A Planar Patch Antenna Array Design with Reduced Mutual Coupling Using a Novel Absorber

Moukhtafi, Fadwa El; Aoutoul, Mohssin; Sabri, Khalid; Ahmad, Sarosh; Khoukh, Aziz; Errami, Youssef; Jouali, Redouane; Haddad, Abderrahim; Had, Anas

doi:10.1007/s13369-022-07148-y

Cited by 5 publications

(3 citation statements)

References 24 publications

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“…RFID can communicate over a standard frequency band such as low frequency (125-134 kHz), high frequency (13.56 MHz), ultrahigh frequency (UHF) (840-960 MHz), and microwave frequency (2.45 or 5.8 GHz) [3]. UHF band is used in vehicle management all over the world which varies with countries such as (840-845) MHz (in India), (902-928) MHz (in North America), and (950-955) MHz (in Japan) [4,5].…”

Section: Introductionmentioning

confidence: 99%

Frequency Switchable Global RFID Tag Antennae with Metal Compatibility for Worldwide Vehicle Transportation

Mazumder

Ghosh

Bhattacharya

et al. 2023

Sensors

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This paper presents an effective way to design an RFID tag antenna to operate at three different frequencies by incorporating a switching technique. PIN diode has been used to switch the RF frequency because of its good efficiency and simplicity. The conventional dipole-based RFID tag has been improvised with added co-planar ground and PIN diode. The layout of the antenna is designed with a size of 0.083 λ0 × 0.094 λ0 at UHF (80–960) MHz, where λ0 is the free-space wavelength corresponding to the mid-point of the targeted UHF range. The RFID microchip is connected to the modified ground and dipole structures. Bending and meandering techniques on the dipole length help to match the complex chip impedance with the dipole impedance. Additionally, it scales down the total structure of the antenna. Two PIN diodes are placed along the dipole length at appropriate distances with proper biasing. The ON-OFF switching states of the PIN diodes enable the RFID tag antenna to switch over the frequency ranges (840–845) MHz (India), 902–928 MHz (North America), and 950–955 MHz (Japan).

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Section: Introductionmentioning

confidence: 99%

Frequency Switchable Global RFID Tag Antennae with Metal Compatibility for Worldwide Vehicle Transportation

Mazumder

Ghosh

Bhattacharya

et al. 2023

Sensors

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show abstract

“…The mutual coupling has been increased due the high surface current density induced for adjacent antenna elements which are placed near the excited port [14]. Different mutual coupling mechanism have been discussed in different literature for microwave frequencies to reduce the mutual coupling such as incorporation of complementary rectangular spiral resonator and stub structure at the ground plane [15][16][17], parasitic microstrip line [18], DGS structure [14] and few literature investigated the mutual coupling reduction techniques for mm-wave frequencies as implementing metamaterial polarization-rotator wall [19], metasurface array including circular split ring-shaped cell [20] and incorporating split ring resonator [21].…”

mentioning

confidence: 99%

“…Two complementary rectangular spiral resonators have been designed at the ground plane and a rectangular slot is engraved in between them to couple each other which act as an absorber. This structure effectively reduces mutual coupling between two antenna elements [15]. Two F-shaped stubs at the ground act as reflectors and enhances the isolation between the antenna pairs [16].…”

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confidence: 99%

Design and Characterization of 10-Elements MIMO Antenna With Improved Isolation and Radiation Characteristics for mm-Wave 5G Applications

et al. 2022

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A ten-elements MIMO antenna with improved isolation and reduction of X-polar radiation (XPR) in millimeter (mm) wave region is presented. The individual antenna element consists of stub loaded coplanar waveguide (CPW) structure with elliptical shaped radiator. Defected ground structure (DGS) has been incorporated by engraving partial elliptical shaped slots at the coplanar ground to reduce the mutual coupling effect between the adjacent antenna pairs of the MIMO. The backside of the substrate has a metallic plane with defects which is not connected to the coplanar ground of the antenna. This defected metal structure (DMS) acts as a reflector to improve the radiation characteristics by lowering of XPR as well as improving the co-pol to X-pol isolation. The proposed MIMO structure has a fractional bandwidth of 23.52% (22.5GHz-28.5 GHz) which entails the mm-wave 5G frequency spectrum n258 (24.25-27.5 GHz). The isolation| characteristics of the proposed MIMO antenna are below -35 dB over the operating bandwidth for any pair of adjacent antenna elements which imply significantly improved isolation between the adjacent antenna elements with highly compact layout area of 3.4λ × 8.5λ, where λ is wavelength corresponding to the mid-point of the bandwidth. The inter-element spacing of the MIMO structure is 0.44 λ. The main attractive feature offered by this structure is reduction of XPR in the operating frequency range thus improving the co-pol to X-pol isolation up to 20 dB and 28 dB in the boresight direction in both the XZ and YZ planes respectively. Furthermore, the co-pol to X-pol isolation is maintained above 15 dB almost throughout the elevation angular region -180 o to 180 o thereby negating the hindrance imposed by surface waves in mm-wave region. The diversity performances in terms of Envelope Correlation Coefficient (ECC), Diversity Gain (DG) and Channel Capacity Loss (CCL) are obtained as 0.1 × 10 -6 , 10 dB and 0.005 bps/Hz respectively which are within the acceptable limits. Mean effective gain (MEG) values with respect to the excited port 2 and port 3 is identical and approximately -3dB thus indicating the mean value of these two ports to be almost 1 dB. The multiplexing efficiency of the proposed MIMO antenna is satisfactory over the bandwidth. The group delay is investigated and found to be almost constant with a variation of 1.2 ns thus indicating linear phase characteristic of the antenna. The proposed structure is compared with other mm-wave MIMO antennas and found to be advantageous with respect to the number of antenna elements, compactness, low mutual coupling, co-pol to X-pol isolation, and ECC. A prototype of the proposed 10-elements MIMO is fabricated, and the measured results resemble with the simulated results.INDEX TERMS Mm-wave MIMO, DGS, mutual coupling reduction, co-pol to X-pol isolation, DMS. I. INTRODUCTIONMm-wave MIMO antenna is an essential component for MIMO systems for achieving a complete package of high data stream, multifunctional applications and future generation communication sy...

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A defected substrate 4-element mimo antenna with higher diversity characteristics for 5G sub 6 GHz N77/N78 band applications

Addepalli,

Kumar,

Rani

et al. 2024

Wireless Netw

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A Planar Patch Antenna Array Design with Reduced Mutual Coupling Using a Novel Absorber

Cited by 5 publications

References 24 publications

Frequency Switchable Global RFID Tag Antennae with Metal Compatibility for Worldwide Vehicle Transportation

Frequency Switchable Global RFID Tag Antennae with Metal Compatibility for Worldwide Vehicle Transportation

Design and Characterization of 10-Elements MIMO Antenna With Improved Isolation and Radiation Characteristics for mm-Wave 5G Applications

A defected substrate 4-element mimo antenna with higher diversity characteristics for 5G sub 6 GHz N77/N78 band applications

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