A metasurface (MS) used to convert the linearly polarized (LP) signal from a source antenna into circularly (CP) is proposed and studied. The MS consists of 16 unit cells arranged in 4 × layout. Each cell rectangular loop with diagonal microstrip. By placing close antenna, converts LP generated CP signal. Two antennas (patch slot antennas) are for studies. together here called antenna. total four low-profile operating at frequency about 2.45 GHz designed using computer simulation. For...

The rapid development of modern communication systems propels the demand high performance and miniaturization RF/microwave components. Power dividers filters are indispensable circuit components in amplifiers antenna feed-networks which occupy large footprint broads, particularly at low frequency. purpose this study is to initiate a new type planar transmission line with unique dual signal-path characteristics ultimately achieve miniaturization. In paper, novel technique consolidating...

A dual circularly polarized (CP) magnetoelectric dipole antenna is presented in this article. The dual-CP was devised to form a circular ring shape and fabricated using 3-D printing technology. To overcome the conflict between high (broadside) gain wide (half-power) beamwidth, new beamwidth broadening technique proposed. Twelve metacolumns were placed evenly along circumference close ring-shaped dipole. design approach elaborated, where number size of meta-columns decided according curves....

In this communication, a dual-polarized filtering magneto-electric dipole (FMED) antenna and arrays are proposed for 5G n258 (24.25–27.5 GHz) operations. The FMED was devised to incorporate mechanisms using built-in substrate integrated waveguide (SIW)-based filter plus slot-and-notch etching on the element. As such, lower upper radiation cutoffs nulls were produced tuned, independently. To overcome problem of "high selectivity" that has not been correctly quantified thus no comparison, new...

By coupling a stub-loaded open-loop resonator onto the back of CPW-fed mirrored-L monopole, novel triple-band planar antenna has been achieved and is presented. The proposed features compact structure with reasonable gains. measured bandwidths for distinct are 2.27–2.87 GHz, 3.4–4.15 GHz 5.11–6.7 GHz. Omnidirectional radiation patterns three bands observed. Simulations confirmed by experimental results, which ensure that well suited WiFi WiMAX applications.

A wideband H-shaped patch antenna for circular polarization is described. By incorporating a long probe inside substantial high cavity (~ 0.26λ), circularly polarized (CP) in broadside direction achieved. The horizontal arm of the implemented by means printed monopole that diagonally coupled to small copper plate. CP features wide operational bandwidth 19.4%. maximum gain and efficiency this are recorded as >5 dBic >80%, respectively, across bandwidth. dimension 0.3λ × whereas ground plane...

A substrate integrated magneto-electric (ME) dipole antenna with metasurface is proposed for the 5G/WiMAX/WLAN/X-band MIMO applications. In order to provide a low profile, radiated electric dipoles shorted wall are used in multi-layer substrates at different heights. Owing coordination of and ME dipole, dual wideband high gain have been obtained. As result 3-D hexagonal structure, good envelope correlation coefficient mean effective performance can be achieved by system. The element an...

This contribution presents a novel 3-D circular conformal MIMO antenna system composed of three magneto-electric dipoles (MED) antennas. The single MED element was delicately designed to include one main (lower-band) dipole and two auxiliaries (upper-band) in order achieve the dual-band radiation. proposed owns low-profile geometry but features wide H-plane beamwidth (minimum 103°). By embedding metamaterial broadside-coupled E-shaped unit cells into magnetic dipole, height can be...

A compact wideband circularly polarized (CP) magneto-electric (ME) dipole antenna array is proposed. In order to achieve size and characteristics, a novel substrate integrated waveguide (SIW) coaxial transition (SCT) was designed connect the lightning-shaped ME-dipole element an SIW feeding network. Particularly, SCT-based power divider network together with sequential-rotation (SR) technique employed improve axial ratio (AR) bandwidth of 4×4 array. The prototype fabricated verify design....

This letter proposes a novel simple planar circularly polarized (CP) frequency beam-scanning (FBS) antenna using slotline (SL) and spoof surface plasmon polariton (SSPP) structure. A new SL-SSPP slow-wave transmission line (TL) is initiated by periodically introducing orthogonal tilted corrugated grooves on both sides of the SL, which can generate electric-field components in same cross-section along TL, its dispersion characteristic be flexibly adjusted. In order to excite an effective...

We present a systematic, empirical design technique to obtain optimum broadband impedance, axial-ratio (AR) and gain bandwidths for singly-fed electromagnetically coupled patch antenna circular polarization. Our investigation has also revealed tradeoffs amongst obtainable AR, impedance bandwidth AR bandwidth. Using two examples at different frequency bands senses of polarization, we have demonstrated the effectiveness proposed knowledge-based tuning method. obtained C-band measured values...

This communication presents a 2 × circularly polarized (CP) antenna array composed of H-shaped patches. The uniqueness this CP is its feeding network, where state-of-the-art metamaterial transmission lines (MMLs) are built to obtain the required quadrature phases. Experimental results show that feed network has excellent power distribution and progressive phases over wide bandwidth. As consequence, MML-based exhibits performance, viz. 85% impedance bandwidth (SWR ≤ 2), 89% axial-ratio (3-dB)...

In this paper, we introduce a reconfigurable artistic patch antenna with unidirectional circular-polarization (CP) radiation. The novel geometry composed of Chinese character Meng shaped and dual L-shaped feeding probes that are connected to PIN-diode-based switching circuit. simulated experimental results show the proposed achieves operating bandwidth from 2.4 2.5 GHz covers dynamically 14 channels IEEE 802.11/b/g/b/ax. By L-probes, either left-handed CP or right-handed can be generated...

In this article, a three-element circularly polarized multiple-input-multiple-output (CP-MIMO) antenna array with self-decoupled probing method is introduced. Three unidirectional radiated Guo-shaped patch antennas were arranged in triangular lattice and excited by L-shaped feeding probes at different locations respect to the center. Meanwhile, patches themselves remained artistic placed upward position. Namely, main motivation generate CP directional beams without requiring orthogonal...

This paper proposes a metamaterial re∞ective surface (MRS) as superstrate for single-feed circularly polarized microstrip patch antenna (SFCP-MPA). It illustrates simultaneous enhancement on gain, impedance bandwidth (ZBW) and axial-ratio (ARBW) by adding the MRS atop SFCP- MPA. The can enhance ZBW ARBW 3.5 9.9 times, respectively, compared to source. Moreover, gain of CP-MPA with is 7dB higher than that conventional CP-MPA. small spacing between source another merit in present design, which...

Bandwidth and gain enhancement of microstrip patch antennas (MPAs) is proposed using reflective metasurface (RMS) as a superstrate. Two different types the RMS, namely- double split-ring resonator (DSR) closed-ring (DCR) are separately investigated. The two antenna prototypes were manufactured, measured compared. experimental results confirm that RMS loaded MPAs achieve high-gain well bandwidth improvement. desinged superstrate has over 9.0dBi wide impedance 13%. also utilized to thin with...

A metasurface which is considered as a polarizer for microwave antennas proposed in this paper. Preliminary results have shown that circularly polarized (CP) radiation can be obtained from linearly (LP) source with the use of metasurface, antenna performance such realized gain, efficiency and bandwidth are improved simultaneously. The metasurfaced succinct non-resonant cavity sub-wavelength (1/13 λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML"...