This letter presents a slot-loaded Yagi patch antenna with dual-band and pattern reconfigurable characteristics. The beam can scan in the E-plane by switching modes of antenna, which is implemented changing states switches installed slots etched on parasitic patches. Different have different radiation patterns operating frequency bands. There are three having common band 9.15-9.45 GHz their beams direct to -7deg, +33.5deg, -40deg E-plane. Two among also another around 10.3 main +58.5deg...

A wide-beam antenna and a planar phased array with wide-angle scanning performance based on image theory are proposed. To solve the problem, summative evaluation of basic types carrier-based antennas is given available for arrays or end-fire pointed out. Afterward, an artificial magnetic conductor (AMC) ground The main beam direction can scan from -89° to 90° in H-plane gain fluctuation less than 3 dB 3-dB beamwidth cover range -105° 105°. An excellent broadside be obtained by proposed...

A compact reconfigurable rectifying antenna (rectenna) has been proposed for 5.2- and 5.8-GHz microwave power transmission. The rectenna consists of a frequency microstrip circuit. Here, the use odd-symmetry mode significantly cut down size by half. By controlling switches installed in circuit, is able to switch operation between 5.2 5.8 GHz. Simulated conversion efficiencies 70.5% 69.4% are achievable at operating frequencies GHz, respectively, when given with an input 16.5 dBm. Experiment...

This communication presents a novel compact broadband circularly polarized (CP) implantable patch antenna for biomedical applications in 2.4 GHz industrial, scientific, and medical (ISM) band. By employing slots on the plane shorting method, whole size (including superstrate) of designed can be enormously reduced to 9.8 × 1.27 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> , which is equivalent 0.0784λ <sub...

A broadband polarization reconfigurable rectenna is proposed, which can operate in three modes. The receiving antenna of the a planar monopole antenna. By installing switches on feeding network, switch to receive electromagnetic (EM) waves with different polarizations, including linear (LP), right-hand and left-hand circular polarizations (RHCP/LHCP). To achieve stable conversion efficiency (n <sub xmlns:mml="http://www.w3.org/1998/Math/MathML"...

A two-port pattern reconfigurable three-layered Yagi-Uda patch antenna with ±45° dual-polarization characteristic is presented. driven (DP) and two large parasitic patches (LPPs) are printed on the top side of middle layer, bottom layers share a common metal ground. Two microstrip feedlines orthogonally layer used to feed DP through H-shaped slots etched in The LPPs connected to/disconnected from ground controlled by switches. By adjusting connection states LPPs, one wide-beam mode three...

A hybrid metasurface (HMS) is proposed to form a low-profile wideband antenna array. The element an array of 4 × square metal patches and fed by 50 Ω microstrip line through H-shaped coupling slot on the ground plane. Only are edge HMS grounded shorting pins for suppression surface waves crosspolarization levels as well enhancement gain. With element, compact 2 χ with overall size 1.58λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub>...

Abstract A miniaturized broadband planar monopole multiple‐input‐multiple‐output (MIMO) antenna is proposed for the 3.5 GHz frequency band of Long‐Term Evolution Advanced application. Two novel metamaterial split‐ring resonator units are used to reduce mutual coupling MIMO antenna, also expanding impedance bandwidth. The size whole 47.5 mm × 40 1.6 (1.15λ g 0.97λ 0.039λ ) and center distance between two elements only 0.25 λ 0 . measured results agree well with simulated ones. 10‐dB bandwidth...

To speed up the design process of antenna arrays, a new multibranch artificial neural network (ANN) modeling technique is proposed and applied to tackle inverse problem array directivity estimation. In an array, model inputs are electromagnetic parameters, whereas geometrical or physical parameters set as outputs. Due nonuniqueness problem, it difficult directly use ANN for modeling. We trying solve this utilizing monotonicity. The directional derivatives corresponding forward calculated...

A planar ultrawideband (UWB) monopole antenna is proposed in this paper. It has a multiple-trapezoidal with adjustable dimensions. The incorporated the rectangular/rounded-corner ground plane to further improve performances such as impedance bandwidth. geometric complexity of configuration not easily devisable when UWB performance criteria low voltage standing wave ratio (VSWR), minimal size, omni-directional and uniform radiation pattern, relatively constant gain over ultrawide frequency...

A reconfigurable crossed-Yagi patch antenna (CYPA) that yields a circularly polarized pattern is proposed, and optimized by novel Jumping-Genes Genetic Algorithm. This formed two identical orthogonal linear Yagi arrays, around single driven element. The main lobe of the covers elevation angles from 0° to 47° with peak gain 8.68 dBi. Full azimuthal coverage can be achieved switching among four modes. design justification has been duly demonstrated based on fabricated prototypes. effect MEMS...

An efficient gradient‐based optimisation method is proposed for designing pixel antennas with hundreds of connections, where the connections between adjacent square patches are modelled by lossy materials continuous density variables. The gradients antenna objective functions respect to these variables derived adjoint variable method, at cost less than two times simulation. With a solver, four 220 optimised. optimised achieve different expected polarisation and/or radiation patterns. All...

A hybrid topology optimization method that integrates material distribution and level set methods (LSMs) is proposed. The of the antenna optimized first by method, then, derived structure, which has a zig-zag boundary, further LSM. By adopting this strategy, powerful topology-searching ability advantageous feature producing structures with smooth low sensitivity boundary LSM are fully exploited. To optimize antenna's radiation characteristics, analysis power density far-field formulated....

To expedite the design process of metasurface, an improved transfer function (TF)-based artificial neural network (ANN) model is proposed, which can directly generate structure parameters to match customer-expected electromagnetic (EM) response. Compared with existing inverse techniques, poles and residues TF instead EM responses at discrete points are input into proposed model. identify solution circumvent nonuniqueness problem, major challenge design, a novel new training error proposed....

A compact wideband filtering patch antenna with high selectivity is presented. The proposed contains a rectangular rounded by pair of U-shaped patches, and fed through two coupling slots etched on the ground. By introducing these elements, four in-band resonances are generated impedance bandwidth expanded. Besides, multiple paths constructed from feeding port to radiating patches form three radiation nulls at band edges. Moreover, modified composite right/left-handed transmission line unit...

A machine-learning-based generative optimization method using masked autoencoders (MAE) is proposed and applied to multiobjective antenna decoupling structure design. The machine learning contains <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$k$ </tex-math></inline-formula> -means algorithm MAE neural network structure. used for label-free classification of samples, the intelligent design structures. By...

BACKGROUND Gastric mixed-adenoneuroendocrine carcinoma (G-MANEC) is a subtype of gastric cancer. Building upon prior research findings, we propose that tumours containing both neuroendocrine (NEC) and adenocarcinoma (AC) components, with each component ranging from 1% to 99% the tumour, be classified as distinct entity. We hereby term this adenoneuroendocrine mixed cancer (G-ANEC). Research on lymph node (LN) involvement in G-MANEC has focused mainly metastasis status, limited studies...

In this paper, we present a transverse electric (TE)-polarized Bessel-beam antenna in the microwave range based on leaky radial waveguide. According to dispersion equation, an inductive sheet over ground plane is needed. To achieve sheet, grid structure printed dielectric substrate designed. Besides, waveguide coaxially fed with quasi-loop shaped excite TE mode. The proposed investigated by simulation and measurement. measurement, small loop used probe near magnetic field, accurate measured...

A magneto-electric dipole (MED) multiple-input–multiple-output (MIMO) antenna with low-profile, dual-polarized, and substrate integrated properties is proposed. The element composed of four fan-shaped patches lying on the radiation plane vertical metal vias linking ground. Compared common MED antennas, proposed has a lower profile 0.1λ. Besides, it fed by microstrip lines via two orthogonal H-shaped slots, resulting in broad impedance bandwidth 40% (3–4.5 GHz) steady gain entire operational...

An ultrathin dual polarization Huygens' element (HE) is proposed based on a novel degeneracy method for electric and magnetic resonance modes. This HE exhibits wider operation bandwidth higher transmittance than the other hole-free dual-polarization lens antenna (LA) elements of similar thickness. By arranging three pairs bilayer-dipole-pairs (BDPs) in parallel, achieves modes at same frequency. In addition, mutual coupling between effectively eliminated by implementing reverse translation...

Reservoir computing is a machine learning paradigm with lower training costs that replaces traditional recurrent neural networks in some time series processing areas to simplify complexity. The compact network structure and low-complexity method of this approach make it more suitable for hardware implementation, reservoir exhibits unique advantages over other deep models. Memristor single device can change its resistance state by memorizing the applied voltage or history current. non-linear...

A two-channel frequency reconfigurable rectenna that can perform microwave power transmission (MPT) and data communication simultaneously are proposed in this paper. The contains a low/medium rectifying circuit two-port dipole antenna, which provides one channel for MPT communication. p-i-n diode switch installed on the feeding network is used to control operating of enabling two channels work either different or common band. By adopting defected ground structure, good isolation (S <sub...

Microstrip conical-beam antennas are designed by the topology optimization of metallic patches combining discrete vias. The to be angular-periodic structures with eight identical sectors, which makes rotational symmetric radiation pattern more easily achieved and problem much easier solved. A restarting technique is introduced for circular polarization design case, where high cross-polarization discrimination (XPD) hard realized. By increasing weight penalization function after restarts,...

A compact dual-polarized filtering antenna with differential feeding and double-layer metasurface is investigated. The proposed consists of a pair suspended crossed dipoles, metasurface, eight off-center metalized vias, four center-shorted square split rings (CS-SSRs). By utilizing the radiation null realized in upper lower stopbands, respectively. Besides, two more nulls are obtained at band edges by loading CS-SSRs beside which further suppresses level stopbands improves frequency...