High Port-to-Port Isolation Dual-Polarized Antenna Array Dedicated for Full-Duplex Base Stations

Wójcik, D.; Surma, Maciej; Нога, А.; Magnuski, Mirosław

doi:10.1109/lawp.2020.2989698

Cited by 30 publications

(11 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In-band full-duplex (IBFD) or simultaneous transmit and receive (STAR) wireless systems has the potential of doubling the spectrum efficiency without increasing frequency bandwidth. To enhance the isolation, self-interference cancellation methods [1][2][3][4] and polarization diversity methods [5][6][7][8] have been intensively investigated in antenna designs. High isolation can also be obtained by utilizing the 180 hybrid couplers or circulators in the feeding networks.…”

Section: Introductionmentioning

confidence: 99%

Compact in‐band pattern diversity antenna for wireless applications

Mao

et al. 2021

Micro & Optical Tech Letters

View full text Add to dashboard Cite

A compact pattern diversity patch antenna working at 5.8 GHz is proposed. The patch antenna has two ports, which are responsible for the broadside radiation and omni‐directional radiation, respectively. The broadside radiation is achieved by inserting a substrate slot‐loaded integrated waveguide (SIW) cavity at the center of the patch antenna, and the omni‐directional pattern is realized by exciting the shorted patch in‐phase from both sides of the SIW cavity. Although the two operating modes share the same radiator, but a high isolation of over 30 dB is achieved, due to the cancellation of current at the inputs. In addition, two approaches are investigated to enhance the operation bandwidths. The pattern diversity antenna is prototyped and measured, showing an impedance bandwidth of 5.69–5.92 GHz for both modes/channels, and a high inter‐channel isolation over 30 dB, making it suitable for indoor wireless communication systems.

show abstract

Section: Introductionmentioning

confidence: 99%

Compact in‐band pattern diversity antenna for wireless applications

Mao

et al. 2021

Micro & Optical Tech Letters

View full text Add to dashboard Cite

show abstract

“…For achieving isolation at the antenna stage, several cancellation techniques have been reported in the literature. These techniques include polarization diversity, 2–4 electromagnetic bandgap structures, neutralization line, 5 defected ground structures (DGS), 6 placement of absorbers between antennas, 7 feed‐forward loop with phase shifter and attenuator, 8 circulator, 9 circular array, 10 wavetraps, 180° hybrid, 11,12 phase shifter and power divider 13,14 filter, 15 reflective terminal 16 . Among the above reported techniques, pattern/polarization diversity, 2 neutralization line, 5 DGS 6 are widely used in multiple input multiple output (MIMO) antenna.…”

Section: Introductionmentioning

confidence: 99%

An in‐band full‐duplex antenna for dual‐band application

Kumari

Jaiswal

Srivastava

2021

Micro & Optical Tech Letters

View full text Add to dashboard Cite

A dual‐band, dual‐polarized in‐band full‐duplex antenna with good isolation performance is presented for wireless local area network (WLAN) applications. A neutralization line is connected between the grounds of the transmitter (Tx) and receiver (Rx) antennas to enhance the isolation. Further enhancement in isolation is achieved by using a 180° ring hybrid coupler between receiving antenna elements. Here the dual‐band monopole antennas are used as transmitting and receiving antenna elements. For better isolation, the receiving antenna elements are placed opposite to each other and fed through the differential ports of the 180° ring hybrid coupler. The proposed structure is fabricated, and the comparison of measured results and simulated results are studied. The simulated and measured impedance bandwidths (≤−10 dB) of the antenna cover the entire 2.4 GHz WLAN band (2.4–2.48 GHz), and for this band, the measured isolation is better than 40 dB. For the higher band, the measured isolation is more than 40 dB for 200 MHz (5.15–5.35 GHz) of bandwidth. The simulated radiation patterns of the antenna are well‐matched with the measured patterns at both the frequencies.

show abstract

“…Even if complex feeding methods such as a differential-driven antenna [8,9], hybrid-fed techniques [10] or aperture-coupled with specific slot shapes are taken in consideration, the maximum level of isolation will attain 40 dB [11,12]. For this reason, increasing the port-to-port isolation of microstrip antenna arrays could be achieved by applying dedicated feeding networks that utilise compensation of the crosstalk between the array ports by means of the pairwise anti-phased feeding technique where couples of radiators which are the image mirror one of another are fed by currents shifted by 180 • in the phase [13][14][15][16][17][18]. The application of this technique contributes to an increase in isolation to over 50 dB [16][17][18] and polarisation purity to more than 36 dB [19].…”

Section: Introductionmentioning

confidence: 99%

“…This is observed especially when the radiators and FN are located on the same layer of printed circuit board (PCB). In such a case, even after the optimisation process, it is difficult to obtain isolation better than 50 dB [13,14,24]. The achievement of higher isolation requires the use of multilayer PCBs in which radiators and FN are separated by means of ground planes [9,[25][26][27].…”

Section: Introductionmentioning

confidence: 99%

“…This paper describes the design process of the dual-polarisation linear antenna arrays using a four-element antenna array for U-NII 5.15-5.925 GHz frequency band as an example. In comparison to earlier works by the same authors [13,14], this paper contains a detailed description of the array design: a presentation of the theoretical model for port-to-port isolation, a discussion of the influence of mechanical symmetry and couplings between the radiators and/or FN on port-to-port isolation and a description of the method of selection of the feeding network elements performed by circuit and full-wave simulations. In practical realisations of the antenna arrays described in this paper, electromagnetically coupled microstrip antennas (ECMSA) are utilised as a single radiator [34].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

On the Design of Dual-Polarised Linear Antenna Arrays with Enhanced Port-to-Port Isolation

Wójcik

Surma

Нога

et al. 2020

Sensors

Self Cite

View full text Add to dashboard Cite

The paper describes the process of designing a dual-polarised linear antenna array with enhanced port-to-port isolation, with the example of a four-element array with isolation better than 60 dB for the U-NII 5.15–5.925 GHz band. As a single antenna, dual-polarised electromagnetically coupled microstrip antennas were used with port-to-port isolation not exceeding 25 dB. A significant improvement in the isolation of the array was achieved thanks to the application of a dedicated feeding network. On the basis of theoretical analysis, a mathematical model describing port-to-port isolation was developed. Circuit and full-wave simulations were carried out to show the influence of electromagnetic couplings between antennas and/or the microstrip lines of the feeding network and the selection of phase shifters/power dividers on the isolation. The fabricated prototype is characterised by a gain of about 14 dBi, polarisation purity of at least −27 dB within the main lobe and close to expectations isolation better than 57 dB within the whole operational band.

show abstract

High Port-to-Port Isolation Dual-Polarized Antenna Array Dedicated for Full-Duplex Base Stations

Cited by 30 publications

References 14 publications

Compact in‐band pattern diversity antenna for wireless applications

Compact in‐band pattern diversity antenna for wireless applications

An in‐band full‐duplex antenna for dual‐band application

On the Design of Dual-Polarised Linear Antenna Arrays with Enhanced Port-to-Port Isolation

Contact Info

Product

Resources

About