This letter describes a simple beam-tilting technique for an endfire antenna using only single-layer frequency selective surface (FSS). The proposed approach is based on placing parasitic FSS element under the to tilt beam in desired direction. achieved by modified uniplanar compact FSS. To demonstrate principle, periodic structure applied Yagi-Uda operating millimeter-wave band from 28 31 GHz. measured results, integrating (one layer of 3 × 5 unit cells) directors antenna, show that at 30...

In this paper, two different methods for fabric characterization are presented: a single frequency method and broadband method. Felt denim fabrics characterized, patch antennas designed using these substrates to test both methods. Prototypes of the on felt manufactured conductive textile (called electrotextile) aiming obtain fully flexible antennas. The prototypes characterized in anechoic chamber be compared conclusions related A new dual-band hexagonal AMC reflector combinable with is also...

This letter presents a new design of tilted-beam antenna with gain enhancement based on the multilayer frequency selective surfaces (FSSs) for fifth-generation applications. A dual-sided printed FSS element two C-shaped resonators at top layer and slotted circular patch bottom side, is proposed. The holds size 0.46λ × (at 28 GHz). wideband Vivaldi an end-fire radiation used to excite elements layers. effects different sizes, number, angular rotation layers are employed achieve best...

The design of a novel textile monopole antenna based on zip at 2.5 GHz is presented. A prototype manufactured and characterised return loss radiation pattern. bandwidth characteristics obtained make the suitable to be used for WiFi applications in band from 2.4 2.7 GHz.

The current practice for designing antennas over artificial magnetic conductor (AMC) is time and labour intensive. A novel methodology described saving effort in such antennas. proposed method based on using conductive fabric as a radiating element. validated via the design of textile dual‐band monopole antenna AMC covering both WiFi 4G long term evolution (LTE) frequency bands.

In this letter, a dual-plane beam-sweeping dielectric resonator antenna (DRA) using cantilever enabled frequency selective surfaces (FSSs) is presented. The proposed consists of conventional cylindrical DRA and hexagonally arranged active FSS operating at 30 GHz band. Initially, the reconfigurable beams designed analyzed. Furthermore, prototype with designed, fabricated, measured. beam sweeping obtained in both azimuth elevation planes antenna. whole plane covered by switched six steps an...

This paper proposes a novel circularly polarized electromagnetic band-gap (EBG) antenna array backed by an artificial magnetic conductor (AMC) that operates in the 26-32-GHz bands. The designed is 2 x Yagi-Uda uses directors' semicircles to direct radiation horizontal end-fire direction. feeding of with two parallel T-junction portions forming network converts polarization from linear circular. An AMC placed underneath suppress backward and obtain propagation only +z plane. approach based on...

In this letter, a novel methodology using electrotextile fabrics is employed for designing highly transparent, wideband frequency selective surface (FSS) in the millimeter-wave band. The standard metallization replaced by low-cost, extremely fine conductive mesh (RadioScreen or VeilShield) that gives to periodic structure high see-through properties 27-35 GHz An acrylic dielectric material easily available and very low-cost has been used as substrate. Simulation measurement results alike are...

In this paper, a configuration is proposed to improve the performance of CPW antennas placed over an EBG material for dual band on body antenna applications. The aim was such type by varying position with respect antenna. Simulation results show that gain improved required frequency bands.

A novel ‘coplanar waveguide’‐fed planar monopole antenna with dual‐band operation for WiFi and ‘long‐term evolution 4G (LTE)’ applications is presented. The simple antenna's geometry composed of a circular radiating patch smiling slot, it occupies small size 41.6( L ) × 28.38( W 1.52( h mm 3 . Two operating bands covering 2.3–3.0 4.7–5.9 GHz are achieved by carefully optimising the position slot. An prototype has been manufactured characterised in terms return loss radiation pattern...

In this paper, a modified uniplanar compact antenna array is designed at millimeter-wave (mm-wave) frequency bands for future 5G communications. The proposed composed of five mm-wave hexagonal antennas forming an and printed on RO3003 flexible substrate. covers the 24-30 GHz range with bandwidth 6 exhibits maximum gain 10.7 dB. Moreover, pattern can be steered different desired angles by sweeping frequency, similar to leaky wave antenna. simplicity design makes it suitable

A novel dual-band textile hexagonal AMC design covering the entire 2.5/5.5 GHz WiFi bands for wearable applications is presented through FEM simulations and reflection coefficient phase measurements in anechoic chamber. The designed structure shows polarization-angle independence under normal incidence its angular stability oblique also analyzed.

A novel flexible and reconfigurable pattern antenna, integrated with an artificial magnetic conductor (AMC) surface, operating in the 29–31 GHz millimetre-wave frequency band, is proposed. The designed antenna a modified Yagi-Uda that uses as directors loop diamond shapes, allowing bending of structure easy way at high frequencies. AMC also composed array loops, printed on grounded dielectric substrate without vias. Furthermore, equivalent circuit model allows estimation resonant reflection...

In this paper, the bandwidth and dimensions of different dual-band Artificial Magnetic Conductors (AMCs) for 2.5/5.5 GHz WiFi applications are compared. The simulation results indicate that double hexagon structure presents a superior performance compared to others. measured two structures in very good agreement with simulated ones, hence, study is validated.

A beam‐switching antenna for millimetre‐wave applications at 30 GHz is presented in this study. The radiation reconfigurability a cylindrical dielectric resonator (DRA) obtained by using cantilever‐enabled frequency selective surface (FSS). proposed FSS provides reconfigurable bandpass and band‐stop performance with good isolation between them. investigation of designed performed electromagnetic simulation an array the unit cell fabricated measured free‐space measurement method, which shows...

Abstract A novel antenna candidate for intelligent wearable systems at 30 GHz is presented in this letter. It consists of a compact axial‐mode helical with ground plane mounted on plastic ring. This choice allows to achieve wide bandwidth and circular polarization package. prototype manufactured, the different classical key metrics are investigated: return loss, realized gain, axial ratio radiation pattern. The characteristics obtained make ring suitable be used MM‐wave applications within...

In this paper, a novel Artificial Magnetic Conductor (AMC) for 5G applications at 30 GHz is proposed. This structure integrated with CPW antenna as reflector to improve the gain and directivity mm-wave bands. The proposed design exhibits bandwidth from 24.3GHz 41.4 good matching, which includes wide range of required band wireless networks. An overall enhancement about 4 dB achieved.

The first textile monopole antenna design based on a zip at 2.5GHz is presented. Return loss and radiation pattern measurements are used to characterize manufactured prototype. obtained bandwidth characteristics make the proper be for WiFi applications in band from 2.4GHz 2.7GHz. In addition, this novel exhibits advantage of being easily tunable.

In this article, a novel wideband polarizer is presented, to convert the linear polarization of directive antenna into circular polarization. This innovative based on 3D frequency selective surface (FSS) and consists an array 4×4 metal axial-mode helices. The proposed broadband operates in 28 31 GHz band. To demonstrate principle, FSS applied linearly polarized Yagi-Uda operating same millimeter-wave measured simulated results, by integrating front antenna, show that axial ratio smaller than...

This paper describes the development of a small ribbon monopole antenna for UHF and VHF frequency maritime applications. A LC-matching circuit is used to switch from band, without degrading antenna's performances. Experimental numerical results demonstrate that proposed exhibits bandwidth approximately 12.3% 4% (420 MHz) (167 respectively. The total efficiency was measured with two methods (reverberation chamber Wheeler cap): it higher than 90% in both bands.

This paper deals with a method to miniaturize an artificial magnetic conductor using interdigital capacitances. An resonance frequency of 2.66 GHz is designed and manufactured. The size unit cell 15 χ mm2 or 0.13 × λο. measurement result shows slightly higher than the simulated one. Two circuit models are proposed model simulation measured results.

An array of monopole antennas over a ground plane that radiates directive lobe in the end-fire direction are described this paper. The design uses rigorous method by Drouet et al. 2008 order to synthesize radiation through strong cumulative coupling between monopoles. A gain higher than 20 dB was achieved 4.5% bandwidth. However, antenna has been tilted compensate beam deviation caused edge diffraction. prototype with 12 elements manufactured validate principle and whole is successfully...

In this paper, a new band-stop frequency selective surface is presented to convert omnidirectional pattern directional and enhance the antenna gain. The designed FSS unit-cell composed of Jerusalem cross shape strip at top square ring bottom holds size 0.46λ × (at 28 GHz). performance structure optimized using CST microwave studio. structure, an layer employed with array 3 4 unit cells located in vicinity colinear as radiating source, which resonate GHz. Obtained results show gain...