A novel CPW-fed planar printed monopole antenna with broadband circular polarization (CP) characteristic is presented. The proposed consists of a rectangle patch and an improved ground-plane. By appropriately adding vertical stub cutting horizontal slit on the ground-plane, impedance bandwidth enlarged, its wide axial-ratio (AR) achieved. measured results show that has not only broad 3-dB AR 44.9% (2.65 GHz, 4.58-7.23 GHz) respect to CP center frequency 5.90 but also 10-dB return loss 76.9%...

A novel compact ring monopole antenna with double meander lines is proposed for wireless local area networks (WLAN) applications in IEEE 802.11b/g/a systems.The designed antenna, fed by a 50 Ω microstrip transmission line, only 32 mm height and 16 width.By introducing horizontal vertical branched strips to closed rectangular strip ring, the can generate two separate impedance bandwidths.Prototypes of have been constructed tested.The obtained bandwidths reach about 12% 2.4 GHz band 45.3% 5...

LOWPASSFILTERDESIGNOFHILBERTCURVERINGDEFECTEDGROUNDSTRUCTUREJ.Chen,Z.-B.Weng,Y.-C.Jiao,andF.-S.ZhangNational Key Laboratory of Antennas and Microwave TechnologyXidian UniversityXi’an 710071,ChinaAbstract—In this paper,a novel Hilbert curve ring (HCR) fractaldefected ground structure (DGS) its equivalent circuit areinvestigated. Furthermore,an improved HCR DGS cell model withopen stubs loaded on the conductor line is then presented to improvethe out-band suppression. By employing three...

A novel dielectric resonator antenna (DRA) is proposed for ultrawideband (UWB) applications, where a simple rectangular excited by bevel-shaped patch connected to coplanar waveguide (CPW) feeding line. It found that the bandwidth of resonant modes can be expanded using CPW-fed ground and patch, thus UWB performance achieved. Experimental numerical results were carried out, showing good agreement. The measured demonstrate DRA achieves an impedance more than 3:1, covering frequency range from...

A new single-fed wide dual-band circularly polarized (CP) dielectric resonator antenna (DRA) is presented in this letter. The DRA excited by a microstrip line through the narrow underneath rectangular aperture, and its HE <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">111</sub> xmlns:xlink="http://www.w3.org/1999/xlink">11δ</sub> (2 <; δ 3 ) modes are utilized for design. To achieve CP fields, two notches truncated from cylindrical at φ = 45...

A low-profile broadband circularly polarized (CP) microstrip antenna with a wide beamwidth is proposed for global navigation satellite system. Four claw-shaped parasitic branches are placed on the corners of ground to widen impedance bandwidth (IBW) and half-power (HPBW) simultaneously. Several slots etched radiation patch obtain matching. The fabricated measured. experimental results show that IBW VSWR ≤ 2 72.5% from 1.02 2.18 GHz, 3 dB axial-ratio 54% 1.15 GHz. HPBW beyond 100° overall CP...

A Dual-band MIMO antenna for the 5G communication is proposed in this paper. The consists of four antenna, it operating at 3300–3600 MHz and 4800–5000 MHz. designed letter are different from traditional antennas, paper perpendicular to edge system circuit board, can be applied popular full-screen mobile phone. According simulation results, reflection coefficient modulus less than −6 dB, isolation better 12 dB over band-frequency MHz, will met needs future applications.

A multiband dual-polarized omnidirectional antenna for 2G/3G/Long Term Evolution (LTE) mobile communications is proposed in this letter, which consists of horizontal polarization (HP) and vertical (VP) element with separate feeds. The VP three polygonal radiation patches equally spaced legs shorted to the ground plane. HP wideband slot loop structures, nested on top element. Three structures provide a 360° coverage enhance its bandwidth. Both simulated measured results indicate that...

A low-cost, wideband printed circuit boards (PCBs) manufactured antenna is proposed in this letter for 5G/6G antenna-in-package (AiP) applications with common-mode current (surface-wave) choking characteristics. The based on a grounded, wideband, high-efficiency electromagnetic structure (WHEMS) and backing cavity, which radiating choke introduced. By changing the condition of quarter-wave length, widely applied traditional low-frequency baluns, suppression achieved. enclosing wall cavity...

A dual-linearly polarized (LP) leaky-wave antenna (LWA) with low cross-polarization levels is proposed. The LWA 14 circular patches fed by symmetrical spoof surface plasmon polariton (S-SSPP) lines. When the S-SSPP lines are excited a common mode, z-components of magnetic fields out-of-phase, and those electric in-phase, due to structure. radiation generated couplings (M-couplings) between these two SSPP transmission patch array strengthens each other, while cross-polarized produced...

In this letter, a low-profile wideband pattern diversity antenna based on metasurface (MTS) is proposed. Initially, the theory of characteristic mode (TCM), two adjacent intrinsic modes, which correspond to broadside and conical radiation pattern, respectively, are exploited realize under low profile. Then, by analyzing modal current distribution MTS, optimal locations, orientations relative phases four L-shaped feeding probes determined excite above modes. However, in-band high-order modes...

As a very powerful optimisation approach, differential evolution algorithm for continuous problems has been applied to electromagnetic (EM) design problems. However, the of thinned array can be formulated as discrete-variable problem with solutions encoded binary strings. Here, Boolean (BDE) 0–1 integer programming is proposed planar arrays minimum sidelobe levels. The BDE only one control parameter easily implemented. Meanwhile, fast Fourier transform employed speed up calculation pattern....

A new dielectric resonator antenna (DRA) is introduced for ultrawideband applications. Three methods of a Z-shaped resonator, bevel feeding patch, and an air gap between the DR ground plane are used to obtain impedance bandwidth. The effective constant -factor can be reduced by introducing gap. bevel-shaped mechanism provides smooth transition from one resonant mode another. Furthermore, results show that applying DRA, electric field inside reformed over desired bandwidth leading improve...

A compact wideband high gain directional antenna is proposed in this paper for marine communications. The consists of a back plane (reflector), slot-loop (driven element), and director rod. Based on the current distribution, equivalent to an array three linear dipoles. dipole acts as element director, which provides efficient according theoretical analysis. Both impedance bandwidth 1 dB are 45% covering 1.7-2.7 GHz design. 11.2 12.2 dBi obtained working band with only one set directors....

A wideband omnidirectional antenna is presented in this letter. The proposed consists of three radiators over a ground plane, monopole composed patches fed by coaxial line, coupling patch with shorting legs above the to extend lowest frequencies operation, and top-loading disk located on top for further decreasing operation. An enhanced impedance bandwidth 9.23:1 ranging from 650 MHz 6 GHz 13.9 dB (for SWR ≤ 1.5) achieved. meets network operator's requirements cellular bands has good...

A novel wide-beamwidth rectangular dielectric resonator antenna (DRA) is proposed. By loading two pairs of higher-permittivity slabs symmetrically on opposite surfaces the DRA in one direction parallel to feeding slot, E-plane radiations from are restrained. Dimensions and relative permittivity adjusted, beamwidths expanded. Moreover, sides metal ground plane another perpendicular slot folded down, H-plane broadened. In order verify design feasibility explain operating principle, a with TE...

A new dielectric resonator antenna (DRA) is introduced for ultrawideband applications. rectangular resonator, a bevel feeding patch and an airgap between the DR ground plane are used to obtain impedance bandwidth. The effective constant Q-factor can be reduced by using bevel-shaped mechanism, which provide smooth transition from one resonant mode another. Measured results demonstrate that proposed DRA has wide bandwidth 2.6 11 GHz with VSWR less than two, covering frequency range of more...

Abstract In this paper, a novel compact printed monopole antenna with multiband operation for wireless local area networks (WLAN) is presented. A simple C‐shaped strip and straight of provide two resonant paths to achieve 2.4‐, 5.2‐, 5.8‐GHz operation. Good similar omnidirectional radiation patterns in the azimuth plane proposed radiator size 11.5 × 8.5 mm 2 desired frequency bands have been achieved. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 365–367, 2008; Published...

A novel loop linear array for circularly polarized (CP) radiation with low sidelobe levels (SLLs) and high gains is proposed in this letter. The resonant element consists of a pair loops fed by slot. Moreover, two square patches are added on the opposite corners both to implement circular polarization. Fed slotted substrate integrated waveguide, 10-element Taylor distribution then designed, manufactured, measured. Measured results show that fabricated has bandwidths 350 MHz (9.76-10.11 GHz)...

A wideband and compact Fabry-Perot resonator antenna (FPRA) employing two layers of partially reflective surfaces (PRSs) is presented in this letter. The proposed PRSs with regular hexagonal units are used FPRA for the first time. Based on arrangement hexagon addition tripod branches, size greatly reduced. Furthermore, arranged periodically along three directions 2-D plane, which means that one unit has six identical around it. Therefore, there a strong coupling between PRS units, obtain...

A novel circularly polarized (CP) dielectric resonator antenna (DRA) array is introduced. The DRA element operating at the desired frequency determined by waveguide model (DWM), and two orthogonal modes are generated to excite CP waves. 4 × 4-element then developed. fed cavity-backed slotted substrate integrated waveguide, without using extra feeding network. Experimental results show that obtains a bandwidth of 240 MHz (9.88-10.12 GHz) for reflection coefficients axial ratios (ARs) less...

A Wi-Fi dual-band directional antenna is presented herein. The proposed consists of a bent ground-backed slot-loop structure to form antenna. aperture the element and offset from ground plane have opposing functional variation for beamwidth adjustment. By utilizing both factors, consistent achieved. has high radiation efficiency over bands. achieves H-plane consistency, which varies within 5° two gain 9 9.5 dBi, respectively, in 2.4 5 GHz bands, stable 66°-71° operating bands can be used...

With the widespread use of vehicles, finding an empty parking space in a lot has become problem that most drivers encounter daily, particularly urban environments. In this article, 3-D printing high-gain dielectric lens K-band antenna is designed for smart radar system performs dual-mode detection by using magnetic sensor to improve accuracy detection. The proposed uses wideband high-efficiency electromagnetic structure (WHEMS) as primary feed antenna. etched on substrate and can be easily...

A gain-stabilized broadband Fabry–Perot cavity antenna (FPCA) is presented, based on a single-layer partially reflective surface (PRS). The proposed PRS employs compact double-sided structure in regular hexagonal arrangement to achieve wide range of positive phase gradient from 7.9 10.9 GHz. unit composed circular patch and fan-shaped tripod within aperture, which printed both sides the thin dielectric substrate. slot with nonuniform parasitic patches applied as source FPCA, provides smooth...