Bandwidth and Gain Enhancement of MIMO Antenna by using Ring and Circular Parasitic with Air-Gap Microstrip Structure

Teguh Firmansyah, Herudin Herudin, Suhendar Suhendar, Romi Wiryadinata, M Iman Santoso, Yus Rama Denny, Toto Supriyanto


This research was proposed a circular patch MIMO antenna by using a ring and circular parasitic radiator structure. As a novelty, in order to enhance bandwidth and gain of circular patch MIMO antenna, a conventional circular patch MIMO antenna will be added a ring and a circular parasitic. Therefore, this research was investigated a conventional MIMO antenna (C-MA), ring parasitic MIMO antenna (RP-MA), and circular parasitic MIMO antenna (CP-MA) as Model 1, Model 2, and Model 3, respectively. This MIMO antenna was designed on FR4 microstrip substrate with er= 4.4, thickness h=1.6 mm, and tan d= 0.0265. This MIMO antenna has center frequency 2.35 GHz which is a frequency band for LTE application in Indonesia. An Advance Design System (ADS) software was used to determine the antenna parameters. The MIMO antenna C-MA / RP-MA/ CP-MA achieves 2.36GHz/ 2.38GHz/ 2.38 GHz, 70 MHz/ 100 MHz/ 120 MHz, 1.625 dBi/ 4.066 dBi/ 4.117 dBi, 6.414 dBi/ 7.26 dBi/ 7.153 dBi, 33.9 %/ 47.8 %/ 49.70 %, -12.35 dB/ -22.21 dB/ -23.66 dB, and -30.924 dB/ -28.46 dB/ -27.59 dB for center frequency, bandwidth, gain, directivity, efficiency, reflection coefficient, and mutual coupling, respectively. Compared to C-MA (Model1) performances, The result showed that proposed antenna has wider-bandwidth/ higher-gain with 42.8%/ 150.2 %, and 71.4%/ 163.3% for RP-MA (Model 2) and CP-MA (Model 3), respectively. The proposed antenna has size of 50 mm x 130 mm x 23.2 mm. Measured results are in a good agreement with the simulated results.


Antenna; MIMO; ring parasitic; circular parasitic

Full Text:



Abdulrahman S, Mohd J, Ping S, Guy A, Vandenbosch E. Assessment of PDMS Technology in a MIMO Antenna Array. IEEE Antennas and Wireless Propagation Letters. 2016; 15 (1): 1939-1942.

Ping-Heng K. A glance at FD-MIMO technologies for LTE. IEEE Wireless Communications. 2016; 23(1): 2-5.

Thomas L, Peter T, Frank M. Evaluation and optimization of LTE MIMO antenna configurations in automotive environment. The 8th European Conference on Antennas and Propagation (EuCAP). 2014: 1100-1104.

B. Mun, C. Jung, M. J. Park and B. Lee. A Compact Frequency-Reconfigurable Multiband LTE MIMO Antenna for Laptop Applications. IEEE Antennas and Wireless Propagation Letters. 2014; 13: 1389-1392.

Byeonggwi M, Changwon J, Myun-Joo P, Byungje L. A Compact Frequency-Reconfigurable Multiband LTE MIMO Antenna for Laptop Applications. IEEE Antennas and Wireless Propagation Letters. 2014; 13: 1389-1392.

Subuh P, Tommi H, Budi S. Performance of Groundplane Shaping in Four-Element Dualband MIMO Antenna. TELKOMNIKA. 2017; 15(1): 220-226.

Yuli Kurnia N, Rastanto H. Low Mutual Coupling Dualband MIMO Microstrip Antenna Parasitic with Air Gap. TELKOMNIKA. 2014; 12(2): 405-410.

Leeladhar M, Rajib K, Machavaram V, Kartikeyan. A 2 × 2 Dual-Band MIMO Antenna with Polarization Diversity for Wireless Applications. Progress In Electromagnetics Research C. 2016; 61: 91-103.

Masoumeh D, Hamid H. Multiband Uniplanar Monopole Antenna for MIMO Applications. 20th Iranian Conferance on Electrical Engineering (ICEE). Tehran. 2012: 15-17.

Patil V,P. Enhancement of Bandwidth of Rectangular Patch Antenna Using Two Square Slots Techniques. International Journal of Engineering Sciences & Emerging Technologies. 2012; 3(2): 1-12.

R.Halappa R, C.N.Anoop. The Study on Bandwidth Enhancement of Rectangular Microstrip Patch Antenna (RMPA) for Wireless Application. International Journal of Electronics & Communication Technology. 2011; 2(4): 171-174.

S. Arun K, K.Sunil, D. K. Srivastava. Design and Bandwidth Enhancement of Rectangular Microstrip Patch Antenna using Double H-Slot Technique for Broadband Applications. International Journal of Advanced Research in Computer and Communication Engineering. 2013; 2(12): 4570-4574.

T. Abdurrahim. G-shaped band-notched ultra-wideband MIMO antenna system for mobile terminals. IET Microwaves, Antennas & Propagation. 2017; 11(5) : 718-725.

A, Raja Abdullah. D, Yoharaaj. I, Alyani. Bandwidth Enhancement Technique in Microstrip Antenna for Wireless Applications. PIERS ONLINE. 2006; 2(6): 633-639.

T, Yingying. Y, Liping. Z, Xiang. L, Changjun. H. Kama. Bandwidth Enhancement of a Printed Slot Antenna with a Diamond-Shaped Tuning Stub. Progress In Electromagnetics Research C. 2014; 50: 87-93.

B, Alexander. S, Daniel. Gridded Parasitic Patch Stacked Microstrip Antenna with Beam Shift Capability for 60GHz Band. Progress In Electromagnetics Research B. 2015; 62: 319–331.

P, Seungbae. K, Cheolbok Kim. J, Youngho. L, Hosang. C, Dongki. L, Munsoo. Gain enhancement of a microstrip patch antenna using a circularly periodic EBG structure and air layer. AEU - International Journal of Electronics and Communications. 2010; 64(7): 607–613.

T, Balakumaran. D, Sasidharan. Design of Microstrip Patch Antenna Array using Parasitic Coupling. National Conference on Information and Communication Technologies (NCICT). 2015: 30-35.

P, Paritaba. M, Balvant. J, Mehul. Bandwidth Enhancement of Microstrip Patch Antenna Using Parasitic Patch Configuration. International Conference on Communication Systems and Network Technologies. 2012 : 53-57.

A, Ramachandran. Puthiyapurayil. V, Vinesh. Collocated MIMO Antenna with Reduced Mutual Coupling Using Square Ring DGS. Progress In Electromagnetics Research C. 2014; 53 119-125.

M, Mohammad Naser.,,. Compact EBG Structures for Reduction of Mutual Coupling in Patch Antenna MIMO Arrays. Progress In Electromagnetics Research C. 2014; 53: 145–154.

T, Pramendra. P, Sharma. T, Bandopadhyay. Gain Enhancement of Circular Microstrip Antenna for Personal Communication Systems. International Journal of Engineering and Technology. 2011; 3(2): 175-178.

W, Gunawan. et al. Design of triple-band bandpass filter using cascade tri-section stepped impedance resonators. Journal of ICT Research and Applications. 2016; 10: 43-56.

W. Gunawan, et al. Multiband bandpass filter (BPF) based on folded dual crossed open stubs. International Journal of Technology. 2014; 5: 32-39.

F. Teguh, et al. Multiband RF low noise amplifier (LNA) base on multi section impedance transformer for multi frequency application. International Journal of Applied Engineering Research. 2016; 11: 3478-3483.

K, Saidulu. et al. Performance Analysis of Circular Microstrip Patch Antenna With Dielectric Superstrates. IOSR Journal of Engineering. 2013; 3(9): 39-51.



  • There are currently no refbacks.

Copyright (c) 2017 Universitas Ahmad Dahlan

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

TELKOMNIKA Telecommunication, Computing, Electronics and Control
online system:
Phone: +62 (274) 563515, 511830, 379418, 371120 ext: 3208
Fax    : +62 (274) 564604