Planar patch antenna system with high isolation for full‐duplex applications

Nguyen, Tuan; Karacolak, Tutku

doi:10.1049/el.2019.3059

Cited by 11 publications

(3 citation statements)

References 8 publications

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“…So various SIC techniques are used to achieve additional isolation on the top of polarization isolation for the case of single-patch antenna-based IBFD transceiver. For instance, the addition isolation can be achieved through SIC techniques based on differential feeding employed at T x or R x ports [9][10][11][12][13], by using impedance mismatched terminal circuit for inherent SI suppression [14] or through double differential feeding at both ports for effective SIC [15]. The differential feeding is a near-filed SIC technique to provide very high interport isolation levels for such antennas [9][10][11][12][13]15].…”

Section: Introductionmentioning

confidence: 99%

Stacked patch antenna with wider impedance bandwidth and high interport isolation for 2.4 GHz IBFD transceiver

Nawaz

Niazi

2021

Int. J. Microw. Wireless Technol.

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This paper reports a bi-port, wideband, parasitic-fed, single/shared patch antenna with enhanced interport isolation for 2.4 GHz in-band full duplex (IBFD) applications. The employed parasitic feeding provides comparatively the wider impedance bandwidth and better gain for the presented antenna. The improved self-interference cancellation (SIC) levels across the required bandwidth are obtained through differentially-driven receive (Rx) mode operation. The differential Rx operation performs effective cancellation of in-band self-interference (SI) through signal inversion mechanism to achieve the additional isolation on the top of the intrinsic isolation of polarization diversity. The validation model for the presented antenna features ≥88 dB peak isolation between the dual-polarized Tx and Rx ports. In addition, the measured Tx–Rx isolation for prototype is >70 dB across the 10 dB return loss bandwidth of 100 MHz (2.42–2.52 GHz). The measured gain for each mode is better than 7.0 dBi. The novelty of this work is that compared to previously reported designs, the presented antenna offers wider impedance bandwidth and improved SIC levels in addition to superior gain performance. To the best of our knowledge, this is the first single/shared patch antenna which provides better than 70 dB interport isolation across the 10 dB return loss bandwidth of 100 MHz along with 7.0 dBi gain for Tx/Rx modes.

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Section: Introductionmentioning

confidence: 99%

Stacked patch antenna with wider impedance bandwidth and high interport isolation for 2.4 GHz IBFD transceiver

Nawaz

Niazi

2021

Int. J. Microw. Wireless Technol.

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“…[6][7][8] The additional isolation on the top of polarization diversity isolation can be achieved through various techniques. For instance, these techniques include the use of differential feeding at T x /R x ports, [9][10][11][12][13][14] inherent SI suppression through reconfigurable impedance mismatched terminal circuit 15 and deploying the differential feeding at both T x and R x ports simultaneously for effective SIC operation to achieve very high isolation levels. 16 Although, the differential feeding provides excellent isolation levels for monostatic antennas; however, the isolation levels are significantly degraded by the environmental reflections for such antennas when these are deployed for real-time communication between two wireless nodes.…”

Section: Introductionmentioning

confidence: 99%

“…The additional isolation on the top of polarization diversity isolation can be achieved through various techniques. For instance, these techniques include the use of differential feeding at T x /R x ports, 9‐14 inherent SI suppression through reconfigurable impedance mismatched terminal circuit 15 and deploying the differential feeding at both T x and R x ports simultaneously for effective SIC operation to achieve very high isolation levels 16 …”

Section: Introductionmentioning

confidence: 99%

High isolation, proximity‐fed monostatic patch antennas with integrated self‐interference cancellation‐taps for ISM band full duplex applications

Nawaz

Niazi

Chaudhry

2020

Int J RF Microw Comput Aided Eng

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This work presents two dual polarized proximity-fed monostatic patch antennas with improved interport isolation for 2.4 GHz industrial, scientific and medical band same frequency full duplex wireless applications. The presented antennas achieves the high interport decoupling through intrinsic isolation of the polarization diversity in conjunction with a simple single-tap and two-taps self-interference cancellation (SIC) topologies. The polarization diversity isolation is achieved through two perpendicular microstrip feeds for proximity feeding to excite orthogonal polarization mode for transmit (T x) and receive (R x) modes. The prototype for proposed antenna with integrated single-tap and two-taps SIC circuit is tested to record its interport isolation, impedance bandwidths and gains for both T x and R x ports. The implemented antenna with single-tap SIC circuit demonstrates 10 dB return-loss bandwidth of ≥100 MHz for both T x and R x ports. The measured isolation exceeds 40 dB over the 40 MHz bandwidth. Moreover, the recorded peak isolation is better than 74 dB for implemented antenna prototype. Furthermore, the 40 MHz bandwidth with 40 dB isolation can be tuned with the help of SIC-tap as demonstrated through the experimental results. The measured gain levels are around 4.6 dBi for both T x and R x port. The same antenna structure with integrated two-taps SIC topology features better than 55 dB isolation within 10 dB return loss bandwidth of 100 MHz. The peak isolation exceeds 97 dB and isolation levels are better than 60 and 80 dB over 50 and 20 MHz bandwidths, respectively, for presented antenna with two-taps SIC configuration. The compact antenna offers comparatively wider impedance and isolation bandwidth with improved SIC levels compared to previous designs.

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Wideband Metasurface Antenna for In‐Band Full‐Duplex Applications

Li,

Yang,

2024

Int J Communication

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This article proposes a novel metasurface patch antenna with characteristics of metasurface and broadband for in‐band full‐duplex applications, which is configured with a parasitic metasurface, a square patch, two separated feeding networks for transmitting and receiving ports (Tx and Rx), and a square ground. Two feeding networks consist of an antisymmetric L‐shaped probe feeding structure for Rx and a double F‐shaped feeding structure with a 3 dB/180° hybrid coupler for the Tx port to achieve ±45° polarization and significantly enhanced isolation between the ports. Most importantly, the proposed parasitic metasurface realizes good impedance matching and improves realized gain. Therefore, the proposed antenna attains a −10 dB of overlapped bandwidth of 52.6% through 1.7 to 2.7 GHz with a high isolation of over 41.5 dB. Additionally, the measured gains are 8.9 ± 1.1 dBi for the Rx port and 7.4 ± 0.9 dBi for the Tx port, respectively. These characteristic data all support that the proposed antenna will play an essential role in IBFD applications.

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Planar patch antenna system with high isolation for full‐duplex applications

Cited by 11 publications

References 8 publications

Stacked patch antenna with wider impedance bandwidth and high interport isolation for 2.4 GHz IBFD transceiver

Stacked patch antenna with wider impedance bandwidth and high interport isolation for 2.4 GHz IBFD transceiver

High isolation, proximity‐fed monostatic patch antennas with integrated self‐interference cancellation‐taps for ISM band full duplex applications

Wideband Metasurface Antenna for In‐Band Full‐Duplex Applications

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