A COMPACT FOUR-PORT HIGH ISOLATION HOOK SHAPED ACS FED MIMO ANTENNA FOR DUAL FREQUENCY BAND APPLICATIONS

The wireless system capacity can be increased by the use of multiple antennas at transmitting and receiving side. The technology which uses multiple antennas called multiple inputs multiple outputs used to fulfils the demand of higher bit rate. In this paper two element antennas has designed using MIMO technique for dual band application and produced better isolation characteristics. In the proposed structure the high isolation was achieved using triangular and hexagonal cut structure. The presented simulated result produced low value of ECC and optimum value of VSWR in the given frequency band. The value of S12 is found less than -18 dB. The value of ECC is obtained 0.015 at 5.3 GHz. The proposed antenna operates in two frequency applications which are 3.59 GHz and 5.3 GHz.

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A Design of Double Broadband MIMO Antenna

International Journal of Antennas and Propagation ◽

10.1155/2015/952137 ◽

2015 ◽

Vol 2015 ◽

pp. 1-6 ◽

Cited By ~ 1

Author(s):

Yanfeng Geng ◽

Runbo Ma ◽

Baoming Chen ◽

Wenmei Zhang

Keyword(s):

Frequency Band ◽

Wave Energy ◽

Mimo System ◽

Low Frequency ◽

Mobile System ◽

Mimo Antenna ◽

High Isolation ◽

Antenna Performance ◽

Communication Frequency ◽

Technical Measures

The MIMO antenna applied to LTE mobile system should be miniaturization and can work in the current communication frequency band; isolation between each antenna unit also should be good so as to reduce loss of radio wave energy and improve the antenna performance of the MIMO system. This paper puts forward the design scheme of a broadband MIMO double antenna. And the design of antenna unit and debugging and related technical measures, such as bending antenna bracket, are both presented; the integration design of high isolation of ultra broadband MIMO antenna is realized on the plate with the volume of 100 × 52 × 0.8 mm3; antenna working bands are 698 MHz~960 MHz and 1710 MHz~2700 MHz; in the whole spectrum, the 10 dB of port isolation can be basically achieved; in low frequency band, the isolation degree of antenna port can reach 12 dB.

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High-Isolation UWB MIMO Antenna with Multiple X-Shaped Stubs Loaded between Ground Planes

International Journal of Antennas and Propagation ◽

10.1155/2021/1155471 ◽

2021 ◽

Vol 2021 ◽

pp. 1-13

Author(s):

Minghuan Wang ◽

Jingchang Nan ◽

Jing Liu

Keyword(s):

Frequency Band ◽

Impedance Matching ◽

Ground Plane ◽

Multiple Input Multiple Output ◽

Dielectric Substrate ◽

Ultra Wideband ◽

Antenna Structure ◽

Mimo Antenna ◽

High Isolation ◽

Input Multiple Output

A miniaturized ultra-wideband multiple-input multiple-output (UWB MIMO) two-port antenna with high isolation based on FR4 is designed in this article. The size of the antenna is only 18 × 28 × 1.6 mm3. The MIMO antenna consists of two identical antenna elements symmetrically placed on the same dielectric substrate in opposite directions. By loading three crossed X-shaped stubs between two unconnected ground planes, high isolation and good impedance matching are achieved. The working frequency band measured by this UWB MIMO antenna is 1.9–14 GHz, and the isolation is kept above 20.2 dB in the whole analysis frequency band. Good radiation characteristics as well as envelope correlation coefficient (ECC, <0.09), mean effective gain (MEG), and channel capacity loss (CCL) in the passband meet the requirements of the application, which can be applied to the UWB wireless communication system. To verify the applicability of the proposed method for enhancing the isolation between antenna elements, the two-port antenna structure was extended to a four-port antenna structure. In the case of loading the X-shaped stubs to connect to the ground plane, the isolation of the antenna is maintained above 15.5 dB within 1.7–14 GHz.

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Swastika shaped slot embedded two port dual frequency band MIMO antenna for wireless applications

Analog Integrated Circuits and Signal Processing ◽

10.1007/s10470-021-01923-x ◽

2021 ◽

Author(s):

Rakesh N. Tiwari ◽

Prabhakar Singh ◽

Shivam Pandey ◽

Ritika Anand ◽

Dinesh Kumar Singh ◽

...

Keyword(s):

Frequency Band ◽

Dual Frequency ◽

Mimo Antenna ◽

Wireless Applications

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A Novel Metamaterial MIMO Antenna with High Isolation for WLAN Applications

International Journal of Antennas and Propagation ◽

10.1155/2015/851904 ◽

2015 ◽

Vol 2015 ◽

pp. 1-9 ◽

Cited By ~ 11

Author(s):

Nguyen Khac Kiem ◽

Huynh Nguyen Bao Phuong ◽

Quang Ngoc Hieu ◽

Dao Ngoc Chien

Keyword(s):

Frequency Band ◽

Surface Current ◽

Defected Ground Structure ◽

Mimo Antenna ◽

High Isolation ◽

Left Handed ◽

Metamaterial Antenna ◽

Final Design ◽

Edge Separation ◽

Effect Of Surface

A compact2×2metamaterial-MIMO antenna for WLAN applications is presented in this paper. The MIMO antenna is designed by placing side by side two single metamaterial antennas which are constructed based on the modified composite right/left-handed (CRLH) model. By adding another left-handed inductor, the total left-handed inductor of the modified CRLH model is increased remarkably in comparison with that of conventional CRLH model. As a result, the proposed metamaterial antenna achieves 60% size reduction in comparison with the unloaded antenna. The MIMO antenna is electrically small (30 mm × 44 mm) with an edge-to-edge separation between two antennas of0.06λ0at 2.4 GHz. In order to reduce the mutual coupling of the antenna, a defected ground structure (DGS) is inserted to suppress the effect of surface current between elements of the proposed antenna. The final design of the MIMO antenna satisfies the return loss requirement of less than −10 dB in a bandwidth ranging from 2.38 GHz to 2.5 GHz, which entirely covers WLAN frequency band allocated from 2.4 GHz to 2.48 GHz. The antenna also shows a high isolation coefficient which is less than −35 dB over the operating frequency band. A good agreement between simulation and measurement is shown in this context.

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A Graphene-Assembled Film Based MIMO Antenna Array with High Isolation for 5G Wireless Communication

Applied Sciences ◽

10.3390/app11052382 ◽

2021 ◽

Vol 11 (5) ◽

pp. 2382

Author(s):

Rongguo Song ◽

Xiaoxiao Chen ◽

Shaoqiu Jiang ◽

Zelong Hu ◽

Tianye Liu ◽

...

Keyword(s):

Antenna Array ◽

Antenna Arrays ◽

Multiple Input Multiple Output ◽

Frequency Selective Surface ◽

Antenna System ◽

Antenna Element ◽

Mimo Antenna ◽

High Isolation ◽

Input Multiple Output ◽

Alternative Material

With the development of 5G, Internet of Things, and smart home technologies, miniaturized and compact multi-antenna systems and multiple-input multiple-output (MIMO) antenna arrays have attracted increasing attention. Reducing the coupling between antenna elements is essential to improving the performance of such MIMO antenna system. In this work, we proposed a graphene-assembled, as an alternative material rather than metal, film-based MIMO antenna array with high isolation for 5G application. The isolation of the antenna element is improved by a graphene assembly film (GAF) frequency selective surface and isolation strip. It is shown that the GAF antenna element operated at 3.5 GHz has the realized gain of 2.87 dBi. The addition of the decoupling structure improves the isolation of the MIMO antenna array to more than 10 dB and corrects the antenna radiation pattern and operating frequency. The isolation between antenna elements with an interval of 0.4λ is above 25 dB. All experimental results show that the GAF antenna and decoupling structure are efficient devices for 5G mobile communication.

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