With the demanding system requirements for fifth-generation (5G) wireless communications and severe spectrum shortage at conventional cellular frequencies, multibeam antenna systems operating in millimeter-wave frequency bands have attracted a lot of research interest been actively investigated. They represent key technology supporting high data transmission rate, an improved signal-to-interference-plus-noise ratio, increased spectral energy efficiency, versatile beam shaping, thereby...

In this paper, a new guided wave structure of half mode substrate integrated waveguide (HMSIW) for microwave and millimeter application is proposed the first time. The principle HMSIW described, its propagation characteristics are simulated measured. measured results at bands show that attenuation it less than conventional microstrip even SIW, but size nearly SIW. Thus, we can further compress or circuit based on structure.

Three types of ultrawideband (UWB) antennas with triple notched bands are proposed and investigated for UWB communication applications. The consist a planar circular patch monopole antenna multiple etched slots on the and/or split ring resonators (SRRs) coupled to feed line. Good agreement is achieved between simulated measured results. These techniques significant designing narrow frequency or multiband antennas.

A metamaterial (MTM)-based thin planar lens antenna is proposed for spatial beamforming and multibeam massive multiple-input multiple-output systems. The consists of a linear array receive/transmit elements. To lower the insertion reflection loss, formed by two-layered ultrathin MTM-based surface separated with air fed substrate integrated waveguide-fed stacked-patch antennas. effects focal-to-diameter ( f/D) on power distribution are investigated to work out design method. seven elements...

In this letter, a new type of wideband substrate integrated waveguide (SIW) cavity-backed patch antenna and array for millimeter wave (mmW) are investigated implemented. The proposed is composed rectangular with backed SIW cavity. order to enhance the bandwidth radiation efficiency, cavity designed resonate at its TE <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">210</sub> mode. Based on antenna, 4 × also designed. Both fabricated standard...

Substrate integrated waveguide (SIW) cavity backed dual-band triangular-ring slot (TRS) antennas are proposed for planar integration. First, a low profile dual band 45 <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex Notation="TeX">$^{\circ}$</tex> </formula> linearly polarized (LP) antenna is designed and analyzed. The dual-mode TRS developed by simultaneously exciting the mode of patch inside slot. To minimize...

This paper proposes a type of quasi-elliptic filter with controllable electric and magnetic mixed coupling based on substrate integrated waveguide cavity resonators using two-layer printed circuit board process. For the second-order filter, an embedded short-ended strip line is combined conventional inductive window between two cavities to create coupling, in which can be separately controlled by adjusting width window, transmission zero produced below or above passband. local multipoint...

The design of lightweight, compact-size, and high-directivity conical horn lens antenna that covers both 71-76 81-86 GHz bands is presented in this letter. conventional moderate-gain integrated with a planar inhomogeneous dielectric flat transmit-array having diameter 35 mm thickness 6.35 by covering its aperture. designed based on the perforating technique drilling numerous holes variable diameters through host material. unit cell size about λ <sub...

Ultra-dense networks (UDNs) provide an effective solution to accommodate the explosively growing data traffic of multimedia services and real-time applications. However, densification large numbers static small cells faces many fundamental challenges, including deployment cost, energy consumption control, so on. This motivates us develop software-defined space-air-ground integrated moving (SAGECELL), a programmable, scalable, flexible framework integrate space, air, ground resources for...

A novel dual-band patch antenna operating at 28/38 GHz is proposed for multiple-input multiple-output (MIMO) communication systems in this paper. The utilizes substrate integrated waveguide (SIW) transmission line as the feed by means of a coupling slot on SIW. square functions radiator 28 GHz. inductive loading, which presents pair shorting pins design, achieves impedance matching GHz-band. Etched patch, H-shaped makes to performance an containing two radiating arms and thus introduces...

Millimeter-wave (mmWave) frequency bands, which offer abundant underutilized spectral resources, have been explored and exploited in the past several years to meet requirements of emerging wireless services highlighted by high data rates, ultrareliability, ultralow delivery latency. Yet, unique characteristics mmWave, e.g., continuous wide bandwidth, large path, penetration losses, along with hardware constraints, call for innovative technologies mmWave communication. Recently, an extensive...

A technique to design substrate integrated waveguide (SIW) slotted narrow-wall fed cavity antennas is presented and investigated for millimeter-wave systems. The proposed antenna consists of a feeding SIW high permittivity dielectric loaded (SIC) in co-planar configuration. First, the modes are analyzed selecting structure. Then, equivalent circuit structure formulated reveal mechanism wideband operation antenna. arrays operating at 35 60 GHz bands fabricated with printed board (PCB)...

An integrated design of a planar source-fed folded reflectarray antenna (FRA) with low profile is proposed to achieve high gain for Q-band millimeter wave data rate wireless communication applications. A substrate waveguide (SIW) slot array adopted as the primary source illuminate FRA. Considerations off-focus loss and asymmetry E- H-plane beamwidths are thoroughly investigated improve aperture efficiency antenna. prototype implemented experimental results in good agreement predictions,...

In this article, integrated millimeter-wave (mmW) broadband circularly polarized (CP) single-beam/multibeam antennas (MBAs) are reported. The comprised a Berryphase (BP) transmit-array (TA) containing three layers of slotted elliptical metallic resonator arrays and cluster substrate waveguide (SIW) -fed CP source radiators with an anisotropic impedance surface (AIS) superstrate. By utilizing mmW radiators, BP-based transmission phase compensation, tailoring the dispersive transfer function...

Direct manufacturing of customized end-use electronic products is becoming an emerging trend additive (AM). This highly demands the evolution conventional AM processes from simply building single-material parts to simultaneously delivering complex structures and functionalities. In this work, we propose a novel hybrid solution that combines stereolithography (SLA) three-dimensional (3D) printing laser-activated electroless plating for manufacture 3D fully functional products. With our newly...

Investigations on planar ultrawideband (UWB) antenna with multiple band-notched characteristics based half mode substrate integrated waveguide technology are presented. The proposed consists of a UWB monopole and cavity which can generate stopbands by proper arrangement. Planar antennas dual, triple quadruple notched bands designed implemented. frequencies their bandwidths be adjusted according to specification altering the feed line independently. These fabricated two-layer printed circuit...

Abstract Performance in both frequency‐domain and time‐domain for a printed super‐wideband antenna is studied presented this article. The proposed consists of corner‐rounded ground plane, tapered microstrip feeder novel radiating patch which made by one half‐disc half‐ellipse. This configuration allows to implement ratio impedance bandwidth more than 25:1 voltage standing wave (VSWR) &lt; 2. Critical characteristics including transfer function, group delay pulse responses are experimentally...

In this communication, dual-fed wideband circularly polarized (CP) patch antennas based on the single-layer printed circuit board (PCB) process and substrate integrated waveguide (SIW) technology are proposed. Firstly, a antenna fed by an SIW coupler is developed to achieve measured 3 dB axial-ratio (AR) bandwidth of 21% (from 38 GHz 47 GHz). Then, introducing second-order inductive windows, improved CP developed. The results show that 1 gain expanded from 9 while overlapped AR reflect...

By directly incorporating a sub-wavelength amplifier chip into the spoof plasmonic resonator, quality (Q) factor of original passive resonator has been significantly increased by several orders magnitude. The is composed corrugated ring with slit whose optimized offset angle φ 45°, aiming to achieve better Q-factor. tuning bias voltage applied that placed across slit, Q from 9.8 21000 for quadrupole mode when plastic pipe filled polar liquids upon resonator. Experiments at microwave...

We present the modeling, design, and experiments of a class low-profile broadband dual-circularly polarized (DCP) reflectarrays (RAs) with independent beamforming for CP waves opposite handedness. The proposed DCP RAs are comprised by an array unit cells containing two cascaded anisotropic impedance surfaces backed ground plane. phase compensation offered RA is enabled simultaneously utilizing cell rotation-induced Berry dimension variation-induced dynamic phase. Numerical investigations...

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> In this paper, two types of half mode substrate integrated waveguide 180° couplers are proposed, the phase-shifting structures which composed metallic via fins or etched air slots. Each coupler maintains good performance with a reduction in size and phase difference between through coupling ports. Prototypes working <formula><tex>$C$</tex></formula>-, <formula> <tex>$X$</tex></formula>-,...

The average bit error rate (ABER) performance of an orbital angular momentum (OAM) multiplexing-based free-space optical (FSO) system with multiple-input multiple-output (MIMO) architecture has been investigated over atmospheric turbulence considering channel estimation and space-time coding. impact different types coding, modulation orders, strengths, receive antenna numbers on the transmission this OAM-FSO is also taken into account. On basis proposed model, analytical expressions received...