This paper presents a near-field-focused (NFF) substrate-integrated waveguide (SIW) antenna at center frequency of 35 GHz with 2-D steerable focus. The proposed is achieved by combining an NFF leaky-wave slot array focused multibeam SIW Rotman lens. In most the existing planar antennas, total phase distribution on radiating aperture separated into two parts respect to E-plane and H-plane, which leads large error deteriorates performance. Here, modified synthesis method calculate desired...

A dual-band shared-aperture variable inclination continuous transverse stub (VICTS) antenna is designed with good port isolation and a low profile. The operation bands, including 19.5-20.1 28.8-29.6 GHz, locate at the regulated bands for Kand Ka-band mobile satellite communication. design principle "shared radiating aperture independent feeding networks," which means two networks are integrated to share one aperture. At center frequencies of that is, 19.8 29.2 beam-scanning coverage in...

The quadratic phase distribution on the antenna aperture is necessary to produce a near-field-focused (NFF) beam. generation, as well steering of distribution, difficult for series-fed NFF array antenna, especially large-aperture application. This because control capability planar beam-forming network limited. In this paper, curved substrate integrated waveguide (SIW) employed feeding carrier enhance amplitude and capability. spatial placement SIW slot can be sufficiently used synthesize...

The analysis and design of a millimeter-wave conical conformal shaped-beam substrate-integrated waveguide (SIW) array antenna is demonstrated in this paper. After investigating the influence surface on propagation characteristics SIW, modification for width SIW proposed to obtain same characteristic along longitudinal direction. This feature indispensable employ classic equivalent circuit planar slot antenna. In case, process can be simplified. An efficient accurate model method presented as...

A V-band wideband circularly polarized (CP) endfire multibeam antenna array with the wide beam coverage is presented in this letter. First, a compact CP element axial ratio (AR) beamwidth proposed. The design procedure and working principle of are discussed detail. Besides, connected holes used to reduce mutual coupling improve AR performance. After that, substrate integrated waveguide Butler matrix designed feed array. Finally, fabricated, measured investigated. results demonstrated that...

A wideband air-filled plate array antenna with multistage impedance matching operated in D-band is proposed this article. To achieve the wide bandwidth, three stages of are introduced 2 × subarray, including step-profiled horn element, power divider cavity two resonant points, and a modified E-plane bend transition. The integrated simple configuration can realize broadband matching. Wideband T-junctions combined together to form corporate feeding network. Essential pins break through upper...

A millimeter-wave substrate-integrated waveguide (SIW) antenna with the ability of generating 2-D steerable large depth-of-field beam is presented in this article. First, a transverse topology feeding series- and parallel-network employed to generate limited-diffractive depth field overcome problem that conventional radial generator cannot steer its electronically. The proposed achieved by combining modulated leaky-wave slot array modified multibeam SIW parabolic reflector. stepped-width...

For a traditional slot array antenna, the sidelobe level (SLL) is usually reduced by applying taper amplitude distribution. Typically, each of linear and stage power divider should be carefully modulated to satisfy requirements on low SLL in both E- H-planes. However, for at W-band or higher, varied distribution unequal feeding network are very sensitive even slightest inaccuracy parameter, which makes it challenging distinguish expected amplitudes within constraints fabrication resolution....

A millimeter-wave near-field-focused (NFF) full 2-D frequency-scanning antenna array is presented in this article. The proposed achieved by combining an NFF ridged-waveguide slot with a double-layer folded focused progressive feeding network. linear designed height-modulated ridge to focus on the power one direction. line different length used generate desired phase and frequency-dependent shift other In case, as working frequency swept considered range, inherent behavior of leaky-wave (LWA)...

In this paper, a novel through mold via (TMV)-embedded fan-out wafer-level package (FOWLP) technology was demonstrated to manufacture the well-designed Antenna in Package (AiP) with ultrathin thickness (0.04 λ0). Double-sided redistribution layers (RDLs) were employed build patch antenna, while TMV interposer used connect front and back RDLs. By optimizing AiP’s parameters, antenna can achieve wide impedance bandwidth of 17.8% from 24.2 28.5 GHz, which cover 5G frequency bands. Compared...

Terahertz (THz) communication systems suffer severe blockage issues, which may significantly degrade the communica tion coverage and quality. Bending beams, capable of adjusting their propagation direction to bypass obstacles, have recently emerged as a promising solution resolve this issue by engineer ing trajectory beam. However, traditional bending beam generation methods rely heavily on specific geometric properties can only achieve sub-optimal performance. In paper, we propose new...

This paper presents a 2-D near-field focusing (NFF) substrate-integrated-waveguide (SIW) leaky-wave antenna (LWA) array with high radiation efficiency. In most of the existing NFF arrays, required quadratic phase and balanced amplitude distribution are achieved by use transverse topology complex feeding network or simple radial polarization loss. Here, folded reversely fed LWA is proposed to achieve natural sample series-fed network. Meanwhile, width single linear complementary topology....

A W-band low-profile dual-polarized Cassegrain reflectarray with an integrated feed is designed in this work. High isolation, which necessary for the in-band full-duplex (IBFD) applications, realized between two feeding ports corresponding to orthogonal polarizations. The antenna composed of parts, i.e., planar-array and a small focal-length diameter ratio ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math...

In this article, a 2–18 GHz phased array antenna with low-profile, low radar cross section, (RCS) and cylindrically conformal shape is presented. To achieve 9:1 impedance bandwidth extra-low profile, the distributed capacitance structure added into feeding balun instead of traditional shorting strips for resonance suppression. This can avoid introducing parasitic loop-mode, elimination which generally increases profile based on existing methods. Furthermore, to improve matching without...

The conventional spherical conformal phased-array antenna (SPAA) has a wide beam coverage but suffers from high profile due to its carrier. In this article, low-profile array is modified the SPAA, which can be called concave sector-cut (CSSPAA). A distributed aperture synthesis employed guarantee that performance of CSSPAA close SPAA after reducing height as much possible. CSSPAA's and element's half-power beamwidth (HPBW) are properly designed minimize blockage influence special topology...

A THz 2-D frequency scanning planar integrated array antenna is developed in this letter. Eight leaky-wave antennas are combined with a true-time-delay (TTD) phase-shifting feeding network to steer the beam two directions by sweeping frequency. Several H-plane 90° bends linearly increased length adopted achieve scalable TTD phase shift. The lines closely spaced reduce occupied area progressive scheme. Besides, E-plane 180° bend used construct double-layer network, maintain number of multiple...

The transverse linearly polarized beam can maintain its polarization when reflected, which is important for a detection system. Most of the existing planar Bessel generators are implemented in central feeding radial topology and hard to generate with linear polarization. In this communication, substrate integrated waveguide (SIW) slot array antenna proposed beam. desired phase amplitude distribution be easily realized by such an array. With inherent 0°/180° output comb-like divider...

It is difficult for a standing-wave waveguide slot array antenna to generate complex beam shape in H-plane, such as the cosecant squared pattern. The reason that conventional cannot flexibly and independently adjust amplitude phase of radiating elements. In this article, proactive conformal designed with pattern its H-plane. able control element by proactively curving shape. That means employed new parameter break limitation control. Based on this, can modulate form desired far-field...

A millimeter-wave self-progressive near-field focusing (NFF) 2-D full frequency scanning ridge-gap waveguide slot array antenna is proposed in this article. In the antenna, adjacent linear NFF leaky-wave antennas (LWAs) are connected end to a double layer folded structure construct phase shift feed network. Thus, desired high progression design of provided by LWAs themselves with superposed propagation length. As result, performance can be achieved without increasing area based on...

A <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\text{K}_{\mathrm {u}}$ </tex-math></inline-formula> -band deployable fully dielectric Luneburg lens antenna based on the pop-up kirigami sphere is presented in this article. The implementation method that proposed discretized into multiple concentric spherical shells and each shell subpartitioned by two orthogonal rows of parallel loops. Flexible joints...