A hybrid-fed dual-polarized stacked patch array antenna for Ku-band radar systems

Song, Lizhong; Nie, Yuming

doi:10.1109/aps.2015.7305343

Cited by 5 publications

(3 citation statements)

References 6 publications

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“…The majority of the documented DCP antennas are differentially fed; however, in this type, port isolation is major disadvantage, as the isolation of a simple DCP antenna does not go beyond 25 dB. Other complex differential feeds have been used to enhance the isolation, such as differential-driven antennas [20,21], the techniques of hybrid-fed [22] and particular shapes aperture-coupled [23]. However, the isolation level has never exceeded 40 dB [24,25].…”

Section: Geometry Of the Antenna Arraymentioning

confidence: 99%

Polarization Reconfigurable Sequentially Rotated Dielectric Resonator Antenna Array

Qasaymeh

2023

Preprint

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In this article, a miniaturized dielectric resonator antenna (DRA) array is presented in which the polarization can be altered between right-hand circular polarization (RHCP) and left-hand circular polarization (LHCP) operating in the IEEE 802.11a band. To enable circular polarization (CP), a novel resonating element is proposed that consists of a rectangular dielectric resonator (RDR) coupled to a hexagonal slot (HS) and fed by a microstrip line. The proposed resonating element that is composed of a hexagonal slot (HS) coupling a rectangular dielectric resonator (RDR) produces two orthogonal degenerate modes, 𝑇𝐸𝑥𝛿32 and 𝑇𝐸𝑦1𝛿1, thus ensuring the existence of CP radiation. To achieve dual circular polarization (DCP) performance, a 2 x 2 sequential rotation (SR) array is prototyped that employs a single rat-race coupler and two branch-line couplers. Polarization agility is attained by utilizing four PIN diodes that are positioned between the rat-race outputs and quadrature coupler inputs and are operated in alternating pairs. Prior to simulation and fabrication, an equivalent impedance circuit of the array is postulated based on the array sub-elements to provide a primary resonance attitude of the array. The 76 x 51 mm2 (1.469𝜆0 ×0.986𝜆0) array has an impedance bandwidth of 12.12 % for both polarization states, in conjunction with a 3-dB axial ratio (AR) impedance bandwidth of 11.76 %. The gain variation realized throughout the resonance band ranges from 9.62 to 9.8 dBi. The results for the proposed array indicate that it is suitable for applications operating in the IEEE 802.11a band.

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Section: Geometry Of the Antenna Arraymentioning

confidence: 99%

Polarization Reconfigurable Sequentially Rotated Dielectric Resonator Antenna Array

Qasaymeh

2023

Preprint

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“…Designing dual-polarised microstrip antenna arrays with increased port-to-port isolation is not a simple task, considering the fact that typical isolation of a simple dual-polarised microstrip antenna does not exceed 25 dB. Even if complex feeding methods such as a differential-driven antenna [8,9], hybrid-fed techniques [10] or aperture-coupled with specific slot shapes are taken in consideration, the maximum level of isolation will attain 40 dB [11,12]. For this reason, increasing the port-to-port isolation of microstrip antenna arrays could be achieved by applying dedicated feeding networks that utilise compensation of the crosstalk between the array ports by means of the pairwise anti-phased feeding technique where couples of radiators which are the image mirror one of another are fed by currents shifted by 180 • in the phase [13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

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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“…Therefore, a very small number of studies have been done on the subject of linear circularly polarized antenna arrays. One such array, but with only 4 elements, that is intended for applications in the Ku frequency band, is given in [9]. This paper presents the enhanced design of the circularly polarized series-fed antenna array consisting of 24 novel truncated patch antennas operating at 24 GHz given in [10], in order to obtain fully realistic characteristics in the very narrow operating range.…”

Section: Introductionmentioning

confidence: 99%

Improved model of the circularly polarized patch antenna array at 24 GHz for radar applications

Radnovic¹,

Jokanovic

Boryssenko³

2019

Telfor J

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The paper presents the improved design of the novel circularly polarized patch antenna array operating at ISM band 24.05-24.25 GHz. The antenna array consists of 24 identical truncated patches which are serially fed through the microstrip line. The antenna is a travelling-wave array with exponential power distribution which provides very good side lobe suppression of 30 dB in the entire operating band making it suitable for automotive radar applications. Simulated axial ratio is below 3dB in the range (24.06-24.26) GHz, the antenna gain is greater than 17.2 dBi, cross polarization is better than 15 dB and return loss is greater than 15 dB in the entire ISM band.Index Terms -Antenna array, circularly polarized patch antenna, exponential power distribution, axial ratio.

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A hybrid-fed dual-polarized stacked patch array antenna for Ku-band radar systems

Cited by 5 publications

References 6 publications

Polarization Reconfigurable Sequentially Rotated Dielectric Resonator Antenna Array

Polarization Reconfigurable Sequentially Rotated Dielectric Resonator Antenna Array

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

Improved model of the circularly polarized patch antenna array at 24 GHz for radar applications

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