: Introductionmentioning

confidence: 99%

A Stopband Control Technique for Conversion of CPW-Fed Wideband Antennas to Uwb

Cherian¹,

Mythili²

2017

PIER Letters

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Abstract-A technique for converting a wide-band coplanar waveguide fed antenna to UWB by positioning slots in the modified ground plane (MGP) adjacent to the feed is proposed in this paper. The slots can be symmetrically or asymmetrically positioned for optimum performance. One slot pair is initially positioned through parametric analysis in the modified ground plane at an equal distance from the feed end for the maximum achievable impedance bandwidth. The second slot pair is similarly positioned, optimising the antenna for ultra wideband operation. Two CPW-fed antenna geometries are experimented using the technique, one unique and the other, a generic circular monopole. Both antennas have MGP and are fabricated on an FR4 substrate. The analysis and simulation have been done in FEM based High Frequency Structure Simulator (HFSS). The performance of the two antennas is measured with a Vector Network Analyzer 'Agilent PNAE8362B'. The impedance bandwidth and radiation pattern validate the performance of the antennas for ultra wideband applications. The experimentally obtained bandwidth precisely covers UWB, and principal patterns are uniform throughout the band.

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Wideband Dual-Polarized and Dual-Monopulse Compact Array for SAR System Integration Applications

Cited by 31 publications

References 12 publications

Digital beam forming methods for variable polarimetric monopulse radar

Digital beam forming methods for variable polarimetric monopulse radar

Microstrip Array Antenna using Series-Corporate Feed for Navigation System

A Stopband Control Technique for Conversion of CPW-Fed Wideband Antennas to Uwb

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