A Dual-Polarized Linear Antenna Array With Improved Isolation Using a Slotline-Based 180° Hybrid for Full-Duplex Applications

Zhang, Yiming; Zhang, Shuai; Li, Jialin; Pedersen, Gert Frølund

doi:10.1109/lawp.2019.2890983

Cited by 49 publications

(26 citation statements)

References 20 publications

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“…This seems to be the effect of couplings between array elements. In [25], isolation of 50 dB is obtained in a narrow frequency band thanks to the use of a directional coupler separating networks for both polarisations, despite the use of FN that do not improve the isolation. In the proposed antenna array, the isolation is 7-32 dB better than the competitor arrays thanks to the use of a carefully chosen and optimised feeding network.…”

Section: Experimental Verificationmentioning

confidence: 99%

“…In such a case, even after the optimisation process, it is difficult to obtain isolation better than 50 dB [13,14,24]. The achievement of higher isolation requires the use of multilayer PCBs in which radiators and FN are separated by means of ground planes [9,[25][26][27]. Another important aspect of the dual-polarised antennas that affects isolation is the operational frequency band.…”

Section: Introductionmentioning

confidence: 99%

“…In the literature, little attention is paid to linear antenna arrays which, due to their wide radiation pattern in the horizontal plane, could be used as base station antennas. Antenna arrays proposed by other authors do not offer sufficient isolation [15,23,[31][32][33], or, despite satisfactory isolation, offer an operational frequency band that is too narrow [25]. This paper describes the design process of the dual-polarisation linear antenna arrays using a four-element antenna array for U-NII 5.15-5.925 GHz frequency band as an example.…”

Section: Introductionmentioning

confidence: 99%

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On the Design of Dual-Polarised Linear Antenna Arrays with Enhanced Port-to-Port Isolation

Wójcik

Surma

Нога

et al. 2020

Sensors

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The paper describes the process of designing a dual-polarised linear antenna array with enhanced port-to-port isolation, with the example of a four-element array with isolation better than 60 dB for the U-NII 5.15–5.925 GHz band. As a single antenna, dual-polarised electromagnetically coupled microstrip antennas were used with port-to-port isolation not exceeding 25 dB. A significant improvement in the isolation of the array was achieved thanks to the application of a dedicated feeding network. On the basis of theoretical analysis, a mathematical model describing port-to-port isolation was developed. Circuit and full-wave simulations were carried out to show the influence of electromagnetic couplings between antennas and/or the microstrip lines of the feeding network and the selection of phase shifters/power dividers on the isolation. The fabricated prototype is characterised by a gain of about 14 dBi, polarisation purity of at least −27 dB within the main lobe and close to expectations isolation better than 57 dB within the whole operational band.

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Section: Experimental Verificationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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On the Design of Dual-Polarised Linear Antenna Arrays with Enhanced Port-to-Port Isolation

Wójcik

Surma

Нога

et al. 2020

Sensors

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“…However, previous designs [19], [20] which have implemented this technique have offered narrow isolation bandwidths. On the other hand, the antenna presented in [21], which operated at 5…”

Section: Introductionmentioning

confidence: 99%

Dual-Polarized High-Isolation Antenna Design and Beam Steering Array Enabling Full-Duplex Communications for Operation Over a Wide Frequency Range

Kuznetcov

Podilchak

McDermott

et al. 2021

IEEE Open J. Antennas Propag.

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A new four-port dual-polarized antenna and array are presented for In-Band Full-Duplex (IBFD) applications, offering high inter-port isolation. The single-element antenna system consists of four H-shape slots, stacked patches for wide bandwidth, and two external hybrid couplers. The multilayer antenna is well matched from about 2.1 to 2.4 GHz and provides high isolation in this frequency range in excess of 60 dB. Two different prototypes are simulated and measured to highlight the design process. In addition, a new and compact hybrid coupler with excellent phase and magnitude stability is also presented for improved antenna radiation and IBFD performances. When compared to other similar types of hybrid coupler and antenna systems, the proposed configurations are simple to manufacture, provide a higher isolation bandwidth (10%), and higher gain of 7.3 dBi with cross-polarization levels of 30 dB or lower. The single-element design was also extended to a 2×2 array and studied for different beam steering and feeding scenarios. The operating bandwidths and isolation values offered by these S-band antenna and array systems can support new data link possibilities for beam steering and future low-cost IBFD wireless networks by simple antenna fabrication.

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“…The rapid development in telecommunication systems and applications demands compact, low profile and miniaturized microwave components for application to such as satellite systems, mobile communications, wireless remote sensing, super resolution transmissions and imaging [1], and so on. In all the above mentioned applications, microwave components such as diplexers [2], [3], antennas [4]- [6], baluns [7], [8], power dividers [9]- [12] and filters [13], [14] may be used in one way or the other. Among them, the microwave filters are indispensable in many RF and microwave applications and they may function as separating or combining signals of different frequencies as a result of the electromagnetic spectrum being a limited resource that needs to be shared.…”

Section: Introductionmentioning

confidence: 99%

A rectangular slot Yagi DGS microstrip filter with sharp rolloff and wide suppression band

Gong

2020

Journal of Electrical Engineering

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A compact microwave lowpass filter based on defected ground structure (DGS), consisting of Yagi slot DGS resonators etched on the metallic ground plane of a microstrip line, is studied in this paper. The proposed lowpass filter was analyzed by parameter sweeping and optimal parameters were selected to design a prototype demonstrator filter. Measurements show the developed lowpass filter exhibits a 3dB cuto frequency of 3.07 GHz with a sharp transition between the passband and the stopband, low insertion loss of less than 0.6 dB in the passband and an in-band group delay of 0.4 ns. Moreover, an ultra-wide suppression band from 3.68 to over 20 GHz with a suppression level generally better than 20 dB is also observed from measurements.

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A Dual-Polarized Linear Antenna Array With Improved Isolation Using a Slotline-Based 180° Hybrid for Full-Duplex Applications

Cited by 49 publications

References 20 publications

On the Design of Dual-Polarised Linear Antenna Arrays with Enhanced Port-to-Port Isolation

On the Design of Dual-Polarised Linear Antenna Arrays with Enhanced Port-to-Port Isolation

Dual-Polarized High-Isolation Antenna Design and Beam Steering Array Enabling Full-Duplex Communications for Operation Over a Wide Frequency Range

A rectangular slot Yagi DGS microstrip filter with sharp rolloff and wide suppression band

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