A Dual-Band Multiport MIMO Slot Antenna for WLAN Applications

In this article, miniaturization of dual‐band slot antenna design for GPS, WLAN and amateur radio applications is presented. The proposed dual‐band miniaturized antenna is achieved using slits, rectangular split ring and metallic strips fed by 50 Ω microstrip feed. The first resonant frequency is achieved by loading reference antenna with eight slits that is antenna 1 and the second resonant frequency is achieved by loading with one center slits and rectangular split ring that is antenna 2. Dual‐band antenna is achieved by loading reference slot antenna with nine slits and rectangular split ring which resonates at frequency of 1.52 and 3.03 GHz respectively. As a result, it is achieved 53.79% reduction in first band resonant frequency with 76.07% improvement in −10 dB bandwidth and 7.90% reduction in second band resonant frequency compared to reference slot antenna. Further, this dual‐band antenna is miniaturized by metallic strips which are placed on the bottom of the substrate. This results in 61.39% reduction in first band resonant frequency with 32.07% improvement in −10 dB bandwidth and 26.13% reduction in second band resonant frequency in comparison with reference slot antenna topology.

Section: Introductionmentioning

confidence: 99%

Miniaturized dual‐band slot antenna design for GPS, amateur radio and WLAN applications

Haque

Alam

2020

“…The effect of slot etching on radiator/ground plane offers wider bandwidth, compact size, and offers significant amount of mutual coupling reduction between radiating elements . The slotted strips in PIFA antenna with polarization diversity technique provides stability in gain, high isolation, and helps in compactness of the design and is utilized for LTE/WiMAX bands …”

Section: Introductionmentioning

confidence: 99%

Offset planar MIMO antenna for omnidirectional radiation patterns

Malviya

Kartikeyan

Panigrahi

2018

An offset quad element multi‐band planar MIMO antenna with omnidirectional radiation patterns is proposed for nonline of site (NLOS) communication on low‐cost FR‐4 dielectric substrate for 4G and future technologies. A 1 × 2 power divider arm results in dual beam and enhances diversity parameters and omnidirectional radiation patterns. Moreover, the MIMO antenna limits the proximity/coupling effects using a T‐shaped isolator and achieves more than 12.4 dB of isolation between the radiating ports. The proposed design covers WLAN/WiMAX bands with gain and radiation efficiency of more than 2.6 dBi and 71%, respectively, in 2:1 VSWR bands of bandwidths 16.39% (2.24‐2.64 GHz) and 7.88% (3.41‐3.69 GHz). The −10 dB impedance bandwidth is more than 280 MHz in each band. An ECC level of ≤ 0.01 has been achieved in the whole band.

“…It is more convenient to use a multiband antenna instead of multiple antenna elements to operate in multiband, because the latter leads to increase in size of the device. Various techniques to design single band, multiband, and UWB MIMO antenna are reported in recent years in engineering community . In Ref.…”

Section: Introductionmentioning

confidence: 99%

“…A multiport antenna for dual‐band operations is proposed in Ref. , isolation of this antenna is about 12 dB. A SRR loaded dual‐band antenna is proposed for MIMO applications in Ref.…”

Section: Introductionmentioning

confidence: 99%

Design of a compact triple band antenna with independent frequency tuning for MIMO applications

Islam

Kumar

Sen

et al. 2018

In this article, a planar, low profile microstrip line‐fed triple band multiple input multiple output (MIMO) antenna is presented for WiMax (2.5/3.5/5.5 GHz)/WLAN (2.4/3.6/5.8 GHz) applications simultaneously. The single element of the MIMO antenna consists of (i) a rectangular split ring resonator (SRR), (ii) a stepped impedance resonator (SIR) inside the SRR and (iii) a slot on the SIR. Each of the resonators generates its own individual band and each band is independently tunable. The antenna exhibits three operating bands at 2.35‐2.85 GHz, 3.25‐3.90 GHz and 5.45‐5.65 GHz. Four antenna elements are used to design the proposed MIMO antenna. The simulated results are observed and reported in terms of S‐parameters, gain, radiation patterns, envelope correlation coefficient (ECC), diversity gain (DG), channel capacity loss (CCL) and total active reflection coefficient. ECC and CCL are within the acceptable range defined for 4G and 5G application standards. To validate the simulation results a prototype structure is fabricated and the measured results are compared with those obtained from the simulation.