Dual-Polarized, Differential Fed Microstrip Patch Antennas With Very High Interport Isolation for Full-Duplex Communication

Nawaz, Haq; Tekin, İbrahim

doi:10.1109/tap.2017.2765829

Cited by 120 publications

(90 citation statements)

References 16 publications

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“…Designs in [4]- [5] are the single-ended dual-polarized antennas, and they have the moderate port isolation and crosspolarization level. Antennas in [16] and [21]- [23] are driven by the differential method, and high port isolation is achieved. However, high antenna port isolation does not promise the low crosspolarization level.…”

Section: B Antenna Arraymentioning

confidence: 99%

“…Although antenna in [16] has the widest impedance bandwidth, its profile is the largest. By using 180º ring hybrid coupler, the dual-polarized antenna in [23] obtains highest port isolation and lowest cross-polarization level. However, additional insertion loss is introduced with a very narrow bandwidth.…”

Section: B Antenna Arraymentioning

confidence: 99%

“…Undesired insertion loss and impedance mismatching will be introduced. Accordingly, differentially driven antennas [17]- [23] are developed to meet these requirements. In [21], a wideband differentially driven dualpolarized antenna is proposed with the impedance bandwidth of 19%.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the measured cross-polarization level is only -16 dB in the broadside direction. By using 180º ring hybrid coupler, the differentially driven antenna in [23] achieves high isolation (higher than 62 dB) and low cross-polarization (lower than -50 dB), but its impedance bandwidth is quite narrow.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A Low-Cost Differentially Driven Dual-Polarized Patch Antenna by Using Open-Loop Resonators

Wen

Gao

Luo

et al. 2019

IEEE Trans. Antennas Propagat.

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A novel differentially driven dual-polarized patch antenna is presented in this communication. The proposed antenna is a low-cost design with a simple configuration, which avoids using the conventional high cost multi-layer PCB technology. The antenna is composed of two intersected open loop resonators, which are connected to each other at the center. By using the electric coupling from the intersected resonators, two orthogonal radiating modes are excited from the top radiating patch. With the even and odd mode current distributions on the intersected resonators, high port isolation and low cross-polarization level are obtained. The external quality factor of the resonator is illustrated by using the analytical model of a double loaded resonator. To demonstrate the design method, the proposed antenna and array are designed, fabricated, and measured. Compared to the traditionally designed capacitively coupled antenna, two times wider impedance bandwidth is obtained for the proposed antenna with high isolation (>38.5 dB) and low cross-polarization level (<-33 dB). The antenna array is designed for 5G base stations, which features the compact size and low reflection coefficient (<-15 dB). In addition, beam scanning performance of the antenna array is also investigated for base station applications. Index Terms-Differentially driven antenna, dual-polarized antenna, open loop resonators.

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Section: B Antenna Arraymentioning

confidence: 99%

Section: B Antenna Arraymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Low-Cost Differentially Driven Dual-Polarized Patch Antenna by Using Open-Loop Resonators

Wen

Gao

Luo

et al. 2019

IEEE Trans. Antennas Propagat.

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“…Such antenna at transceiver front end prevents the saturation of receiver from high power SI signal . Normally, such monostatic patch antenna is orthogonally polarized(dual polarized) and high interport isolation is achieved by this polarization diversity in addition to differential feeding mechanism and analog/RF self‐interference cancellation (RF‐SIC) circuits . In such antenna systems, the polarization diversity provides inherent isolation of around 40‐45 dB through uncorrelated transmit (T x ) and receive (R x ) radio signal having same carrier frequency .…”

Section: Introductionmentioning

confidence: 99%

Co‐polarized monostatic antenna with high Tx–Rx isolation for 2.4 GHz single channel full duplex applications

Nawaz

Gürbüz

Tekin

2018

Micro & Optical Tech Letters

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This article presents a linear co‐polarized (same polarization for transmit and receive modes), proximity coupled monostatic patch antenna with high port to port RF isolation for 2.4 GHz single channel full duplex (SCFD) wireless applications. The presented proximity coupled monostatic patch antenna deploys differential feeding for receive (Rx) mode to significantly suppress RF leakage from transmit (Tx) port and external single‐tap self‐interference cancellation (SIC) circuit provides additional interport isolation. The measurements for implemented prototype of antenna in lab environment provide around 50 dB Tx–Rx isolation for 50 MHz bandwidth in addition to better than 75 dB peak isolation. Moreover, the deployed single‐tap RF SIC circuit can be used to suppress SI resulted from environmental reflections and 50 MHz SIC bandwidth with 50 dB isolation can be tuned within antenna's 10 dB return loss impedance bandwidth of 150 MHz.

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Full‐Duplex Communications Antennas

Smida,

Khaledian,

Farzami

et al. 2024

Encyclopedia of RF and Microwave Engineering

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Single‐antenna in‐band full‐duplex communication technology has the potential to substantially increase spectral efficiency. However, the implementation of full‐duplex systems is constrained by the cancellation of self‐interference (SI). This chapter provides an overview of all methodologies used to maintain a low level of SI in real‐time. First, a new analog SI cancellation technique is proposed. A radiofrequency (RF) circulator is used to separate transmitted (Tx) and received (Rx) signals. Instead of estimating the SI signals and subtracting them from the Rx signals, the inherent secondary SI signals at the circulator, reflected by the antenna, is used to cancel the primary SI signals leaked from the Tx port to the Rx port. The frequency response of the secondary SI signals is modified through a reconfigurable impedance mismatched terminal (IMT) circuit, which consists of two varactor diodes at the antenna port. The IMT adjustability makes it robust to antenna input impedance variations and fabrication errors. Second, a comprehensive residual SI model based on a direct‐conversion transceiver structure considering nonlinearities of all the transceiver radio frequency components, in‐phase/quadrature (IQ) imbalances, phase noise effect, and receiver noise figure is offered. A more appropriate digital SI cancellation approach considering receiver chain RF and baseband (BB) nonlinearities is proposed to validate this model. Finally, a prototype of the proposed technique at 2.45 GHz is analyzed and fabricated. An analog cancellation exceeding 40 dB over 65 MHz of bandwidth is achieved. The performance of the digital cancellation strategy is investigated and it achieves 20 dB more cancellation compared to existing methods.

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Dual-Polarized, Differential Fed Microstrip Patch Antennas With Very High Interport Isolation for Full-Duplex Communication

Cited by 120 publications

References 16 publications

A Low-Cost Differentially Driven Dual-Polarized Patch Antenna by Using Open-Loop Resonators

A Low-Cost Differentially Driven Dual-Polarized Patch Antenna by Using Open-Loop Resonators

Co‐polarized monostatic antenna with high Tx–Rx isolation for 2.4 GHz single channel full duplex applications

Full‐Duplex Communications Antennas

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