scholarly journals Split Ring Resonator-Based Bandstop Filter for Improving Isolation in Compact MIMO Antenna

Sensors ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2256
Author(s):  
Hashinur Islam ◽  
Saumya Das ◽  
Tanweer Ali ◽  
Pradeep Kumar ◽  
Sourav Dhar ◽  
...  
Keyword(s):  
Resonance Frequency ◽  
Ring Resonator ◽  
Multiple Input Multiple Output ◽  
Split Ring Resonator ◽  
Open Circuit ◽  
Split Ring ◽  
Mimo Antenna ◽  
High Isolation ◽  
At Resonance ◽  
Bandstop Filter

The ever-growing expectation for high data rates has led to the introduction of multiple-input multiple-output (MIMO) technologies to wireless connectivity. Such a system requires an MIMO antenna with high isolation. At the same time, the MIMO dimension should not be compromised for achieving high isolation. Thus, isolation techniques that do not allow an increase in dimension need to be fostered for MIMO antenna design. In this paper, a novel low-profile, miniaturized MIMO antenna with high isolation was developed considering a split ring resonator (SRR)-based bandstop filter as a decoupling network. The bandstop filter was designed with a unit cell split ring resonator structure and was deployed between two closely spaced monopole MIMO antenna elements to obtain isolation as high as 39.25 dB at 2.61 GHz. Two open-circuit stub lines were attached with the MIMO feeding network to achieve good impedance matching at resonance frequency. The proposed antenna exhibited a peak gain of 3.8 dBi and radiation efficiency of 84%. It had a low envelop correlation coefficient (ECC < 0.12), high diversity gain (DG > 9.95 dB), low mean effective gain ratio (MEG 1/MEG 2 < 0.05 dB), and low channel capacity loss (CCL < 0.042 bits/s/Hz) at resonance frequency. The overall antenna dimension was restricted to 44 mm ×22 mm (0.38 λ0×0.19 λ0) for its easy integration in compact wireless devices.

scholarly journals A Miniaturized CSRR Loaded 2-Element MIMO Antenna for LTE Band

2021 ◽  
Vol 8 (6) ◽  
pp. 984-988
Author(s):  
Sumit Kumar ◽  
Amruta S. Dixit
Keyword(s):  
Reflection Coefficient ◽  
Ring Resonator ◽  
Multiple Input Multiple Output ◽  
Split Ring Resonator ◽  
Split Ring ◽  
Antenna Size ◽  
Mimo Antenna ◽  
Wireless Applications ◽  
Multiple Input ◽  
Input Multiple Output

A miniaturized 2 x 1 multiple-input multiple-output (MIMO) antenna is presented in this paper. The designed antenna contains two circular patches with Complimentary Split-Ring Resonator (CSRR) that are etched in the ground which has a profound effect on antenna size reduction. It also helps in the reduction of isolation between two antennas. The maximum isolation between the two antennas is -84.62 dB at 2.8 GHz. The size of an antenna becomes more compact i.e., 40 x 20 x 1.6 mm3 after incorporating CSRR. The maximum gain of the designed antenna is 5.8 dBi at 4.3 GHz and the minimum reflection coefficient is -35.15 dB at 1.63 GHz. The operating band of an antenna is wide from 1.3 GHz to 4.3 GHz which covers Bluetooth, WiMax, and LTE applications. The proposed antenna is useful for various wireless applications.

scholarly journals Efficient and Compact Near-Field Coupled Hybrid Antenna Using a Single Radiating Subwavelength Split-Ring Resonator

Electronics ◽  
2019 ◽  
Vol 8 (5) ◽  
pp. 527
Author(s):  
Zinching Dang ◽  
Marco Rahm
Keyword(s):  
Resonance Frequency ◽  
Electromagnetic Waves ◽  
Ring Resonator ◽  
Near Field ◽  
Low Frequency ◽  
Split Ring Resonator ◽  
Dipole Antenna ◽  
Angular Width ◽  
Split Ring ◽  
Broadband Internet

Modern applications in the realms of wireless communication and mobile broadband Internet increase the demand for compact antennas with well defined directivity. Here, we present an approach for the design and implementation of hybrid antennas consisting of a classic feeding antenna that is near-field-coupled to a subwavelength resonator. In such a combined structure, the composite antenna always radiates at the resonance frequency of the subwavelength oscillator as well as at the resonance frequency of the feeding antenna. While the classic antenna serves as impedance-matched feeding element, the subwavelength resonator induces an additional resonance to the composite antenna. In general, these near-field coupled structures are known for decades and are lately published as near-field resonant parasitic antennas. We describe an antenna design consisting of a high-frequency electric dipole antenna at f d = 25 GHz that couples to a low-frequency subwavelength split-ring resonator, which emits electromagnetic waves at f SRR = 10.41 GHz. The radiating part of the antenna has a size of approximately 3.2 mm × 8 mm × 1 mm and thus is electrically small at this frequency with a product k · a = 0.5 . The input return loss of the antenna was moderate at − 18 dB and it radiated at a spectral bandwidth of 120 MHz. The measured main lobe of the antenna was observed at 60 ∘ with a − 3 dB angular width of 65 ∘ in the E-plane and at 130 ∘ with a − 3 dB angular width of 145 ∘ in the H-plane.

scholarly journals Effect of rotational split ring resonator on dual bandstop filter

2019 ◽  
Vol 32 ◽  
pp. 681-686
Author(s):  
Mohssine El Ouahabi ◽  
Alia Zakriti ◽  
Mohamed Essaaidi ◽  
Aziz Dkiouak
Keyword(s):  
Ring Resonator ◽  
Split Ring Resonator ◽  
Split Ring ◽  
Bandstop Filter

scholarly journals Design of a MIMO Antenna with Improved Isolation Using MNG Metamaterial

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Youngki Lee ◽  
Deukhyeon Ga ◽  
Jaehoon Choi
Keyword(s):  
Correlation Coefficient ◽  
Return Loss ◽  
Ring Resonator ◽  
Split Ring Resonator ◽  
Impedance Bandwidth ◽  
Negative Permeability ◽  
Split Ring ◽  
Mimo Antenna ◽  
Term Evolution

A multi-input multi-output (MIMO) antenna with improved isolation using an interdigital split ring resonator (SRR) is proposed. The necessary impedance bandwidth is obtained by utilizing the coupling between the meander strip and an invertedLstrip. Using interdigital SRR, a negative permeability was generated, while achieving improved isolation between the two radiating elements. The fabricated antenna satisfies the 10 dB return loss in the long-term evolution (LTE) band 40 from 2.3 GHz to 2.4 GHz. The measured peak gains of the two elements were 2.0 dBi and 1.3 dBi. The measured envelope correlation coefficient was less than 0.16 over the frequency band of interest.

scholarly journals Perancangan dan Implementasi Duplexer Mikrostrip untuk Frekuensi LTE pada band ke-7

2013 ◽  
Vol 1 (2) ◽  
pp. 68
Author(s):  
ENCENG SULAEMAN ◽  
ARSYAD RAMADHAN DARLIS ◽  
HARIANTI ASRI DEWI
Keyword(s):  
Ring Resonator ◽  
Split Ring Resonator ◽  
Long Term Evolution ◽  
Frequency Division ◽  
Split Ring ◽  
Term Evolution ◽  
Base Transceiver Station ◽  
Hybrid Coupler ◽  
Bandstop Filter

ABSTRAKKebutuhan akan komunikasi bergerak semakin mengalami peningkatan dalam dunia teknologi yang ada saat ini, maka hadirlah teknologi terbaru yaitu Long Term Evolution (LTE). Dengan teknik duplex jenis Frequency Division Duplex (FDD), dirancanglah duplexer yang mampu melakukan proses pengiriman dan penerimaan dalam satu waktu dengan frekuensi yang berbeda antara uplink dan downlink. Pada penelitian ini dirancang dan diimplementasikan sebuah duplekser dengan menggunakan metoda Hybrid Coupler dan Bandstop Filter berbasis Split Ring Resonator untuk band frekuensi ke-7 pada teknologi LTE di sisi Base Transceiver Station (BTS). Duplekser dibuat dengan menggabungkan dua buah hybrid Coupler dan dua buah Bandstop Filter. Hasil pengukuran duplexer saat port Tx mengirimkan sinyal ke antena dengan nilai redaman pada frekuensi tengah downlink sebesar 3.168 dB. Lalu pada saat antena menerima sinyal untuk diteruskan ke Rx terdapat redaman di frekuensi tengah uplink sebesar 6 dB. Sedangkan untuk isolasi dari port Tx-port Rx dihasilkan sebesar 15 dB.Kata kunci: Duplexer, Bandstop Filter, Split Ring Resonator, Hybrid Coupler, dan Long Term Evolution.ABSTRACTThe necessary of mobile communication has increased in technology, now it released the new of technology is Long Term Evolution (LTE). Type of duplex is Frequency Division Duplex (FDD), designed a duplexer which it is capable for transmitting and receiving process at the same time with the different of frequency between uplink and downlink. Research of designed and implemented a duplexer using Hybrid Coupler and Bandstop filters based on Split Ring Resonators for the frequency band 7th on LTE technology at Base Transceiver Station (BTS). Duplexer is made by combining two coupler and two bandstop filter. The results of duplexer measurements, when Tx port transmit the signal to antenna port with attenuation at the downlink frequency center at 3.168 dB. Attenuation from antenna port to Rx port about 6 dB. Isolation between Tx port and Rx port about 15 dB.Keywords: Duplexer, Bandstop Filter, Split Ring Resonator, Hybrid Coupler, and Long Term Evolution.

Design of Microstrip Bandstop Filter using Split Ring Resonator with Inter Digital

2017 ◽  
Vol 5 (4) ◽  
pp. 1 ◽  
Author(s):  
Mishra Anuj Kumar ◽  
Pandey Arvind Kumar ◽  
Chauhan R.K. ◽  
◽  
◽  
...  
Keyword(s):  
Ring Resonator ◽  
Split Ring Resonator ◽  
Split Ring ◽  
Bandstop Filter
Sign in / Sign up

Export Citation Format

Share Document