Small-Size and High-Isolation MIMO Antenna for WLAN

Seo

2014

For this study, we designed an implantable rectangular spiral antenna for medical biotelemetry in the Medical Implant Communications Service band (402 MHz to 405 MHz). The designed antenna has a U-shaped loop for impedance matching. The antenna impedance is easily adjusted by controlling the shape and length of the Ushaped loop. Significant design parameters were studied to understand their effects on the antenna performance. To verify the potential of the antenna for the desired applications, we fabricated a prototype and measured its performance in terms of the resonant characteristics and gain radiation patterns of the antenna. In the testing phase, the prototype antenna was embedded in human skin tissue-emulating gel, which was developed to simulate a real operation environment. The measured resonant characteristics show good agreement with the simulations, and the -10 dB frequency band is within the range of 398 MHz to 420 MHz. The antenna exhibits a maximum gain of -22.26 dBi and an antenna efficiency of 0.215%.

Section: Introductionmentioning

confidence: 99%

Design of Implantable Rectangular Spiral Antenna for Wireless Biotelemetry in the MICS Band

Seo

2014

“…Figure 3(a) shows the measured return losses of the proposed antenna for case 1. The isolation is much improved when a short-circuit strip with [16]. The return losses are greater than 10 dB from 2.35 GHz to 2.6 GHz and from 5.1 GHz to 5.3 GHz.…”

Section: Measured and Simulated Resultsmentioning

confidence: 97%

Design of Dual-Band MIMO Antenna with High Isolation for WLAN Mobile Terminal

Lee¹,

Lee²,

Park³

et al. 2013

In this paper, we propose a dual-band multiple-input multiple-output (MIMO) antenna with high isolation for WLAN applications (2.45 GHz and 5.2 GHz). The proposed antenna is composed of a mobile communication terminal board, eight radiators, a coaxial feed line, and slots for isolation. The measured-10 dB impedance bandwidths are 10.1% (2.35 GHz to 2.6 GHz) and 3.85% (5.1 GHz to 5.3 GHz) at each frequency band. The proposed four-element MIMO antenna has an isolation of better than 35 dB at 2.45 GHz and 45 dB at 5.2 GHz between each element. The antenna gain is 3.2 dBi at 2.45 GHz and 4.2 dBi at 5.2 GHz.

“…It is difficult to integrate other elements inside the mobile terminal because the electronic band gap bores several holes into the ground plane [10]- [12]. The isolation is much improved when a short-circuit strip with [16]. However, the mobile terminal is affected manually.…”

Section: Measured and Simulated Resultsmentioning

confidence: 99%

Design of Dual-Band MIMO Antenna with High Isolation for WLAN Mobile Terminal

Lee¹

2013

In this paper, we propose a dual-band multiple-input multiple-output (MIMO) antenna with high isolation for WLAN applications (2.45 GHz and 5.2 GHz). The proposed antenna is composed of a mobile communication terminal board, eight radiators, a coaxial feed line, and slots for isolation. The measured -10 dB impedance bandwidths are 10.1% (2.35 GHz to 2.6 GHz) and 3.85% (5.1 GHz to 5.3 GHz) at each frequency band. The proposed four-element MIMO antenna has an isolation of better than 35 dB at 2.45 GHz and 45 dB at 5.2 GHz between each element. The antenna gain is 3.2 dBi at 2.45 GHz and 4.2 dBi at 5.2 GHz.