Compact Dual-Polarized Filtenna With Steep Roll-Off Rate for Base Stations

Wang, Ji Wen; Sun, Shuai; Ma, Ruyu; Zhang, Xiu Yin

doi:10.1109/lawp.2022.3177937

Cited by 9 publications

(2 citation statements)

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“…Secondly, as compared to the differential-fed dualpolarized filtering antennas [15]- [21], the proposed antenna shows comparable operational-bandwidth and isolation, but achieves a higher gain and higher out-of-band suppression.…”

Section: Discussionmentioning

confidence: 99%

“…Accordingly, dual-polarized filtering antennas [2]- [14] have received much attention in recent years. Furthermore, in order to directly connect to differential RF/microwave circuits without additional balun, differential-feed scheme has applied to the dual-polarized filtering antennas [15]- [21]. Interestingly, with perfectly symmetrical structure, these antennas yield a theoretical infinite isolation and zero crosspolarization level.…”

Section: Introductionmentioning

confidence: 99%

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Differential-Fed Dual-Polarized Filtering Fabry-Perot Antenna With High Isolation

Le-Huu

Kiem

et al. 2022

IEEE Access

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In this paper, a dual-polarized filtering Fabry-Perot antenna (FPA) with high-isolation is proposed. It consists of a feed element of differential-fed dual-polarized square patch and a partially reflecting surface (PRS). The patch is capacitively coupled with T-shaped resonators and shorting-vias to obtain broadband characteristic and radiation nulls. The PRS structure is composed of two complementary metasurface layers are selected for achieving a positive reflection phase gradient within the broad frequency range. More interestingly, thanks to the frequency selectivity feature, the PRS significantly enhances the filtering characteristic of the FPA. For verification, a prototype of the proposed antenna operating at the 5.5-GHz center frequency has been fabricated and measured. The prototype with an overall size of ∼2.0λ min × 2.0λ min × 0.49λ min (λ min is the free-space wavelength referring to the lowest operational frequency) result in an impedance bandwidth of 17.1% (5.02 − 5.96 GHz) for 10-dB return loss and a high isolation of ≥ 45 dB. Moreover, the far-field measurements result in a good dual-polarized radiation with the peak gain of 13.0 dBi, cross-polarization level of ≤ -25 dB within the passband, and out-of-band suppression level of ≥ 20 dB.

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Section: Discussionmentioning

confidence: 99%