scholarly journals Design of Quad-Port MIMO/Diversity Antenna with Triple-Band Elimination Characteristics for Super-Wideband Applications

Sensors ◽  
2020 ◽  
Vol 20 (3) ◽  
pp. 624 ◽  
Author(s):  
Pawan Kumar ◽  
Shabana Urooj ◽  
Fadwa Alrowais
Keyword(s):  
Coplanar Waveguide ◽  
Ground Plane ◽  
Multiple Input Multiple Output ◽  
Split Ring Resonator ◽  
Impedance Bandwidth ◽  
Antenna Element ◽  
Mimo Antenna ◽  
X Band ◽  
Diversity Antenna ◽  
Triple Band

A compact, low-profile, coplanar waveguide (CPW)-fed quad-port multiple-input–multiple-output (MIMO)/diversity antenna with triple band-notched (Wi-MAX, WLAN, and X-band) characteristics is proposed for super-wideband (SWB) applications. The proposed design contains four similar truncated–semi-elliptical–self-complementary (TSESC) radiating patches, which are excited through tapered CPW feed lines. A complementary slot matching the radiating patch is introduced in the ground plane of the truncated semi-elliptical antenna element to obtain SWB. The designed MIMO/diversity antenna displays a bandwidth ratio of 31:1 and impedance bandwidth (|S11| ≤ − 10 dB) of 1.3–40 GHz. In addition, a complementary split-ring resonator (CSRR) is implanted in the resonating patch to eliminate WLAN (5.5 GHz) and X-band (8.5 GHz) signals from SWB. Further, an L-shaped slit is used to remove Wi-MAX (3.5 GHz) band interferences. The MIMO antenna prototype is fabricated, and a good agreement is achieved between the simulated and experimental outcomes.

scholarly journals DESIGN AND ANALYSIS OF COMPACT METAMATERIAL MIMO ANTENNA FOR WLAN APPLICATIONS

2019 ◽  
Vol 57 (2) ◽  
pp. 223
Author(s):  
Hoa Nguyen Thi Quynh ◽  
Sy Tuan Tran ◽  
Huu Lam Phan ◽  
Duy Tung Phan
Keyword(s):  
Ground Plane ◽  
Multiple Input Multiple Output ◽  
Split Ring Resonator ◽  
Antenna Element ◽  
Mimo Antenna ◽  
Complementary Split Ring Resonator ◽  
Antenna Performance ◽  
Multiple Input ◽  
Input Multiple Output ◽  
The Individual

A compact three-port metamaterial multiple-input-multiple-output (MIMO) antenna using complementary split-ring resonator (CSRR) loaded ground have demonstrated in order to miniaturize the size and improve the antenna performance. The antenna is designed on FR4 material and simulated by HFSS software. By loading CSRRs in the ground plane, the size reduction of 77% of the individual patch antenna element is achieved, which appeared to be the major reason for the obtained the compact MIMO antenna. Furthermore, the simulated results show that the proposed MIMO antenna achieves the total gain higher than 5 dB, the isolation less than -11 dB, the envelope correlation coefficient (ECC) value lower than 0.015, and the bandwidth of 100 MHz through the whole WLAN band from 2.4 GHz to 2.484 GHz, indicating promises for WLAN applications.

scholarly journals 3-D twelve-port multi-service diversity antenna for automotive communications

2022 ◽  
Vol 12 (1) ◽  
Author(s):  
Lekha Kannappan ◽  
Sandeep Kumar Palaniswamy ◽  
Malathi Kanagasabai ◽  
Preetam Kumar ◽  
M. Gulam Nabi Alsath ◽  
...  
Keyword(s):  
Ground Plane ◽  
Multiple Input Multiple Output ◽  
Vertical Plane ◽  
Ultra Wideband ◽  
Diversity Gain ◽  
Antenna Element ◽  
Horizontal Polarization ◽  
Mimo Antenna ◽  
Input Multiple Output ◽  
Diversity Antenna

AbstractThis paper presents a twelve-port ultra-wideband multiple-input-multiple-output (MIMO)/diversity antenna integrated with GSM and Bluetooth bands. The twelve-port antenna is constructed by arranging four elements in the horizontal plane and eight elements in the vertical plane. The antenna element, which is created using a simple rectangular monopole, exhibits a frequency range of 3.1 to 12 GHz. The additional Bluetooth and GSM bands are achieved by introducing stubs into the ground plane. The size of the MIMO antenna is 100 × 100 mm2. The antenna offers polarization diversity, with vertical and horizontal polarization in each plane. The diversity antenna has a bandwidth of 1.7–1.9 GHz, 2.35–2.55 GHz, and 3–12 GHz, the radiation efficiency of 90%, and peak gain of 2.19 dBi. The proposed antenna offers an envelope correlation coefficient of < 0.12, apparent diversity gain of > 9.9 dB, effective diversity gain of > 8.9 dB, mean effective gain of < 1 dB, and channel capacity loss of < 0.35 bits/s/Hz. Also, the MIMO antenna is tested for housing effects in order to determine its suitability for automotive applications.

scholarly journals CSRR Loaded 2x1 Triangular MIMO Antenna for LTE Band Operation

2017 ◽  
Vol 6 (3) ◽  
pp. 78 ◽  
Author(s):  
C. J. Malathi ◽  
D. Thiripurasundari
Keyword(s):  
Patch Antenna ◽  
Ground Plane ◽  
Multiple Input Multiple Output ◽  
Split Ring Resonator ◽  
Antenna System ◽  
Antenna Element ◽  
Single Element ◽  
Mimo Antenna ◽  
Antenna Miniaturization ◽  
Input Multiple Output

A 2´1 (two-element) multiple-input multiple-output (MIMO) patch antenna system is designed and fabricated for (2.43 – 2.57) GHz LTE band 7 operation. It uses comple-mentary split -ring resonator (CSRR) loading on its ground plane for antenna miniaturization. This reduces the single-element antenna size by 76%. The total board size of the proposed MIMO antenna system, including the GND plane is 50´50´0.8mm3, while the single-patch antenna element has a size of 18.5 ´16mm2. The antenna is fabricated and tested. Measured results are in good agreement with simulations. A minimum measured isolation of 10 dB is obtained given the close interelement spacing of 0.17λ.

scholarly journals MIMO­­­-CSRR Antenna for ISM Band Applications

2021 ◽  
Author(s):  
satish kumar ◽  
Gunasekaran Thangavel ◽  
Said Amer Salim Al Ismaili Ismaili ◽  
Balambigai Subramanian
Keyword(s):  
Ground Plane ◽  
Multiple Input Multiple Output ◽  
Split Ring Resonator ◽  
Antenna System ◽  
Antenna Element ◽  
Mimo Antenna ◽  
Ism Band ◽  
Complementary Split Ring Resonator ◽  
Single Antenna ◽  
Input Multiple Output

Abstract For the operation of 2.45GHz ISM band, a 2x2 Multiple Input Multiple Output (MIMO) antenna system is designed and fabricated. Complementary Split Ring Resonator (CSRR) is used in the MIMO patch and loaded on its ground plane to miniaturize the single antenna element. The single patch antenna element of 14x18 mm2 is fixed in a board of the Designed MIMO antennae system measuring 100x50x0.8 mm3. The antenna is tested by measuring radiation pattern, gain, VSWR, mutual coupling and return loss. The results of the Designed antenna systems are in good agreement with the simulations. In comparison to a conventional microstrip antenna, the Designed antenna achieves a 75% reduction in the resonant frequency.

scholarly journals Circularly Polarized Wideband Fabric Stealth Multiple-Input Multiple-Output Antenna for Ultrawideband Applications Useful for Wireless Systems Wearable on Garments

2021 ◽  
Vol 2021 ◽  
pp. 1-16
Author(s):  
Pillalamarri Laxman ◽  
Anuj Jain
Keyword(s):  
Human Body ◽  
Ground Plane ◽  
Multiple Input Multiple Output ◽  
Impedance Bandwidth ◽  
Antenna Element ◽  
Wireless Devices ◽  
Circularly Polarized ◽  
Mimo Antenna ◽  
Multiple Input ◽  
Input Multiple Output

Stealth wearable wireless devices are gaining much attention in the personal security and fashion designing industry. A multiple-input multiple-output wideband circularly polarized antenna wearable on a dress (textile-related), which is immune to bending, is described in this paper, where a wearable on fabric dress application uses the MIMO techniques. It consists of two multiple-input multiple-output types of antenna elements: the resonating elements are created resembling a beautiful peacock shape and the ground plane is appropriately designed. A voltage is applied to each antenna element; the ground plane contains a microstrip transmission line-fed and a rectangular upside-down L-shaped (vertically flipped) strip used for circular polarizing. The antenna covers a 3 dB axial-ratio-band-width (ARBW) value of 5.20–7.10 GHz and impedance bandwidth (S11 less than −10 dB) of 03.60–13.0 GHz. The proposed attachable wearable fabric (textile) multiple-input multiple-output wideband antenna exhibits envelope correlation coefficient (ECC) <0.02, diversity gain (DG) >9.96, channel capacity loss (CCL) <0.2 b/s/Hz, total active reflective coefficient (TARC) <−10 dB, mean effective gain (MEG) ratio within ±0.5 dB. There is dual-sense circular polarization in this antenna and high isolation between resonating elements (higher than 18). A specific absorption rate (SAR) of the proposed antenna for human tissues specimen is also discussed for different situations related to the human body. The overall size of the proposed CP textile MIMO antenna is 34 : 5 × 42 × 1 mm3. Because of its clothing layers (textile), practical performance, and miniature size, the designed MIMO antenna may be helpful for wearable on cloths on human body wireless devices and systems. The proposed antenna can be made unrecognizable because of the beautiful peacock design that can easily mix with the designs of fabric (in the fashion dress). The simulated antenna was fabricated with the help of conventional manual fabrication techniques and tested in real-time situations. The edge-to-edge distance amid the MIMO radiating antennas is 14.2 mm, and the achieved isolation is greater than 18 dB after optimization of the proposed antenna.

Feather-shaped super wideband MIMO antenna

2020 ◽  
pp. 1-9 ◽  
Author(s):  
Sarthak Singhal
Keyword(s):  
Coplanar Waveguide ◽  
Ground Plane ◽  
Multiple Input Multiple Output ◽  
Spatial Diversity ◽  
Antenna Element ◽  
Mimo Antenna ◽  
Multiple Input ◽  
Input Multiple Output ◽  
Operating Bandwidth ◽  
Rectangular Notch

Abstract Two configurations of a modified feather-shaped antenna element are proposed for super wideband (SWB) multiple-input multiple-output (MIMO) applications. The antenna element geometry comprises of a circular slot-loaded feather-shaped radiator and rectangular notch-loaded quarter elliptical coplanar waveguide ground plane. An operating bandwidth of 4.4–51.5 GHz with inter-port isolation, S21 ≥ 15 dB for spatial diversity configuration, and 3.8–51.5 GHz with S21 ≥ 15 dB in pattern diversity configuration are achieved. The footprints of the antenna configurations are 17 × 33 and 31 × 31 mm2. Both configurations exhibited an envelope correlation coefficient of <−20 dB. The proposed MIMO configurations are fabricated and experimentally validated. The designed antenna configurations are SWB and compact.

Miniaturized MIMO Antenna with Complementary Split Ring Resonators Loaded Superstrate for X-band Application

2021 ◽  
Author(s):  
Karthigaiveni S ◽  
R Pandeeswari ◽  
Deivalakshmi S
Keyword(s):  
Frequency Band ◽  
Multiple Input Multiple Output ◽  
Split Ring Resonator ◽  
Ring Resonators ◽  
Impedance Bandwidth ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Mimo Antenna ◽  
Complementary Split Ring Resonator ◽  
X Band

Abstract An aperture coupled two element metamaterial (MTM) antenna suitable for multiple input multiple output (MIMO) applications in the frequency band of 7.525-9.1GHz is proposed. This three-layered structure utilizes a vertical array of rectangular complementary split ring resonators (CSRR) between the contiguously placed circular non-bianisotropic complementary split ring resonator (NBCSRR) radiating elements for enhancement of isolation. This antenna achieves a maximum of 47dB isolation through this MNG structure insertion in the frequency band for 0.11 λ0 separation of the two antenna elements. The proposed antenna achieves a fractional -10dB impedance bandwidth of 18.94% and has a peak gain of 8.15dB. The efficiency of the antenna is 84.14% and the envelope correlation coefficient is less than 0.03 in the operating band. The antenna is low profile with an overall size of 0.85 λ0 x 0.45 λ0 x 0.133 λ0 and is suitable for X-band military applications.

Low-profile, extremely wideband, dual-band-notched MIMO antenna for UWB applications

2019 ◽  
Vol 11 (7) ◽  
pp. 719-728 ◽  
Author(s):  
Ankan Bhattacharya ◽  
Bappadittya Roy ◽  
Rafael F. S. Caldeirinha ◽  
Anup K. Bhattacharjee
Keyword(s):  
Coupling Effect ◽  
Ground Plane ◽  
Multiple Input Multiple Output ◽  
Split Ring Resonator ◽  
Fine Tuning ◽  
Dual Band ◽  
Center Frequency ◽  
Impedance Bandwidth ◽  
Mimo Antenna ◽  
Low Profile

AbstractIn this article, an extremely wideband, isolation-enhanced, low-profile “Multiple-Input-Multiple-Output” (MIMO) antenna along with dual-band-notched features has been investigated. The antenna proposed herein, possesses two mutually orthogonal staircase-etched radiators for achieving a wide bandwidth. The radiating elements are placed mutually perpendicular in order to achieve polarization diversity and high isolation, i.e. for minimization of mutual coupling effect between adjacent radiating elements. The antenna exhibits an extremely wide frequency bandwidth covering 1.2–19.4 GHz except two frequency band notches centered at 3.5 and 5.5 GHz, respectively, originated due to the incorporation of a “Rectangular Complementary Split Ring Resonator (RCSRR)” structure and by etching dual “L-shaped” slits in the ground plane. The center frequency of the notched bands is adjusted by fine tuning of the dimensions of the incorporated band-notching structures. Isolation level (S21) better than −20 dB has been obtained due to the insertion of a “T-shaped” parasitic element as a decoupling structure. A prototype of the proposed antenna having dimension of 20 mm × 20 mm (0.08 λo × 0.08 λo) is fabricated and the antenna responses have been measured. Obtained results show that the miniaturized MIMO diversity antenna is undoubtedly a capable contender for communications supporting an extremely wide impedance bandwidth along with band-notched features for WLAN and WiMAX.

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

2017 ◽  
Vol 10 (3) ◽  
pp. 360-367 ◽  
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.

scholarly journals Minimization of Mutual Coupling Using Neutralization Line Technique for 2.4 GHz Wireless Applications

2015 ◽  
Vol 6 (3) ◽  
pp. 1-15 ◽  
Author(s):  
Wan Noor Najwa Wan Marzudi ◽  
Zuhairiah Zainal Abidin ◽  
Siti Zarina Mohd Muji ◽  
Yue Ma ◽  
Raed A. Abd-Alhameed
Keyword(s):  
Reflection Coefficient ◽  
Mutual Coupling ◽  
Ground Plane ◽  
Multiple Input Multiple Output ◽  
Impedance Bandwidth ◽  
Mimo Antenna ◽  
Mimo Antennas ◽  
Wireless Applications ◽  
Input Multiple Output ◽  
Neutralization Line

This paper presented a planar printed multiple-input-multiple-output (MIMO) antenna with a dimension of 100 x 45 mm2. It composed of two crescent shaped radiators placed symmetrically with respect to the ground plane. Neutralization line applied to suppress mutual coupling. The proposed antenna examined both theoretically and experimentally, which achieves an impedance bandwidth of 18.67% (over 2.04-2.46 GHz) with a reflection coefficient < -10 dB and mutual coupling minimization of < -20 dB. An evaluation of MIMO antennas is presented, with analysis of correlation coefficient, total active reflection coefficient (TARC), capacity loss and channel capacity. These characteristics indicate that the proposed antenna suitable for some wireless applications.

Sign in / Sign up

Export Citation Format

Share Document