Wideband Low-Profile Circularly Polarized Patch Antenna Using 90° Modified Schiffman Phase Shifter and Meandering Microstrip Feed

Qiu, Lei‐Lei; Li, Zhu; Xu, Yanhui

doi:10.1109/tap.2020.2963947

Cited by 26 publications

(18 citation statements)

References 18 publications

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“…Furthermore, the resonance frequencies of the antenna were brought down to lower sub 6 GHz bands by introducing meandered line. 29 The Partial ground plane is employed in the design to suppress the back lobe radiation and reduce the mutual coupling in MIMO. 30 The geometrical parameters such as the pitch of the meander line sections l 4 , width w 6 , and line width w 1 is utilized to calculate the inductance offered by each section of the meandered line modeled as equivalent electrical inductor.…”

Section: Single Element Hybrid Dramentioning

confidence: 99%

Multiband hybrid MIMO DRA for Sub‐6 GHz 5G and WiFi ‐6 applications

Pandey

Upadhyaya

Desai

2022

Int J RF Mic Comp-Aid Eng

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This paper inspects a parasitic element-based inverted meandered U-shaped printed line fed hybrid MIMO DRA. The feed of a single element of the 2-elements hybrid MIMO DRA consists of a meandered shaped line coupled to the inverted L-shaped parasitic element printed on the top side of FR-4 substrate with a partial ground on the back. The rectangular-shaped alumina dielectric is placed over the feed to form the single element hybrid DRA. The individual element resonating at 3.40-4.32 GHz (23.83%) and 4.96-5.05 GHz (1.80%) achieves the dual-band characteristics by exciting multiple modes within the rectangular dielectric resonator. The low-profile Multiple Input-Multiple Output (MIMO) antenna configuration having an overall size of 0.57 λ Â 0.23 λ Â 0.14 λ mm 3 consists of two orthogonally placed hybrid rectangular DRAs. The inter-element isolation for a connected ground MIMO structure is better than 22 dB in the desired bands of operation without using any isolation improvement techniques. The MIMO diversity parameters are simulated and measured to validate the MIMO performance. The diversity metrics envelope correlation coefficient is below .175, and .15, the mean effective gain ratio is 0 dB, the total active reflection coefficient values are below 15 dB, and channel capacity loss values are below 0.5 bits/sec/Hz in the lower, and upper bands of operation which are within the recommended practical limits. The presented MIMO design achieved the peak gain of 12.87dBi, and minimum radiation efficiency of 83%, with stable radiation characteristics that make the antenna suitable for Sub-6 GHz 5G and WiFi-6 applications.

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Section: Single Element Hybrid Dramentioning

confidence: 99%

Multiband hybrid MIMO DRA for Sub‐6 GHz 5G and WiFi ‐6 applications

Pandey

Upadhyaya

Desai

2022

Int J RF Mic Comp-Aid Eng

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“…Unfortunately, it requires an external feeding network, and the structure is complex and large. 2 Conversely, a single-fed antenna is usually simple. However, it has a natural feature of narrow impedance bandwidths (IBWs) and narrow AR bandwidths, 3 which are critical in practice.…”

Section: Introductionmentioning

confidence: 99%

Wideband circularly polarized SIW cavity‐backed patches antenna for wide‐angle scanning phased arrays

Liu,

Fan,

Xing

et al. 2023

Micro & Optical Tech Letters

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A single‐feed wideband circularly polarized (CP) substrate‐integrated waveguide (SIW) cavity‐backed antenna and its phased array are presented in this paper. The proposed element consists of SIW cavity, stacked patches, and a 50‐Ω coaxial probe. The coaxial pin is directly connected to the two patch radiators. By chamfering on each rectangular patch, the proposed SIW cavity‐backed patch antenna realizes wideband circular polarization characteristic. The proposed element exhibits a simulated impedance bandwidth of 22.5% (14–17.6 GHz) for |S11| < −10 dB, an axial‐ratio (AR) bandwidth of 12.9% (14.5–16.5 GHz) for AR ≤ 3 dB. Simulation results illustrate that the infinite array can scanning up to ±60° in all planes over the operating frequency, under the criterion of active VSWR ≤ 3 and AR ≤ 3 dB. For verification purpose, an 8 × 8 array prototype was manufactured and measured. To achieve better CP characteristics, the sequential rotation technique is applied to the full array configuration. The measured results show good agreement with simulation results.

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“…Circularly polarised (CP) antennas are widely used in the radio frequency identification (RFID), satellite communication, global positioning system (GPS), and wireless local area network [28][29][30][31]. To meet the application demands of miniaturised devices and different scenarios in RFID application, a compact CP UHF-band RFID reader antenna with good bandwidth and radiation performance, and low cost is urgently needed [29,30].…”

Section: Introductionmentioning

confidence: 99%

“…To meet the application demands of miniaturised devices and different scenarios in RFID application, a compact CP UHF‐band RFID reader antenna with good bandwidth and radiation performance, and low cost is urgently needed [29, 30]. One wideband CP antenna with a two‐port feeding network was proposed in [31], but it has a high profile and extra feeding circuits. The work in [17, 32] proposed two miniaturised metamaterial‐based CP antennas, respectively.…”

Section: Introductionmentioning

confidence: 99%

Metamaterial‐based, miniaturised circularly polarised antennas for RFID application

Wang

Dong

Itoh

2021

IET Microwaves Antenna & Prop

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Miniaturised circularly polarised (CP) antennas based on dispersion‐engineered metamaterial transmission lines (TLs) are proposed and developed for RFID applications. It is first studied and developed based on the equivalent circuit and dispersion curves of composite right/left‐handed TL (CRLH‐TL), which is featured by a novel/low‐cost double‐layered 3D structure, including metallic screws, one ground layer and metal‐insulator‐metal (MIM) capacitor loaded on the top layer. CP radiation is achieved by two crossed CRLH‐TLs with a microstrip‐slot coupling excitation. One CP antenna and one polarisation reconfigurable antenna, which utilise CRLH‐TLs are then implemented, respectively. Compared with the conventional right‐handed (RH) TL‐based antennas (positive resonance‐based antennas), miniaturisation is achieved by pushing down the dispersion curve to a lower frequency using larger LH capacitance or/and inductance. Negative‐order resonances could be successfully excited by cascading π‐type unit‐cells. It shows similar radiation characteristics and additional size reduction as the positive resonance‐based antennas. This antenna shows an electrical size of 0.24 λ0 × 0.24 λ0 × 0.03 λ0, a −10 dB bandwidth of 4.8%, and a peak gain of 4.2 dBic. It demonstrates advantages in terms of flexible size reduction, low cost, easy manufacturing, and good radiation performance, which are very suitable for 902–928 MHz UHF band RFID application.

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Wideband Low-Profile Circularly Polarized Patch Antenna Using 90° Modified Schiffman Phase Shifter and Meandering Microstrip Feed

Cited by 26 publications

References 18 publications

Multiband hybrid MIMO DRA for Sub‐6 GHz 5G and WiFi ‐6 applications

Multiband hybrid MIMO DRA for Sub‐6 GHz 5G and WiFi ‐6 applications

Wideband circularly polarized SIW cavity‐backed patches antenna for wide‐angle scanning phased arrays

Metamaterial‐based, miniaturised circularly polarised antennas for RFID application

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