A Wideband Differentially Driven Dual-Polarized Antenna by Using Integrated Six-Port Power Divider

et al. 2022

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A dual-polarized filtering antenna with steep cut-off and compact size is developed for base station applications. In this design, four controllable radiation nulls are obtained by utilizing split rings, slotted Tshaped branches, a single-stub tuner, and a parasitic loop. Split rings are firstly used as the dipole arms to obtain the 1 st radiation null at upper outof-band. Four T-shaped branches working as DGS are printed under the crossed dipoles to achieve the 2 nd radiation null. The connected outer conductors of the differential feed structure acting as a single-stub tuner can provide the 3 rd radiation null to further enhance the upper-band rejection. Finally, a parasitic loop is incorporated around the split rings, and the outof-band rejection of the lower-band is further enhanced by the 4 th radiation null. More importantly, the impedance bandwidth of the antenna can be expended with two newly introduced resonant modes. As a result, a compact filtering antenna with a wide operational bandwidth of 1.7-3.01 GHz (56%) is realized for |Sdd11| < -15 dB with the isolation higher than 38 dB. The outof-band suppression is higher than 18.4 dB in 3.1-4.5 GHz and more than 47 dB in 0.8-1.1 GHz.

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Compact Dual-Polarized Filtering Antenna With Steep Cut-Off for Base-Station Applications

Liu

et al. 2022

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“…Because of the advantages of low noise level, high harmonic rejection, and high mode current suppression, differential electronic components and devices are widely applied in wireless communication systems [17]. Therefore, to directly match these differential components and devices, differentially fed antennas are widely researched [18]- [22]. In this work, a wideband power divider composed of three-strip transmission lines (TS-TLs) is first proposed and illustrated.…”

Section: Introductionmentioning

confidence: 99%

“…Detailed analysis shows that the TS-TL based power divider can have wide impedance bandwidth with two reflection zeros under the differential excitation. Compared to the parallel-line based power divider presented in our previous work in [22], the TS-TL based power divider has the unique structures and impedance characteristics with the different equivalent circuits.…”

Section: Introductionmentioning

confidence: 99%

Wideband Differentially Fed Dual-Polarized Antenna by Using Three-Strip Transmission Lines

Wen

Luo

et al. 2021

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“…In this article, we introduce a novel dual-polarized 2-D multibeam antenna array incorporating differential-fed antenna elements. The differential feeding technique has been widely used in modern antenna designs [25], [26] in order to achieve high port isolation, high XPD, and symmetric radiation patterns. In our design, the antenna element is composed of an SIW cavity with four shorted patches placed inside, and it is differentially excited for dual-polarization by a pair of feeding strips and transverse slots beneath the patches.…”

mentioning

confidence: 99%

Millimeter-Wave Dual-Polarized Differentially Fed 2-D Multibeam Patch Antenna Array

Yang

Luo

et al. 2020

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In this article, a novel millimeter-wave dualpolarized 2-D multibeam antenna array incorporating differentially fed antenna elements is proposed to achieve high cross-polarization discrimination (XPD) when the beams scan to the maximal pointing angles. The antenna element is composed of an SIW cavity with four shorted patches placed inside, and it is differentially excited for dual-polarization by a pair of feeding strips and transverse slots beneath the patches. Differential excitation is realized by a power divider designed on two laminate layers. Two Butler matrices placed perpendicularly with each other in different laminates are employed to generate four tilted beams with dual-polarization. A 2 × 2 dual-polarized 2-D multibeam antenna array working at 28 GHz is designed, fabricated, and measured. The operation bandwidth of the antenna is 26.8-29.2 GHz. The improvement in the XPD is experimentally demonstrated by far-field measurement. When the beams scan to 30 • off the boresight, the measured XPDs are 28 dB at the center frequency and higher than 25 dB over the operation bandwidth, which confirms that the cross-polarized radiation in the 2-D multibeam antenna array is suppressed by using the differential-feeding technique. The measured gain is in the range from 7.6 to 10.5 dBi.