A Dual Band Full-Duplex Monopole Antenna for WLAN Application

Kumari, K. Nalini; Jaiswal, Rahul Kumar; Srivastava, Kumar Vaibhav

doi:10.1109/incap47789.2019.9134496

Cited by 2 publications

(3 citation statements)

References 9 publications

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“…However, they suffer from limited bandwidth of less than 20%. Another conventional technique is a 180° hybrid 13,18,24–25 . It is worth mentioning that a slot‐line based on the 180° hybrid is used to provide a bandwidth of 21.7% and high isolation of 50 dB 13 .…”

Section: Introductionmentioning

confidence: 99%

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Wideband dual‐polarized antenna with high isolation for full‐duplex application

Zhu

Yang

et al. 2022

Micro & Optical Tech Letters

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A wideband dual-polarized antenna with high isolation is proposed for full-duplex applications. It consists of a radiating patch, two E-shaped strips, a parasitic patch, a metal reflector, and a 180°power divider. Two hook-shaped strips and a pair of E-shaped strips are used to excite the radiating patch realize ±45°polarization. The impedance matching is significantly enhanced by the attendance of the parasitic patch and 180°power divider. Multiple decoupling techniques, including polarization diversity, radiation mechanism diversity, shunt effect of a shorting pin, and differential feeding, are simultaneously used to achieve high isolation. An antenna prototype is measured with an impedance bandwidth of 52.2% (1.7-2.9 GHz) for |S 11 |, |S 22 | < −10 dB, and high isolation of better than 55 dB. These characteristics make it a promising candidate for in-band full-duplex wireless communication systems.

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Section: Introductionmentioning

confidence: 99%

“…Another conventional technique is a 180°hybrid. 13,18,[24][25] It is worth mentioning that a slot-line based on the 180°hybrid is used to provide a bandwidth of 21.7% and high isolation of 50 dB. 13 Recently, the differential feeding technique has been widely applied to improve isolation.…”

Section: Introductionmentioning

confidence: 99%

Wideband dual‐polarized antenna with high isolation for full‐duplex application

Zhu

Yang

et al. 2022

Micro & Optical Tech Letters

View full text Add to dashboard Cite

show abstract

“…4 In a dual-band full-duplex antenna, two frequency bands are used for transmitting and receiving operations, and the isolation is comparatively easier to achieve as the out-of-band interferences can certainly be reduced using isolation techniques like polarization, differential fed, filtering, and so on. Some prominent methods like dual-polarization, 5 feding networks using printed Ring hybrid coupler, 6,7 and defected ground structures (DGS) 8,9 and so on, are implemented to create isolation between the ports of the antenna. But the above-mentioned methods have some limitations like insufficient isolation required for full-duplex performance, narrow bandwidth, and irregular radiation pattern.…”

mentioning

confidence: 99%

Dual‐band full‐duplex antenna with high isolation using differential fed and dual‐polarization

Prasad

Singh

Tripathi

et al. 2022

Micro & Optical Tech Letters

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This study proposes a new design approach for a dual‐band full‐duplex antenna to achieve high interport isolation using the differential fed technique. It consists of a single radiating patch, a differential fedline, and a direct fedline. A slotline‐based balun is used in the design to implement the differential fed, which offers minimum phase and magnitude imbalances to the patch of the antenna. The differential fed and direct‐fed lines are orthogonally connected to the radiating patch to realize dual polarization. Both the dual‐polarization and differential fed techniques help to improve the interport isolation of the antenna. It offers an interport isolation of more than 51 and 53 dB over the entire lower and higher operating bands, resonating at 3.22 and 4.1 GHz with 84 and 110 MHz bandwidths. To validate the proposed antenna, a prototype has been fabricated on an FR‐4 substrate with the dimensions of (1.79 × 1.79 × 0.017)λg (λg is the guided wavelength in the substrate at the lower frequency f1), with measured results consistent well with simulations. The far‐field measurement exhibits that the proposed antenna provides a unidirectional broadside radiation pattern and achieves a minimum cross‐polarization of less than −38 dB in all directions and less than −42 dB in the direction of the main lobe in both E‐ and H‐planes at the resonant frequencies. The antenna has insignificant backward radiation with the front‐to‐back ratio bold-italic≥ ${\boldsymbol{\ge }}$20 dB when port1 is active and the front‐to‐back ratio bold-italic≥ ${\boldsymbol{\ge }}$30 dB when port2 is active. Moreover, the proposed antenna design is simple and easy to fabricate as the differential fed is implemented using the slotline‐based balun within the same general purpose FR‐4 substrate layer. This eliminates the need for any additional and separate circuits for differential fed and minimizes the overall volume of the antenna.

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A Dual Band Full-Duplex Monopole Antenna for WLAN Application

Cited by 2 publications

References 9 publications

Wideband dual‐polarized antenna with high isolation for full‐duplex application

Wideband dual‐polarized antenna with high isolation for full‐duplex application

Dual‐band full‐duplex antenna with high isolation using differential fed and dual‐polarization

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