Bandwidth-Enhanced Circularly Polarized Slot Antenna and Array Under Two Pairs of Degenerate Modes in a Single Resonant Cavity

Chen, Rui‐Sen; Huang, Guan‐Long; Wong, Sai‐Wai; Al-Nuaimi, Mustafa K. Taher; Tam, Kam‐Weng; Choi, Wai‐Wa

doi:10.1109/lawp.2022.3209494

Cited by 16 publications

(6 citation statements)

References 29 publications

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“…The results demonstrate that the proposed antenna array has smaller dimensions compared to those presented in [32][33][34]. Additionally, the impedance bandwidth and AR bandwidth are superior to [20,32,33]. Although the peak gain is lower than [20,32], the smaller size of the proposed array is also noteworthy.…”

Section: Simulated and Measured Results Of The Array Antennamentioning

confidence: 84%

“…For example, in [19], an artificial magnetic conductor (AMC) reflector-backed antenna was proposed, but its complex structure and decreased gain at high frequencies limit its practicality. Cavity-backed slot antennas, on the other hand, have become popular due to their promising radiation characteristics and are commonly used in communication systems [20]. Various types of CP cavity-backed antennas, such as substrate-integrated waveguide (SIW) cavities, have been reported as well [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

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Development of a Broadband and High-Gain Circularly Polarized Array of Multilayer Slot Antennas for X-Band Wireless Communication Networks

Saghafi,

Kazemi,

Hamlbar Gerami

2023

International Journal of RF and Microwave Computer-Aided Engine

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This paper presents a wideband cavity-backed slot antenna array designed for X-band wireless communication systems. The antenna element consists of a circular slot combined with a cross-slotted patch; both are fed by an L-shaped microstrip line through proximity coupling to extend the impedance bandwidth and gain. The reduction of beam squint in the radiation patterns, caused by the asymmetric feed line, is achieved through intelligent optimization of the dimensions and position of the cross slot on the patch. Additionally, a back cavity is included to provide unidirectional radiation and enhance gain. The antenna exhibits right-hand circularly polarized (RHCP) radiation patterns with high gain over a wideband frequency range. To further improve the axial ratio (AR) bandwidth and gain, the antenna is utilized in a 2 × 2 array configuration with a sequential rotation feed network. The overall dimensions of the proposed array are 1.42 λ 0 × 1.42 λ 0 × 0.45 λ 0 , where λ 0 represents the wavelength at the center frequency of 10 GHz. The fabricated array is then tested, and the measurements show an impedance bandwidth of 60% (7 GHz-13 GHz) with S 11 < − 10 dB, a 3 dB AR bandwidth of 42% (7.45-11.65 GHz), and a peak gain of 11.14 dB. The simulated and measured results exhibit good agreement, validating the effectiveness of the design.

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Section: Simulated and Measured Results Of The Array Antennamentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Development of a Broadband and High-Gain Circularly Polarized Array of Multilayer Slot Antennas for X-Band Wireless Communication Networks

Saghafi,

Kazemi,

Hamlbar Gerami

2023

International Journal of RF and Microwave Computer-Aided Engine

View full text Add to dashboard Cite

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“…Antennas are an essential component of wireless technology. Their application in 5G communication is highly dynamic depending upon different specific requirements such as broad bandwidth [2], [3], polarization agility, reconfigurability [4], etc., along with common basic parameters. To satisfy the large throughput requirement for a 5G mobile terminal, a multiple antenna-element based MIMO antenna array is employed in the mobile terminal, which leads to the three main aspects of the 5G mobile terminal MIMO antenna, namely, antenna placement, bandwidth, and compatibility for users.…”

Section: Introductionmentioning

confidence: 99%

Wideband Monopole Eight-Element MIMO Antenna for 5G Mobile Terminal

et al. 2023

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An eight-element wideband multiple-input multiple-output (MIMO) antenna for the fifthgeneration (5G) mobile terminal is proposed. The antenna elements are placed along both long side edges of the mobile terminal with a profile of 6 mm. The proposed monopole-inspired antenna element shows a good impedance match, isolation, and diversity parameter across a very wide bandwidth of 78 % (3.2-7.3 GHz), and it can cover the 5G NR n77/n78/n79/n96, LTE 46, and WLAN 5 GHz bands. The result shows that the MIMO antenna can offer inter-element isolation better than 12 dB, envelope correlation coefficient (ECC) below 0.069, and a peak channel capacity of 42.7 bps/Hz across the desired 5G bands. The specific absorption rate (SAR) analysis of the proposed MIMO antenna with a human head has exhibited SAR levels (0.41 W/Kg and 0.33 W/Kg at two resonating frequencies 3.9 GHz and 5.8 GHz, respectively) much lower than the Federal Communications Commission (FCC) permissible limit (1.6 W/Kg over 1 gram tissue).INDEX TERMS 5G mobile, MIMO antenna, specific absorption rate (SAR), sub-6 GHz, wideband.

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“…Millimeter-wave beam-forming networks have become an important part of the Fifth Generation (5G) cellular network, both now and in the future, because they make it easier to pick up signals and can handle more traffic. In this way, a beam-forming network is made up of the beam former, like a common Butler matrix [1], Nolen matrix [2], or Blass matrix [3], and the antenna array that is connected to the beam former [4]. Hence, the antenna is an important device that should provide high gain, wider bandwidth, and high efficiency.…”

Section: Introductionmentioning

confidence: 99%

Design and Fabrication of Waveguide Slot Antenna Using 3D Printing for 5G Application

et al. 2023

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This research constructs a 26 GHz waveguide slot antenna with decent gain. The application of millimeter-wave requires high bandwidth and gain to increase the traffic and users for millimeter-wave and 5G technology. The application of millimeter waves requires a high gain and bandwidth to achieve the requirements of traffic and users increasing for 5G technology and existing millimeter-wave. High-gain and power handling are provided by waveguide slot antennas. Three waveguide structures which are two waveguide antennae and a waveguide horn have been simulated by using CST and fabricated by a 3D printer. The tilt technique has been used with a waveguide to increase the bandwidth and gain of an antenna. A waveguide with broad wall tilt slots has one diction beam while a waveguide with broad and narrow wall tilt slots has two direction beams, each length of the wall enough to distribute six symmetric tilt slots. The gain of 14.3 dB and 1.9 GHz bandwidth are recorded for an antenna with broad wall tilt slots with one beam. While the waveguide with broad and narrow wall tilt slots achieved a gain of 13.9dB and a bandwidth of 1.9 GHz. The proposed antenna is a decent candidate for use with millimeter waves.

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Bandwidth-Enhanced Circularly Polarized Slot Antenna and Array Under Two Pairs of Degenerate Modes in a Single Resonant Cavity

Cited by 16 publications

References 29 publications

Development of a Broadband and High-Gain Circularly Polarized Array of Multilayer Slot Antennas for X-Band Wireless Communication Networks

Development of a Broadband and High-Gain Circularly Polarized Array of Multilayer Slot Antennas for X-Band Wireless Communication Networks

Wideband Monopole Eight-Element MIMO Antenna for 5G Mobile Terminal

Design and Fabrication of Waveguide Slot Antenna Using 3D Printing for 5G Application

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