A low-profile broadband dual-circularly-polarized metasurface antenna is proposed. The consists of a modified cross-slot coupling with lattice 4 × square metallic patches. characteristic mode analysis used to investigate the operating mechanism antenna. Then, desired modes are chosen and excited by slots. slot introduces new resonance achieve characteristic. Two orthogonally placed microstrip lines both right-hand circular polarization left-hand in same frequency band. final prototype, an...

This letter proposes a low-profile circularly polarized metasurface antenna with wide axial-ratio beamwidth (ARBW). The proposed consists of an array square metallic cells that are excited by microstrip line through four cross slots. feeding structure can be seen as symmetrical multiplefeed structure. Thus, E <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">φ</sub> and xmlns:xlink="http://www.w3.org/1999/xlink">θ</sub> nearly equal in amplitude...

A broadband metasurface antenna is proposed in this letter. The based on a nonperiodic metasurface. modal behavior of the and slot analyzed using characteristic modes analysis (CMA). Three desired are found. Furthermore, acts not only as feeding structure but also metasurface-loaded antenna. By combining three slot, wide bandwidth achieved under multimode resonance. To verify design, simulated, fabricated, tested. results show that achieves impedance above 79% 3 dB realized gain 77%.

In this paper, we propose a low-profile ultra-wideband (UWB) antenna for wireless body area networks. The proposed is low-weight and easy to produce by printed circuit board manufacturing. Optimized shape of the radiation patch shorted top-loading patches are introduced broaden bandwidth reduce profile antenna. height 0.05λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> , where λ free-space wavelength at lowest operating frequency....

A low-profile dual-polarized metasurface antenna with high isolation and low cross-polarization is proposed in this communication. The consists of an array 4×4 patches. Through characteristic mode analysis (CMA), a pair degenerate modes identified to achieve the desired radiation features. By modifying patches metasurface, strongest current distributions two are moved from center edge metasurface. One feed port can efficiently excite only one particular mode, other cannot be excited...

For the application of ambient electromagnetic energy harvesting, it is important to collect as much possible in broadband and with arbitrary polarizations. Meanwhile, antenna should also have high receiving efficiency order effectively convert collected into radio frequency current. To meet this requirement, a novel dual circularly polarized (CP) dielectric resonator (DRA) proposed. The characteristic mode analysis (CMA) applied analyze proposed DRA reveal intrinsic behavior DR, so that...

A single-layer broadband vertically polarized (VP) omnidirectional metasurface antenna is proposed in this communication. To guide the optimization and design of antenna, characteristic mode (CM) analysis (CMA) performed to investigate intrinsic modal behaviors metasurface. with VP radiation first identified by analyzing an array <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$4 \times 4$...

A miniaturized ultra-wideband Vivaldi antenna is proposed in this paper. Optimized slots are inserted the radiation patches to obtain a low frequency resonance. Two substrates with put back back, forming double-layered structure. Thus, transverse E-field of doublelayered structure significantly reduced due symmetric treatment, which gives rise very cross polarization. The measured results show that an enhanced impedance bandwidth approximately 126% range 2.5-11 GHz (S <sub...

A low-profile circularly polarized (CP) omnidirectional metasurface antenna is developed and integrated with solar cells. The proposed consists of an array 4 × square rings. Square cells are mounted inside each ring. Characteristic mode analysis (CMA) used to analyze the modal behavior metasurface. results demonstrate that rings have a slight influence on antenna. This arrangement not only enables total exposure sunlight but also exhibits no degradation performance Then, by using proper...

Photodynamic coating was designed on the IOL surface <italic>via</italic> supramolecular self-assembly of α-CD-Ce6 and PPEGMA brushes. Such IOLs can reduce incidence posterior capsular opacification after implantation effectively safely.

The total focusing method (TFM) is an ultrasonic phased array imaging algorithm used in nondestructive testing (NDT) that processes large amounts of data from full matrix capture (FMC). This limits its application some industrial fields with real-time requirements. To solve this problem, a sparse optimization applied to FMC-TFM can reduce time consumption and improve efficiency. However, conventional intelligent methods, such as genetic (GA), use binary encoding, which require intensive...

This communication presents a method of designing filtering metasurface (MTS) antennas, which is to excite the candidate in-band modes and suppress out-of-band interference ones. The are selected depending on expected radiation patterns operating band excited by choosing reasonable feeding structure. suppression achieved controlling modal currents with aid characteristic mode analysis (CMA). As result, MTS works as radiator filter simultaneously. A <inline-formula...

In this letter, a simple method of generating tilted beam radiation through planar structure is presented based on mode synthesis. Under the guidance operating principle, low-profile metasurface-inspired antenna emitting designed with aid characteristic analysis. The printed nonuniform metasurface. A broadside supported by an etched slot while bidirectional excited metal via parasite microstrip line simultaneously. Consequently, can be obtained combining these two modes. To verify analysis...

A dual-polarized endfire array is presented in this article for millimeter application. The substrate integrated mode-composite transmission line introduced to exciting the radiation. Specially, horizontal polarization excited by transverse electromagnetic (TEM) mode, whereas vertical based on TE <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">10</sub> mode. Two metal blocks sandwich substrates form a structure, and an open-ended slot designed...

Aiming to realise an end‐on‐fire antenna with band rejection for ultra‐wideband (UWB) system, a planar quasi‐Yagi dual‐dipole structure is proposed. The comprises of coupling transition structure, two stripes and connected by coplanar stripline. compact arrangement the generates reverse currents at some specific frequency points on their edges, giving rise phase offsets in far field. This mechanism used design rejection. Simulated measured results show that proposed has bandwidth from 3.08...

Abstract A hybrid‐fed circularly polarized magneto‐electric (ME) dipole antenna is presented for 5G Wi‐Fi application. single series feeding cross‐aperture coupled structure used to stimulate the ME antenna. Measurement shows that has an overlapped bandwidth of 23.5% from 4.98 6.31 GHz standards both |S 11 | &lt; −10 dB and axial ratio 3 dB. measured gain approximately 7.5 dBi obtained fluctuation realized &lt;1 whole operating frequency band. Moreover, because advantages dipole, proposed...

In this work, a novel design concept of microstrip filtering array antennas is proposed and verified. concept, the radiation performance will be first established by antenna element, then optimized topology feeding structure with intrinsic resonant performance. This method achieves high-performance without requiring additional circuits, offering advantages over existing methods. To validate was designed fabricated. The element incorporated shorted pins, slots, metal strips on rectangular...

Bisphenol compounds play a pivotal role as essential diol monomers in the synthesis of numerous engineering plastics. However, conventional methods for their preparation often involve use concentrated inorganic acids, leading to significant environmental pollution and equipment corrosion. Herein, we developed strong acid-free synergistic catalytic system consisting Lewis–Brønsted acid catalyst composed ZnCl2 3-mercaptopropionic acid. This enabled highly efficient bisphenol through...

The output current ripple of the three-level (3-L) inverter is important to performance 3-L permanent magnetic synchronous motor (PMSM) drive system, but neutral point (NP) balance for T-type not considered in analysis up this point. NP algorithms change distribution and it necessary develop novel methods analysis. In study, sinusoidal pulse width modulation with zero-order voltage injection virtual space vector PWM (VSV-PWM) are utilised potential PMSM system. analytical under these two...

ABSTRACT A dual‐polarized dipole antenna with low cross‐polarization and high isolation characteristics is presented. The proposed composed of three basic structures, i.e., a horizontal rectangular ground plate, four vertical plates two patches on each them, substrate eight triangle patches. Every are put back‐to‐back which forms double‐layered structure. Thus the transverse E‐field structure significantly reduced because this symmetric treatment, gives rise to very cross‐polarization. Then...

Complementary sources concept and half-mode/quarter-mode substrate integrated waveguide (HMSIW/QMSIW) technology are introduced in this paper to improve the back-radiation suppression bandwidth of microstrip patch antennas (MPAs). The HMSIW cavity as feeding structure brings an additional resonant frequency inherent mode typical MPAs, which efficiently extends MPAs. In addition, while stimulating MPA mode, drives a monopole by slightly breaking shorting wall loading printed monopole. loaded...