Highly isolated crossed dipole antenna with matched copolar beams

Mirmozafari, Mirhamed; Saeidi-Manesh, Hadi; Zhang, G.

doi:10.1049/el.2018.0519

Cited by 9 publications

(4 citation statements)

References 8 publications

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“…4a, two radiation elements have similar dipoles, parallel lines, and half-wavelength baluns. The crossed dipole is center-excited as opposed to patch antenna having an offset excitation [16], [17]. As a result, we obtained an enhanced match between copolar patterns of the crossed dipole, which gets better as the radius of the cylinder increases.…”

Section: Proposed Crossed Dipole and Its Cylindricalmentioning

confidence: 85%

“…The proposed dipole stands a quarter wavelength above the ground plane, eliminating the need for a grounded continuous substrate. This way, we substantially suppress the higher-order modes of the surface wave [12], [16], which is reflected in the reduced ripples of the crossed dipole coplar patterns, as shown in Fig. 2d.…”

Section: Proposed Crossed Dipole and Its Cylindricalmentioning

confidence: 99%

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Design of a Cylindrical Crossed Dipole Phased Array Antenna for Weather Surveillance Radars

Golbon-Haghighi

Mirmozafari

Saeidi-Manesh

et al. 2021

IEEE Open J. Antennas Propag.

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We present a cylindrical dual-polarization phased array antenna for weather surveillance radars that features high isolation, matched copolar beams, low sidelobe levels, and adaptive null steering. We present a crossed dipole antenna element to replace the patch antenna on the currently deployed cylindrical polarimetric phased array radar (CPPAR). The crossed dipole element offers suppressed surface wave and lower coupling between adjacent elements of an array. As a result, we achieved lower backlobe and sidelobe levels, and a higher match between copolar beams of CPPAR compared to the currently deployed multi-layer patch antenna. Further reduction of the sidelobe level and adaptive null steering are obtained using a modified particle swarm optimization. The proposed null steering mitigates the interference among the four concurrent beams of a cylindrical phased array radar. The improvement in CPPAR radiation characteristics has been verified by comparing the presented crossed dipole antenna's radiation patterns and the existing aperture coupled patch antenna. The proposed crossed dipole phased array can benefit national weather radar networks to provide accurate multiparameter measurements enabling reliable observation of severe weather phenomena.

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Section: Proposed Crossed Dipole and Its Cylindricalmentioning

confidence: 85%

Section: Proposed Crossed Dipole and Its Cylindricalmentioning

confidence: 99%

Design of a Cylindrical Crossed Dipole Phased Array Antenna for Weather Surveillance Radars

Golbon-Haghighi

Mirmozafari

Saeidi-Manesh

et al. 2021

IEEE Open J. Antennas Propag.

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show abstract

“…These feeding and isolation issues have been the object of broad research activities (see, e.g., [10]- [12] and refs. therein).…”

Section: Introductionmentioning

confidence: 99%

Dual-Polarized Aperture-Coupled Patch Antennas With Application to Retrodirective and Monopulse Arrays

et al. 2020

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An isolation technique, which does not require conventional circulators, is proposed for the realization of a simple and low-cost aperture-coupled circularly polarized antenna for application to fullduplex devices. The approach is based on the use of slotlines loops to provide surface current cancellation in specific regions of the antenna structure, leading to improved axial ratio and isolation between the ports in excess of 50 dB. Circular polarization is achieved by introducing a double-box hybrid coupler, which is optimized to obtain good matching and isolation of the quadrature signals. On this basis, both right-and lefthand circularly polarized beams are achieved by interchanging the transmitting and receiving antenna ports, enabling full-duplex operation and reconfigurability. While the antenna structure is designed for 2.45 GHz operation, one can take advantage of the proposed approach to tune the frequency of maximum isolation. Both single-element prototypes as well as a 2×2 array are fabricated and measured, showing good agreement with the simulations and validating the proposed isolation approach. The beam steering capabilities as well as the application to a Van Atta retrodirective antenna array and the possibilities of achieving delta and sum patterns for monopulse operation are also reported. The proposed full-duplex antenna can also represent an excellent solution for narrowband wireless power transmission systems.

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“…There are numerous configurations for realising dual-polarisation capability: a microstrip patch antenna is one of them, and it is a costeffective solution [5,6]. However, a high-performance dual-polarised microstrip patch antenna with high polarisation purity that can meet the MPAR requirements needs to be simple and symmetric in terms of geometry.…”

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confidence: 99%

Dual‐polarised hybrid feed microstrip patch antenna for multifunction application

Saeidi-Manesh

Zhang

2019

Electron. lett.

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In this Letter, a dual-polarised aperture-coupled microstrip patch antenna with low cross-polarisation and high isolation is presented. A microstrip patch antenna is designed and fabricated to meet the multifunction phased array radar requirements. The proposed single element is fabricated and the measurement results along with simulation results have been presented, showing the performance of the designed single element. An input isolation of better than 50 dB and a cross-polarisation level of <−30 dB are achieved in the measurements.

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Highly isolated crossed dipole antenna with matched copolar beams

Cited by 9 publications

References 8 publications

Design of a Cylindrical Crossed Dipole Phased Array Antenna for Weather Surveillance Radars

Design of a Cylindrical Crossed Dipole Phased Array Antenna for Weather Surveillance Radars

Dual-Polarized Aperture-Coupled Patch Antennas With Application to Retrodirective and Monopulse Arrays

Dual‐polarised hybrid feed microstrip patch antenna for multifunction application

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