Compact planar multiband MIMO antenna based on composite right/left‐handed transmission line for mobile phone applications

Saxena

Int J RF Mic Comp-Aid Eng

et al. 2022

In this article, a Super‐wideband (2.6–22 GHz) two‐elements multiple‐input‐multiple‐output antenna (MIMO) is presented with a dimension of 49 × 54.5 × 1.6 mm3 on an FR‐4 substrate. The antenna is also exhibited dual circular polarization (RHCP and LHCP) simultaneously at two separate ports at four frequencies of 5.2, 11.5, 14.66, and 16.75 GHz, which are extensively utilized for WLAN, X, and Ku‐band applications. Four EBG cells of various sizes have been installed across the feed line to maintain the antenna's efficiency and control the specific absorption rate (SAR). The antenna has a minimum isolation of 17 dB (20 dB for the important portion) in Super‐wideband (SWB) and excellent diversity performance. Simulated results of antenna‐like return loss, isolation, and diversity parameters have also been verified experimentally, which are in the acceptable range. Also, the calculated maximum SAR at 10 g is 1.095 W/kg with the head voxel model at 3.5 GHz.

Section: Introductionmentioning

confidence: 99%

Quad‐band circularly polarized super‐wideband MIMO antenna for wireless applications

Saxena

Int J RF Mic Comp-Aid Eng

et al. 2022

Int. J. Microw. Wireless Technol.

“…Jointly such a system can provide a robust link. A multiband 10 antenna array for the next-generation smartphones is proposed which covers LTE bands 42/43 (3.4–3.8 GHz) and the additional LTE band 46 (5.15–5.925 GHz) and also offers polarization and pattern diversity [1]. A triple-band MIMO antenna using a rectangular SRR, a stepped impedance resonator, and a slot is made-up for WiMAX/WLAN communication with good diversity performance [2, 3] and it can also be tuned for different frequency bands of wireless applications.…”

Section: Introductionmentioning

confidence: 99%

Four-element pentaband MIMO antenna for multiple wireless application including dual-band circular polarization characteristics

Saxena

Awasthi

Jain

2021

In this article, a meander line-shaped pentaband (2.18–2.24, 2.38–2.46, 2.65–2.70, 3.10–3.32, 3.38–3.46 GHz) four-element multiple-input–multiple-output antenna is presented. The proposed antenna is also circularly polarized in two bands (at 2.2 and 2.4 GHz) with dual-polarization like right-handed at port 1 or 3 and left-handed at port 2 or 4, which is widely used for mobile satellite services (MSS) and Internet of Things applications. This antenna is designed and fabricated with compact size 50 × 70 × 1.6 mm3 on the FR-4 substrate with good diversity performance in pentaband. Simulated results of antenna-like return loss, isolation, and parameters-related diversity have also been tested experimentally in a controlled environment, which is within the permissible limit. The designed antenna will be appropriate for MSS, industrial scientific and medical (ISM), broadband radio services and educational broadband services, WiMAX radio location services, and amateur radio services. Meanwhile, specific absorption rate of the designed antenna has been examined in an empirical environment for the Fresnel radiating near-field applications.

“…Wireless channel capacity can be increased without the necessity for additional spectra or power in environments rich in scattering when introducing 5G mobile communication techniques [8][9][10]. This can be applied by increasing the number of antennas at the transmitter and/or the receiver of the wireless link [11][12][13][14][15][16][17][18][19]. As a consequence of requiring multiple antennas in a compact system like a mobile handset, the single antenna should be compact and operate at different required bands as required [20,21].…”

Section: Introductionmentioning

confidence: 99%

“…The frequency bands centered at 28, 38, 60, and 73 GHz have been allocated for 5G mobile communications by the International Telecommunications Union (ITU) [27]. Bands of 59-64 GHz are allocated by the 2 of 19 Federal Communications Commission (FCC) as an unlicensed band for short-range and wireless communications at high speeds [28]. The frequency band around 60 GHz has particular importance because of the wide 7-9 GHz frequency range of unlicensed spectra available.…”

Section: Introductionmentioning

confidence: 99%

A Novel Dual-Band (38/60 GHz) Patch Antenna for 5G Mobile Handsets

Sharaf

Zaki

Hamad

et al. 2020

Sensors

A compact dual-frequency ( 38 / 60 GHz ) microstrip patch antenna with novel design is proposed for 5G mobile handsets to combine complicated radiation mechanisms for dual-band operation. The proposed antenna is composed of two electromagnetically coupled patches. The first patch is directly fed by a microstrip line and is mainly responsible for radiation in the lower band ( 38 GHz ). The second patch is fed through both capacitive and inductive coupling to the first patch and is mainly responsible for radiation in the upper frequency band ( 60 GHz ). Numerical and experimental results show good performance regarding return loss, bandwidth, radiation patterns, radiation efficiency, and gain. The impedance matching bandwidths achieved in the 38 GHz and 60 GHz bands are about 2 GHz and 3.2 GHz , respectively. The minimum value of the return loss is − 42 dB for the 38 GHz band and − 47 for the 60 GHz band. Radiation patterns are omnidirectional with a balloon-like shape for both bands, which makes the proposed single antenna an excellent candidate for a multiple-input multiple-output (MIMO) system constructed from a number of properly allocated elements for 5G mobile communications with excellent diversity schemes. Numerical comparisons show that the proposed antenna is superior to other published designs.