A Compact Ultra-Wideband (UWB) MIMO Antenna for K and Ka Band Applications

Abstract This study presents a novel configuration of a cuboidal quad-port ultra-wideband multiple-input and multiple-output antenna with WLAN rejection characteristics. The designed antenna consists of four F-shaped elements backed by a partial ground plane. A 50 Ω microstrip line is used to feed the proposed structure. The geometry of the suggested antenna exhibits an overall size of 23 × 23 × 19 mm3, and the antenna produces an operational bandwidth of 7.6 GHz (3.1–10.7 GHz). The notched band characteristic at 5.4 GHz is accomplished by loading a pair of spiral electromagnetic bandgap structures over the ground plane. Besides this, other diversity features such as envelope correlation coefficient, and diversity gain are also evaluated. Furthermore, the proposed antenna system provides an isolation of −15 dB without using any decoupling structure. Therefore, to validate the reported design, a prototype is fabricated and characterized. The overall simulated performance is observed in very close agreement with it's measured counterpart.

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Ultra-Wideband MIMO Antenna with Double Notched Band

2020 Cross Strait Radio Science & Wireless Technology Conference (CSRSWTC) ◽

10.1109/csrswtc50769.2020.9372601 ◽

2020 ◽

Author(s):

Xuefeng Wang ◽

Yufa Sun

Keyword(s):

Ultra Wideband ◽

Mimo Antenna ◽

Notched Band

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A compact dual port UWB-MIMO/diversity antenna for indoor application

International Journal of Microwave and Wireless Technologies ◽

10.1017/s1759078717001283 ◽

2017 ◽

Vol 10 (3) ◽

pp. 360-367 ◽

Cited By ~ 4

Author(s):

Sonika Priyadarsini Biswal ◽

Sushrut Das

Keyword(s):

Mimo System ◽

Ground Plane ◽

Multiple Input Multiple Output ◽

Open Circuit ◽

Ultra Wideband ◽

Impedance Bandwidth ◽

Good Prospect ◽

Mimo Antenna ◽

Radiating Element ◽

Input Multiple Output

A compact printed quadrant shaped monopole antenna is introduced in this paper as a good prospect for ultra wideband- multiple-input multiple-output (UWB-MIMO) system. The proposed MIMO antenna comprises two perpendicularly oriented monopoles to employ polarization diversity. An open circuit folded stub is extended from the ground plane of each radiating element to enhance the impedance bandwidth satisfying the UWB criteria. Two ‘L’ shaped slots are further etched on the radiator to provide good isolation performance between two radiators. The desirable radiator performances and diversity performances are ensured by simulation and/or measurement of the reflection coefficient, radiation pattern, realized peak gain, envelope correlation coefficient (ECC), diversity gain, mean effective gain (MEG) ratio and channel capacity loss (CCL). Results indicate that the proposed antenna exhibits 2.9–11 GHz 10 dB return loss bandwidth, mutual coupling <−20 dB, ECC < 0.003, MEG ratio ≈ 1, and CCL < 0.038 Bpsec/Hz, making it a good candidate for UWB and MIMO diversity application.

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Design of an interlocked four-port MIMO antenna for UWB automotive communications

International Journal of Microwave and Wireless Technologies ◽

10.1017/s1759078721000374 ◽

2021 ◽

pp. 1-8

Author(s):

M. Saravanan ◽

R. Kalidoss ◽

B. Partibane ◽

K. S. Vishvaksenan

Keyword(s):

Multiple Input Multiple Output ◽

Performance Estimation ◽

Ultra Wideband ◽

Antenna Element ◽

Frequency Range ◽

Mimo Antenna ◽

Multiple Input ◽

Input Multiple Output ◽

Operating Bandwidth ◽

Peak Gain

Abstract The design, analysis, fabrication, and testing of a four-port multiple-input multiple-output (MIMO) antenna is reported in this paper for automotive communications. The MIMO antenna is constructed using the basic antenna element exploiting a slot geometry. Two such antennas are developed on the same microwave laminate to develop a two-port MIMO antenna. Two such microwave laminates are interlocked to create the four-port MIMO scheme. The most distinct feature of the proposed architecture is that the inter-port isolation is well-taken care without the need for an external decoupling unit. The four-port MIMO antenna has an overall volume of 32 × 15 × 32 mm3. The prototype MIMO antenna is fabricated and the measurements are carried out to validate the simulation results. The antenna offers ultra-wideband (UWB) characteristics covering the frequency range of 2.8–9.5 GHz. The average boresight gain of the antenna ranges from 3.2 to 5.41 dBi with the peak gain at 8 GHz. The simulated efficiency of the antenna is greater than 73% within the operating bandwidth. The MIMO parameters such as envelope correlation coefficient, diversity gain, and mean effective gain are evaluated and presented. The appropriateness of the proposed antenna for deployment in the shark fin housing of the present-day automobiles is verified using on-car performance estimation.

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